Hexagon Socket Round Head Screws A4-70 BS 2470

24/05/2024 / Fasteners, Hexagon socket bolts

About the product size and usage introduction of Hexagon Socket Round Head Screws

BS 2470 Standard Size Data Sheet

Introduction to Hexagon Socket Round Head Screws

Hexagon socket round head screws, also known as button head cap screws or socket button head screws, are a type of fastener characterized by their cylindrical head with a hexagonal socket drive and a rounded top. Here are some key features and applications:

Key Features:

Hexagonal Socket Drive:

Allows for a strong, secure grip with a hex key or Allen wrench.
Facilitates easy installation and removal in tight spaces.

Round Head:

Provides a clean, smooth finish.
Minimizes snagging or catching on surrounding objects.

Materials:

Typically made from steel, stainless steel, or alloy steel.
Can be coated with zinc, black oxide, or other finishes for corrosion resistance.

Sizes:

Available in various diameters and lengths to suit different applications.
Commonly specified by metric (M3, M4, M5, etc.) or imperial (inch-based) measurements.

Applications:

Machinery and Equipment:

Used in assembling mechanical parts where a flush finish is desired.
Often found in automotive, aerospace, and industrial equipment.

Electronics:

Securely fastens components without causing damage or short circuits.

Furniture:

Provides a sleek, finished look while maintaining strong assembly.

DIY Projects:

Popular in hobbyist and maker communities for their ease of use and aesthetic appeal.

Advantages:

Strong and Durable: Can withstand significant torque and stress.
Aesthetic Appeal: Provides a polished look suitable for visible joints.
Versatile: Suitable for a wide range of materials and applications.

Installation Tips:

Correct Tool Size: Ensure using the correct size hex key to prevent stripping the socket.
Torque Specifications: Follow manufacturer recommendations for tightening torque to avoid over-tightening.
Thread Locking: Use thread-locking compounds for applications subject to vibration.

When choosing hexagon socket round head screws, consider the specific requirements of your project, including the material, finish, size, and any environmental conditions the fasteners will be exposed to.

hexagonal bolt production process

20/05/2024 / Hex Bolt

What are the production processes of fastener products hexagonal bolts?

Hexagonal bolts are a common fastener and are widely used in machinery manufacturing, automobiles, aviation, and other fields. So, how are hexagonal bolts produced? The following is an introduction to the production process of our company’s production department.

1. Raw material preparation

The raw materials of hexagonal bolts are mainly made of metal materials, which is the material range we operate (carbon structural steel, stainless steel, super duplex steel, nickel-based alloy, titanium alloy, copper alloy). First of all, it is necessary to purchase suitable materials. Before the raw materials are put into storage, the steel must be inspected and quality confirmed. Then carry out pre-processing work such as cutting and blank processing so that subsequent processing can proceed smoothly. The appropriate length of raw material is then forged. The preheated metal blank is put into the mold, and pressure and impact are applied at high temperatures to deform it to form the blank of the hexagonal bolt. The blank needs to remove hammer marks and surface oxide scale.

2. Processing and manufacturing

The pre-treated blank is heated to the appropriate temperature and then placed on the press for shaping. The forming of hexagonal bolts is usually divided into two methods: cold heading and hot heading. Cold heading is beneficial to improve production efficiency, while hot heading can improve the firmness and corrosion resistance of hexagonal bolts. After processing is completed, the finished products are inspected and screened by our QA.

3. Heat treatment

After completing cold or hot heading forming, the hexagonal bolts need to be heat treated. Heat treatment can increase the strength and hardness of hexagonal bolts, giving them higher tensile properties and wear resistance. This step is very important. We completely follow the heat treatment type and requirements in the material execution standards to ensure that the temperature meets the requirements. This process requires proper heating and cooling techniques to ensure the overall quality of the hexagonal bolts is reliable.

4. Processing threads

Threading is the use of mechanical equipment to process the outside or inside of a workpiece. It is usually divided into two types: internal threads and external threads. The main methods for processing threads include turning, milling, grinding, grinding, rolling, tapping and threading. Among them, thread rolling is a commonly used method in fasteners. It uses a forming rolling die to plastically deform the workpiece to obtain threads. Thread rolling is generally performed on a thread rolling machine or an automatic lathe equipped with an automatic opening and closing thread rolling head. It is suitable for mass production of external threads of standard fasteners and other threaded connections.

The advantages of thread rolling are as follows:

The surface roughness is smaller than that of turning, milling and grinding;
The strength and hardness of the thread surface after rolling can be improved due to cold work hardening;
High material utilization rate;
The productivity is doubled compared with cutting processing, and it is easy to realize automation;
The rolling die has a long life. However, rolling threads require that the hardness of the workpiece material does not exceed HRC40; the dimensional accuracy of the blank is high; the accuracy and hardness requirements of the rolling mold are also high, making it difficult to manufacture the mold; it is not suitable for rolling threads with asymmetric tooth shapes.

5. Surface treatment

The surface treatment of hexagonal bolts is very important as it provides them with enhanced corrosion resistance, better anti-rust properties, decorative effects, etc. Surface treatment processes can be adopted (Hot Dip Galvanizing – standards ASTM A153, Electro Zinc Plating – standards ASTM B633, Teflon, PTFE-Xylan 1024/1070, Ceramic Filled Fluorocarbon Coating, Silver Plating – standards ASTM B254, GEOMET 321/720 – standards ASTM F1136, Electro less Nickel Plating – standards ASTM B733, Nickel Plating – ASTM B689, Electrodeposited Zinc Nickel Plating – standards ASTM B841, Cadmium-plated standards ASTM A165). Among them, the quality of surface treatment can affect the overall performance and appearance of hexagonal bolts.

6. Industrial testing

After production is completed, hexagonal bolts undergo a variety of inspection and testing processes to ensure that the product meets quality standards. Inspection content usually includes appearance inspection, dimensional inspection, tensile and torque strength inspection, etc.

7. Packaging

The final step is to package and deliver the hexagonal bolts. Packaging needs to use packaging materials and methods that meet the standard requirements of the target customer’s country to avoid damage to the goods during transportation and use and affect the import customs clearance progress.

In short, the production of hexagonal bolts is a multi-step process, each step of which requires careful operation and proper skills. Our workers have an average of 15 years of production experience. Only by strictly following the process can we ensure the stable quality, firmness and durability of the hexagonal bolts.

12-Point Flange Head Screws L9 / Class 12.9

11/04/2024 / 12-Point Flange Head Bolt

How to manufacture 12-point Flange head bolts?

1. What is a 12-point Flange head bolt

The 12-point flange bolt refers to a head-type bolt with twelve corners and a flange surface.

The 12-point flange screw drive has twelve splines in the fastener and tool. It consists of 12 equally spaced protrusions, each with a 60° angle. It is achieved by overlaying 4 equilateral triangles, each one rotated 30° over the previous one. The spline drive was part of the obsolete, U.S-designed Optimum Metric Fastener System and was defined by ASTM B18.2.7.1M

2. What are the standards for 12-point bolts?

There are mainly American standards such as ANSI, ASME, JIS, IFI, standards, etc.

12-point flange bolt ANSI B18.2.7.1M-1999
12-point flange bolt ASMEB18.2.7M-1999
12-point flange bolt IFI115-2002
12-point flange bolt JB6686-1993

Spline drives were specified for 5, 6.3, 8, 10, 12, 14, 16, and 20 mm size screws. Its primary advantage is its ability to resist cam out, so it is used in high-torque applications, such as tamper-proof lug nuts, cylinder head bolts, and other engine bolts.

3. Application environment of 12-point flange bolts

The 12-point flange bolt is widely used in multiple industries and application scenarios due to its unique design and function. The following are some main application scenarios:

Aerospace industry: These bolts are commonly used in the structure and engine components of aircraft and spacecraft because they can withstand high stress and vibration.
Automotive industry: In high-performance vehicles and racing cars, 12-point flange bolts are used in key parts such as engines, transmissions, and suspension systems, providing reliable connections and high strength.
Oil and natural gas: In drilling equipment, offshore platforms, and refineries, these bolts are used for connection parts that require high strength and corrosion resistance.
Heavy machinery and equipment: In construction, mining, and agricultural equipment, 12-point flange bolts are used for critical mechanical connections to ensure stability and durability.
Industrial pipelines and pressure vessels: In pipelines and pressure vessel systems in the chemical, petrochemical, and pharmaceutical industries, these bolts are used in high-pressure and high-temperature environments to provide reliable sealing and connection.
Power generation equipment: In nuclear power plants and other power generation facilities, these bolts are used for connecting equipment such as turbines, boilers, and heat exchangers, requiring high strength and creep resistance.
Military and national defense: Used in military vehicles, ships, and equipment, requiring high reliability and strength connection parts.

Overall, 12-point flange bolts perform well in applications that require high stress, vibration, and harsh environments due to their high strength, durability, and reliability.

Product slotted pan head screws standard DIN 921 Material duplex stainless steel S32750

slotted pan head screws DIN 921 UNS S32750

24/05/2023 / Fasteners, Pan Head Screws, Posts

Production process of slotted pan head screws with large head

HOTFORGE INDUSTRIAL LIMITED is a professional fastener manufacturer, specializing in the production of threaded rods, bolts, nuts, washers and other mechanical forging parts. Our products are widely used in standards in petrochemical, aerospace, automotive production, construction and equipment manufacturing and other related industries. We are proud to provide customized solutions according to the specific needs of our customers.

The production process of slotted pan head screws with large head mainly includes the following steps:

1. Purchase raw materials hot rolled wire rod

Raw material supplier high-speed hot-rolled wire rod

2. Automatic wire drawing machine

3. Screw cold heading machine

Multi stroke screw heading machine or cold heading machine

Cold blots heading punch — Cold heading punch

4. Bolt product heat treatment furnace

5. Bolt processing Rolling thread

Bolts rolling thread machine — Rolling thread machine

6. Laser marking of bolt products

7. Packaging and delivery

Summary:

Slotted pan head screws DIN 921 production involves multiple steps such as raw material preparation, cold heading forming, wire rolling, heat treatment, surface treatment, inspection and testing, and packaging. Each step requires strict control to ensure that the quality and performance of the finished bolts meet the requirements. Can fully meet the project usage needs of users.

For more detailed specifications and models, you can refer to manufacturers’ websites or technical product catalogs.

stainless u-bolts

03/09/2010 / U-Bolts

What are the production processes of stainless u-bolts？

The production of stainless U bolts involves several steps that transform raw stainless steel materials into the final U-bolt shape with the desired specifications. Here’s a general overview of the production process of stainless U-bolts:

Material Selection: Stainless steel is chosen as the raw material for its corrosion resistance, strength, and aesthetic appeal. The specific type of stainless steel (e.g., 304, 316) is selected based on the intended application and environmental conditions.
Cutting: Stainless steel rods of the appropriate diameter are cut to the required length, depending on the size and specifications of the U-bolt.
Bending: Once cut, the rods are then bent into the shape of a U using a bending machine or a press. The bending process ensures the uniformity of the curve and accurate spacing between the legs.
Threading: The ends of the U-bolt are threaded using a threading machine, which cuts threads into the steel to allow for nuts to be screwed onto the ends.
Heat Treatment: Depending on the specific requirements, the U-bolts might undergo a heat treatment process to enhance their mechanical properties, such as strength and toughness.
Surface Finish: U-bolts undergo processes like polishing, passivation, or coating to improve their appearance, corrosion resistance, and overall performance. Passivation removes free iron from the surface, enhancing the natural corrosion resistance of stainless steel.
Inspection: Once manufactured, the U-bolts undergo quality control to check for dimensional accuracy, surface quality, and any potential defects.
Packaging: After inspection, the U-bolts are packaged along with nuts and washers (if part of the set) and prepared for shipping.
Shipping and Distribution: The final product is then shipped to distributors, retailers, or directly to customers based on orders.

It’s worth noting that while the above steps provide a general idea of the process, specific manufacturing details might vary based on the production facility, equipment used, and the exact specifications of the U-bolts being produced.

What scenarios are stainless u bolts suitable for?

Stainless steel U-bolts are versatile fasteners suitable for a wide range of applications across various industries. Their design, which consists of a U-shaped bolt with threaded ends, makes them particularly useful in scenarios where secure attachment, stability, and corrosion resistance are required. Here are some common scenarios where stainless steel U-bolts are suitable:

Pipe and Tube Fastening: U-bolts are commonly used to secure pipes, tubing, and conduit to support structures or mounting brackets. They provide a stable and adjustable connection for plumbing and electrical systems.
Marine and Coastal Environments: Stainless steel U-bolts are highly corrosion-resistant, making them ideal for marine applications. They are used to secure equipment, cables, and components on boats, docks, and in coastal settings.
Vehicle and Trailer Suspension: U-bolts are used to secure leaf springs in automotive and trailer suspension systems. They provide strength and stability to the suspension components.
Construction and Building: U-bolts are used in construction to anchor beams, columns, and support structures. They are also employed for attaching hardware to steel and concrete.
HVAC and Plumbing: In heating, ventilation, air conditioning (HVAC), and plumbing systems, U-bolts are used to secure ductwork, pipes, and related components.
Antenna Mounting: U-bolts are utilized to secure antennas and satellite dishes to masts, towers, and other support structures.
Exhaust Systems: Stainless steel U-bolts are commonly used to attach exhaust pipes and mufflers in automotive and industrial exhaust systems due to their resistance to high temperatures and corrosion.
Railings and Fencing: U-bolts are used to attach handrails, guardrails, and fencing to support posts and structures.
Industrial Equipment: U-bolts secure equipment and machinery in industrial settings, ensuring stability and minimizing vibration.
Renewable Energy: They are used to secure solar panels and wind turbine components to mounting structures.
Agriculture: U-bolts are employed in farming equipment and machinery for attaching components and securing loads.
Telecommunications: U-bolts are used for mounting and securing antennas, satellite dishes, and communication equipment on towers and poles.
Outdoor and Recreational Equipment: They are used in applications like bike racks, trailers, and camping gear for attachment and support.

Stainless steel U-bolts are valued for their durability, resistance to corrosion, and ability to provide a secure and adjustable connection. The specific application will determine the size, material grade, and configuration of the U-bolt used.

nut bolt washer

07/09/2009 / Fasteners

nut bolt washer product categories

What are the types of bolts products?

Bolts are diverse fasteners that come in various types, each designed for specific applications. Here are some of the common types of bolt products, nut bolt washer product type:

Hex Bolts (or Hexagon Bolts): Recognizable by their hexagonal head. They are general-purpose bolts and one of the most commonly used.
Carriage Bolts: Feature a round head with a square neck beneath, primarily used in wood applications.
Lag Bolts (or Lag Screws): Large wood screws with a hex or square head.
U-Bolts: U-shaped, they are typically used to attach pipes and other round objects to surfaces.
J-Bolts: J-shaped, they are often used to anchor bolts into concrete.
Eye Bolts: Have a circular loop on the head, used for attaching ropes or cables.
T-Bolts: Feature a T-shaped head, used in some clamping applications.
Flange Bolts: Incorporate a flange or washer-like base beneath the bolt head.
Anchor Bolts: Embedded in concrete or masonry, used to anchor structures.
Stove Bolts: Machine threaded bolts with a slotted or Phillips head.
Socket Cap Bolts: Designed to be driven by a socket wrench.
Plow Bolts: Used in the assembly of heavy equipment, they have a flat head.
Elevator Bolts: Have a large, flat head, used in conveyor systems.
Step Bolts: Similar to carriage bolts but with a lower profile.
Structural Bolts: Specifically designed for structural steel connections.
Wheel Bolts: Used to secure wheels on vehicles.
Stud Bolts: Threaded rods used in flange-to-flange connections.

Each type of bolt serves a unique purpose based on its design and the specific requirements of the application.

What are the types of Nuts products?

Nuts, like bolts, come in various types to suit different applications. Here are some common types of nut products:

Hex Nuts (or Hexagon Nuts): These have six flat sides and are the most common type of nut.
Nyloc Nuts (Nylon Lock Nuts): Hex nuts with a nylon insert that prevents them from loosening due to vibration.
Wing Nuts: These nuts have two “wings” that make them easy to tighten and loosen by hand. They’re often used in applications where tools aren’t readily available.
Cap Nuts (Acorn Nuts): These nuts have a domed cap that covers the end of a bolt. They are often used for decorative purposes and to protect threads from damage.
Square Nuts: Square-shaped with flat sides, they are often used in applications where the nut needs to stay in place.
T-Nuts: Shaped like a “T,” they are often used to create a threaded insert in wood or composite materials.
Flange Nuts: These nuts have a built-in washer (flange) that distributes the load and prevents the nut from sinking into the material.
Cage Nuts: These nuts have a spring-like cage that allows them to be easily inserted into square holes.
Slotted Nuts: These nuts have slots cut into the top, allowing them to be easily tightened or loosened with a screwdriver.
Kep Nuts (K-Nuts): These nuts have an attached washer-like base that provides extra grip and prevents over-tightening.
Jam Nuts: Thinner than standard nuts, they are often used as a secondary nut to prevent the main nut from loosening.
Castle Nuts (Castellated Nuts): These nuts have slots or notches and are often used in conjunction with a cotter pin to secure a bolt.
Dome Nuts: Similar to cap nuts, these have a rounded dome-shaped top and are often used for decorative purposes.
Lock Nuts: General term for nuts designed to resist loosening due to vibration or torque. Examples include prevailing torque nuts and distorted thread locknuts.
Flange Serrated Nuts: These nuts have serrations on the flange to grip the surface and resist loosening.
Panel Nuts: Often used in electronics and panels, these nuts have a thin profile.
Hex Coupling Nuts: Used to join two threaded rods or bolts.
High Nuts: Taller than standard nuts, they are used to provide extra thread engagement.
Weld Nuts: Designed to be welded to another surface.
Self-Locking Nuts: These nuts have features that prevent them from loosening under vibration or torque, without the need for additional locking devices.

The choice of nut depends on factors like the type of bolt, the material being fastened, the required torque, and the specific application requirements.

What are the types of washer products?

Washers are flat, typically round pieces of metal or non-metal materials designed to evenly distribute the load of a threaded fastener, such as a bolt or screw. They can also function as spacers, wear pads, vibration reducers, and locking devices. Here are some common types of washer products:

Flat Washers: Standard washers used to distribute the load across a wider surface area.
Spring Washers (or Split Lock Washers): Used to prevent nuts and bolts from coming loose due to vibrations.
Lock Washers: Provide a tighter connection and prevent the nut or bolt from turning due to vibration or torque.
Belleville Washers: Conical in shape, they can support high loads with relatively small deflections.
Fender Washers: Thinner than standard flat washers and have a larger outer diameter.
Square and Rectangular Washers: Often used in channel applications where a round washer would not fit.
Wave Washers: Used as cushions or spacers between parts, they have a wave in their flat outer ring.
Star Washers (or Toothed Lock Washers): Have teeth that extend inward or outward to bite into the bearing surface.
Countersunk Washers (or Finishing Washers): Used with flat or oval head screws where a finished appearance is desired.
Beveled Washers: Used in structural applications to ensure a flat bearing surface when a bolt will not be perpendicular to the surface.
Dome or Cup Washers: Convex shaped, typically used to protect materials or to cover holes.
Spherical Washers: Consist of two pieces and are used to correct misalignment.
Tab Washers: Feature a tab for indexing, aligning, and locking.
Shoulder Washers: Used for insulating screws, rods, or electric wires.
Ogee Washers: Used in dock and wood construction for its large bearing surface and the ability to cover large holes.
C-Washers: Have a slot cut from the center to the outside edge, used to make adjustments to connections.

Each type of washer serves a unique purpose based on its design and the specific requirements of the application.

astm a320 l7 bolts

05/09/2008 / Fasteners

astm a320 l7 bolts production process

The production of ASTM A320 L7 bolts involves multiple steps to ensure they meet the required mechanical and chemical properties for low-temperature bolting applications. Here is a generalized production process for these bolts:

Material Selection: Begin with choosing the right grade of chromium-molybdenum alloy steel bar stock that meets the A320 L7 specifications.
Cutting: The bar stock is cut to the desired length, based on the intended size of the bolts.
Heating: The cut pieces are heated in a furnace to achieve the desired temperature for forging.
Forging: Using a press or hammer, the heated pieces are forged into the rough shape of the bolt. This process helps in aligning the grain structure of the steel, improving its mechanical properties.
Thread Rolling: Once the bolts are forged and cooled, they undergo a thread rolling process. This is done using two flat dies that have the reverse of the thread profile. When the bolt is rolled between these dies, it forms the threads.
Heat Treatment: To achieve the required mechanical properties, the bolts are subjected to a heat treatment process, which typically includes quenching and tempering. This process ensures the bolts have the necessary toughness and strength for low-temperature applications.
Inspection: After heat treatment, the bolts undergo various inspections to ensure they meet the specified standards. This includes dimensional checks, visual inspection, hardness testing, and sometimes more advanced tests like ultrasonic or magnetic particle inspection.
Protective Coating (if required): Depending on the application and customer requirements, the bolts might receive a protective coating, such as zinc plating or hot-dip galvanizing, to provide corrosion resistance.
Packaging: Once the bolts have passed all inspections and any finishing processes, they are packaged for shipment.
Documentation: Along with the bolts, manufacturers usually provide a certificate of compliance or a test report that verifies the bolts meet the ASTM A320 L7 standard’s requirements.

This process may vary slightly depending on the manufacturer’s equipment, facilities, and specific customer requirements.

Usage scenarios of astm a320 l7 bolts?

ASTM A320 L7 bolts are specifically designed for low-temperature applications. Their properties make them ideal for situations where good strength and toughness are required at cold temperatures. Here are some common usage scenarios for ASTM A320 L7 bolts:

Petrochemical Industry: They are frequently used in pressure vessels, valves, flanges, and fittings that operate in low-temperature environments, especially in processes that involve liquefied natural gas (LNG) or other cryogenic materials.
Oil and Gas Industry: For installations in colder climates or deep-sea drilling platforms where equipment is exposed to low temperatures, L7 bolts provide reliable performance.
Power Generation: In some power generation facilities, especially those in colder regions, equipment might be subjected to low temperatures, necessitating the use of ASTM A320 L7 bolts.
Chemical Processing: Certain chemical processes require equipment to operate at or be exposed to low temperatures. L7 bolts ensure the integrity of these installations.
Structural Applications: In regions where temperatures can drop significantly, structures like bridges or buildings might use ASTM A320 L7 bolts to ensure the integrity of the joints and connections, especially if they’re load-bearing.
Refrigeration Systems: Large industrial refrigeration systems, especially those used in food processing or cold storage warehouses, may utilize L7 bolts due to their low-temperature performance.
Pipelines: Pipelines that transport cold liquids, especially in the Arctic regions or other cold environments, might use L7 bolts for flanges, supports, and other connection points.
Heavy Machinery: Some heavy machinery designed for use in cold climates, such as those used in polar research stations or ice-breaking ships, might incorporate ASTM A320 L7 bolts.
Aerospace: Certain aerospace applications that require hardware to perform reliably at very low temperatures might employ L7 bolts.

When selecting fasteners for specific applications, it’s crucial to consider the operating environment, the materials being joined, and any potential temperature variations to ensure optimal performance and safety.

alloy steel screws

05/09/2007 / Fasteners

Usage scenarios for alloy steel screws

Alloy steel screws are versatile fasteners that benefit from the additional elements mixed with the steel to provide improved mechanical properties. Depending on their specific compositions and treatments, alloy steel screws can offer enhanced hardness, toughness, wear resistance, and corrosion resistance compared to regular carbon steel screws. Here are some of the application scenarios for alloy steel screws:

High-Stress Applications: In machinery or structures where components are under heavy loads or stresses, alloy steel screws can provide the necessary strength and resilience.
High-Temperature Environments: Certain alloy steels are designed to maintain their strength and integrity under high temperatures, making them suitable for applications like engines, boilers, or turbines.
Wear-Resistant Applications: For machinery or equipment that is subject to frequent movement or friction, wear-resistant alloy steel screws can prolong the equipment’s lifespan.
Corrosive Environments: Some alloy steel screws, especially those with added chromium or nickel, can offer improved corrosion resistance, making them useful in chemical processing plants, marine environments, or areas with exposure to corrosive agents.
Precision Equipment: For machinery or devices that require precise tolerances and reliable performance, such as aerospace or certain automotive parts, alloy steel screws can offer the consistency and durability needed.
Outdoor Structures: Alloy steel screws with weathering characteristics are useful in outdoor applications where there’s a need for both strength and resistance to environmental factors.
Safety-Critical Systems: In systems where failure is not an option, such as braking systems in vehicles or safety equipment, alloy steel screws can provide the necessary reliability.
Electronic Devices: Some alloy steel screws are designed to provide electromagnetic shielding or grounding in electronic devices.
Heavy-Duty Equipment: Construction, mining, or agricultural equipment often uses alloy steel screws to withstand the demanding conditions and forces they experience.
Specialty Applications: Some alloy steels have specific properties that are tailored for unique applications, like non-magnetic properties for medical equipment or specific alloy combinations for particular manufacturing processes.

What materials are available for alloy steel screws?

In the realm of alloy steel screws, there are also specific grade classifications based on the composition and heat treatment processes used. For instance:

4140 Alloy Steel: A popular grade that contains chromium, molybdenum, and manganese. It’s known for its toughness, abrasion resistance, and strength.
4340 Alloy Steel: Contains nickel, chromium, and molybdenum and is known for its toughness and high-strength characteristics.
ASTM A193 B7: is a chromium-molybdenum alloy steel grade commonly used for high-temperature bolting applications. It offers excellent strength, durability, and resistance to high temperatures and pressures.
ASTM A320 L7: is a chromium-molybdenum alloy steel used for low-temperature bolting applications. It provides good strength and toughness at cold temperatures.
ASTM A193 B16: is a chromium-molybdenum-vanadium alloy steel used for high-temperature bolting applications, offering strength and thermal stability.

In selecting the right alloy steel screw for a specific application, it’s essential to consider the specific properties needed, such as tensile strength, corrosion resistance, or heat resistance. It’s always recommended to consult with a material scientist or engineer when making these decisions.

stainless steel bolts

02/09/2006 / Fasteners

Applicable scenarios for stainless steel bolts

Stainless steel bolts are popular for their anti-corrosion properties and are commonly used in a variety of scenarios, the following are some common applications:

Outdoor applications: Due to the high resistance of stainless steel to environmental factors, these bolts are especially suitable for outdoor environments such as bridges, outdoor furniture, fences and building structures.
Food and Beverage Processing Equipment: Because stainless steel does not rust or corrode easily, it is ideal for the food and beverage processing industry to ensure a pure and safe product.
Chemical and Seawater Environments: Stainless steel bolts are especially useful in chemical plants or where seawater is exposed, as they resist corrosion in these harsh environments.
Medical Equipment: Because stainless steel is very clean and durable, it is also popular in medical equipment and instruments.
Automotive and Aviation Industries: In these industries, stainless steel bolts are widely used due to their strength and corrosion resistance.
High temperature applications: Certain types of stainless steel, such as 316 or 310, have the ability to maintain their properties at high temperatures, so they are suitable for use in high temperature environments, such as boilers or heat treatment furnaces.
Home and Decor: The appearance of stainless steel makes it more and more popular in home and decoration items, such as door handles, furniture pieces or decorative pieces.

What are the types of stainless steel bolts?

Stainless steel bolts are mainly classified according to their chemical composition and properties. Below are some common types of stainless steel bolts and their brief descriptions:

304 Stainless Steel Bolts: This is the most common type of stainless steel bolt and it offers great corrosion resistance. 304 bolts perform well in most environments, especially in the food handling and chemical industries.
316 Stainless Steel Bolts: Compared to 304, 316 offers better corrosion resistance, especially to chlorides, such as sea water. Therefore, they are often used in marine applications and chemical processing equipment.
410 Stainless Steel Bolts: This is a martensitic stainless steel that can be heat treated to increase its hardness and strength. However, it is less resistant to corrosion than austenitic stainless steels.
B8 and B8M Bolts: These bolts correspond to 304 and 316 stainless steel respectively, but they are both heat treated to increase their strength.

In addition to the above basic types, stainless steel bolts can also be classified according to head shape, thread type and size, etc. Common head shapes include hex, round, square, and knurled heads. Thread type can be coarse thread, fine thread or special thread.

When selecting the appropriate stainless steel bolt, consideration should be given to the specific requirements of the application, such as required strength, corrosive environment, and temperature.

What services can our team provide?

HOTFORGE’s team consists of well-trained and qualified staff with 23 years of industry-related experience and knowledge. In addition to our impressive catalog of stainless steel fasteners, we also have access to non-standard and custom-made products. Send an inquiry today to customize a quotation for you!

duplex 2205 bolts stock

01/09/2005 / Fasteners

duplex 2205 bolts stock country of origin China

duplex 2205 bolts and nut products, let us be proud to be a reliable and high quality fastener supplier in Shanghai, China. We can provide most of the products in stock and ship them within this week, and we can provide a variety of pipe fittings, including flanges, pipe fittings, steel pipes, sealing gaskets, etc.

HOTFORGE is one of the main suppliers of super stainless steel bolts and other non-ferrous metal fasteners in China.

Why choose duplex 2205 material?

Duplex 2205 is a duplex stainless steel whose name “Duplex” comes from its structure, which contains two phases of austenite and ferrite in approximately equal proportions. Here are a few main reasons to choose Duplex 2205:

High Strength: Compared with conventional austenitic stainless steels, Duplex 2205 has higher yield strength and tensile strength. This means that thinner materials can be used to achieve the same performance, reducing weight and cost.
Excellent Corrosion Resistance: Due to its chemical composition and duplex structure, Duplex 2205 has excellent corrosion resistance in many environments, especially against chloride corrosion (such as seawater or salt spray).
Good Stress Corrosion Cracking Resistance: Compared with conventional austenitic stainless steels, Duplex 2205 has better resistance to stress corrosion cracking (SCC), especially at high temperatures and high chloride concentrations.
Lower Coefficient of Thermal Expansion: Compared to austenitic stainless steels, Duplex 2205 has a lower coefficient of thermal expansion, which is advantageous in applications where dimensional stability of the material needs to be maintained.
Cost-effective: Although Duplex 2205 may cost more than conventional stainless steel, its corrosion resistance and mechanical properties allow the use of thinner materials, potentially resulting in longer life and lower maintenance costs, and may be more cost-effective in the long run .
Weldability: While welding of Duplex 2205 requires certain special considerations, under proper conditions and procedures it can be successfully welded without losing its key mechanical and corrosion resistant properties

Which industries are duplex 2205 materials suitable for?

Here are some of the major industries where Duplex 2205 is used:

Oil and Gas Industry: Duplex 2205 is often used in oil and gas extraction and processing equipment, especially in environments containing chlorides and sulfur. Its high strength and corrosion resistance make it ideal for these conditions.
Chemical Processing Industry: This material can maintain its properties in a range of aggressive media, making it ideal for many chemical process equipment.
Marine Industry: Due to its excellent resistance to seawater and salt spray corrosion, Duplex 2205 is often used in marine applications such as ships, marine structures and seawater systems.
Water and sewage treatment industry: Duplex 2205 is used in various water treatment equipment, including seawater desalination equipment.
Pulp and Paper Industry: Duplex 2205 provides persistence and stability in the pulp and paper making process where parts are exposed to aggressive chemicals.
Building and Construction: The high strength and corrosion resistance of Duplex 2205 make it ideal for many architectural applications, especially in coastal areas or other locations where exposure to corrosive environments may occur.
Food and Beverage Industry: Due to its corrosion resistance and food-grade safety, Duplex 2205 is often used in food and beverage processing equipment.
Energy industry: In some energy applications with high temperature, high pressure or corrosive environment, Duplex 2205 can be used as the preferred material.
Heat Exchangers: Due to its excellent corrosion resistance and thermal conductivity, Duplex 2205 is often used in the manufacture of heat exchangers.

Why choose our fastener product duplex 2205 bolts?

Reliable Quality: We use a refining vacuum furnace to manufacture high-quality materials, combined with advanced production technology, to ensure that every fastener meets the highest standards in the industry.
Long-term durability: due to our strict control of the manufacturing process, including mechanical properties, chemical composition, intergranular corrosion, and Nondestructive testing. This makes our fasteners have excellent corrosion resistance and anti-wear characteristics, and can work for a long time under various environmental conditions.
More choices: We provide a variety of specifications, sizes and types of fasteners to ensure that you can meet your various application needs, and can meet customers’ various customized drawings.
Technical support: Our engineer team can provide you with technical consultation and support to ensure that the fasteners you choose perfectly match your project requirements, including standard provision and drawing.
Competitive Prices: Thanks to our efficient mass production and raw material self-sufficiency model, we are able to provide you with high-quality products at competitive prices in the industry.
Fast delivery: We have a professional documentary team for each order to ensure that your order can be delivered to you in a timely and accurate manner. Including long-term cooperative shipping companies, which can coordinate the shipping schedule and ship your goods as soon as possible.
Customer evaluation: Over the years, we have established long-term cooperative relationships with many companies, and they have given high praise to our products and services. They have participated in the supply of Middle East offshore oil projects, Russian oil well exploration projects, and Singapore refinery projects.