0.5mm Stainless Steel Cold Heading Wire for Precision Fasteners

0.5mm Stainless Steel Cold Heading Wire

TOPONE 0.5mm Stainless Steel Cold Heading Wire is designed for cold heading, cold forging and precision wire forming applications. The wire is supplied in stainless steel grades selected according to the required combination of formability, ductility, machinability and corrosion resistance.

Available grades include AISI 201, 204Cu, 303, 304, 304HC, 316, 316L, 410 and 430, depending on the required application and technical specification.

With a nominal diameter of 0.5 mm, this fine stainless steel wire is suitable for small fasteners and formed components where dimensional requirements and cold-forming characteristics need to be considered together.

Product Specifications

Note: Grade, mechanical properties, surface condition and dimensional tolerance should be confirmed according to the intended cold-forming process and applicable product standard.

What Is Stainless Steel Cold Heading Wire?

Stainless steel cold heading wire is wire material prepared for forming fasteners and other components through cold heading or cold forging processes.

During cold heading, a length of wire is placed into a die and subjected to controlled forming forces. The material flows into the die cavity to create the required head or formed section without heating the workpiece.

The selection of cold heading wire depends on the required forming geometry, amount of deformation, tooling conditions, material grade and final component requirements.

For stainless steel fasteners, commonly used materials include austenitic, ferritic and martensitic grades, with each material offering different forming and mechanical characteristics.

Available Stainless Steel Grades

AISI 304 / 304HC

304 stainless steel is widely used for cold heading applications. Modified grades such as 304HC can be selected when improved cold-forming characteristics are required.

The exact grade should be selected according to the required deformation, fastener geometry and applicable standard.

AISI 316 / 316L

316 and 316L stainless steel can be selected for applications requiring the characteristics of molybdenum-containing austenitic stainless steel.

They are commonly considered for fasteners and formed components used in environments where higher corrosion resistance is required than standard 304 applications.

AISI 303

AISI 303 is a free-machining stainless steel grade and can be considered where machining characteristics are important. Its suitability for a specific cold-forming process should be evaluated according to the component geometry and forming requirements.

AISI 201 / 204Cu

201 and 204Cu are alternative stainless steel grades used in selected fastener and formed-wire applications. Grade selection should consider the required material properties, forming process and service environment.

AISI 410 / 430

410 and 430 belong to different stainless steel families from the 300 series and may be selected when their specific mechanical or material characteristics are required.

The appropriate grade should be confirmed based on the final component requirements rather than selecting only by material price or nominal grade.

Cold Heading Applications

0.5mm stainless steel cold heading wire can be processed into small formed components and precision fasteners, depending on the selected grade and forming process.

Screws

Fine stainless steel cold heading wire can be used as feedstock for small screw production where the wire specification is compatible with the forming and threading process.

Pins and Rivets

The wire can be formed into pins, rivets and other small fastening components.

Bolts and Studs

For larger or more complex fasteners, the required wire diameter and grade should be selected according to the finished component dimensions and cold-heading deformation.

Other Formed Components

Potential applications include:

• Fasteners

• Screws

• Pins

• Rivets

• Studs

• Small hardware

• Mechanical formed parts

• Electrical components

• Wire-formed components

Surface Options

Bright Surface

A bright surface can be selected for applications requiring a clean metallic appearance and controlled wire surface.

Soap-Coated Surface

A soap-coated surface can provide lubrication for suitable cold-forming processes. The suitability of the coating should be evaluated according to the customer's forming equipment and lubrication system.

The required surface condition should be confirmed before production.

Mechanical Properties

The mechanical properties of cold heading wire should be matched to the selected stainless steel grade, wire diameter and forming process.

For example, the product data for austenitic cold heading wire lists different tensile strength and elongation requirements according to material grade and diameter. For AISI 304(L)/304J3 below 2.0 mm, the listed WSA range is 560–710 N/mm² with minimum elongation of 30%, while the WSB range is 580–760 N/mm² with minimum elongation of 20%. AISI 316(L) below 2.0 mm is listed at 560–710 N/mm² for WSA and 580–760 N/mm² for WSB.

These values should not be treated as a universal specification for every 0.5mm wire. The final tensile strength, elongation and other mechanical requirements should be confirmed according to the selected grade and applicable standard.

How to Select 0.5mm Cold Heading Wire

1. Confirm the Stainless Steel Grade

Choose the material according to corrosion requirements, forming behavior, mechanical requirements and final application.

2. Confirm the Wire Diameter

For this product, the nominal diameter is 0.5 mm. Diameter tolerance should be specified according to the applicable standard and cold-heading equipment.

3. Evaluate the Forming Process

The amount of material deformation, head configuration, die design and number of forming operations should be considered when selecting the wire condition.

4. Confirm Mechanical Properties

Tensile strength, elongation and other mechanical properties should be specified according to the selected grade and applicable standard.

5. Select the Surface Condition

Bright or soap-coated surface can be selected according to the forming equipment and lubrication requirements.

Product Advantages

Multiple Stainless Steel Grade Options

TOPONE provides cold heading wire in different stainless steel grades, including 201, 204Cu, 303, 304, 304HC, 316, 316L, 410 and 430, allowing material selection according to the required forming and service conditions.

Fine 0.5mm Diameter

The 0.5mm diameter is suitable for small fasteners and precision formed components where fine wire dimensions are required.

Cold-Forming Oriented Specifications

Wire diameter, mechanical properties, surface condition and material grade can be specified according to the intended cold-heading process.

Multiple Surface Conditions

Bright and soap-coated surface options are available for different production and lubrication requirements.

Multiple International Standards

The product can be specified according to ASTM, EN, DIN, JIS or GB requirements, subject to the agreed technical specification.

Quality Inspection

Quality inspection for cold heading wire should focus on measurable characteristics relevant to the forming process.

Depending on the agreed specification, inspection may include:

• Chemical composition

• Wire diameter and tolerance

• Tensile strength

• Elongation

• Surface condition

• Visual inspection

• Coil dimensions

• Weight

• Packaging condition

• Applicable standard requirements

A Mill Test Certificate can be supplied with the shipment according to the order requirements, and third-party inspection can also be arranged when required.

Packaging

The 0.5mm stainless steel cold heading wire can be supplied in coils or spools according to the customer's production and handling requirements.

The listed coil inner diameter range is 250–1000 mm. Special packaging with plates or other customized packaging arrangements can be discussed according to the order requirements.

FAQ

What is 0.5mm stainless steel cold heading wire used for?

It is used as feedstock for cold heading, cold forging and wire forming of small fasteners and formed components, including screws, pins, rivets and other hardware.

Which stainless steel grades are available?

Available grades listed for this product include AISI 201, 204Cu, 303, 304, 304HC, 316, 316L, 410 and 430. The exact grade should be confirmed according to the application and forming process.

What is the diameter range?

The product specification lists a diameter range of 0.15–12 mm, with this product focused on a nominal 0.5mm diameter.

What surface options are available?

Bright and soap-coated surface options are available.

Can the wire be used for screws?

Yes. Stainless steel cold heading wire is commonly used as feedstock for screws and other fasteners, provided the selected grade and mechanical condition are suitable for the forming process.

How should I choose between 304, 316 and 410?

The selection should be based on the required corrosion resistance, forming characteristics, mechanical requirements, component design and service environment.

Can the mechanical properties be customized?

Mechanical properties can be discussed according to the selected stainless steel grade, diameter, applicable standard and customer's cold-forming requirements.