Product Specification

304Cu Stainless Steel Cold Heading Wire 0.15–12mm for Easy Forming

Product Introduction

TOPONE 304Cu stainless steel cold heading wire is designed for manufacturers producing screws, bolts, rivets, pins and other cold-formed stainless steel components.

Made from SUS 304Cu stainless steel, the wire is supplied in a 0.15–12mm diameter range with a bright surface. 304Cu contains copper as an alloying element, making it a commonly selected grade for stainless steel cold heading and fastener manufacturing.

During cold heading, wire is formed inside a die at room temperature. Therefore, material grade, diameter, mechanical properties, surface condition and lubrication requirements should be considered together when selecting the wire.

The exact specification should be confirmed according to the finished component design, forming sequence, tooling and applicable material standard.

Product Specifications

Technical Note: Tensile strength, elongation, hardness and dimensional tolerance should be confirmed according to the selected diameter, applicable standard and customer's cold heading process.

Why Choose 304Cu Cold Heading Wire?

304Cu Stainless Steel Grade

304Cu is an austenitic stainless steel grade containing copper. The addition of copper is relevant to cold-forming applications and makes this grade commonly used for stainless steel fastener production.

According to the available material data, 304Cu is listed with approximately 3–4% Cu, while chromium and nickel contents should be controlled according to the applicable material specification.

0.15–12mm Diameter Range

The available diameter range is 0.15–12mm, allowing manufacturers to select wire according to the dimensions of screws, bolts, rivets, pins and other cold-formed components.

For precision fasteners, diameter tolerance should be specified together with the nominal wire diameter.

Bright Surface

The bright surface provides a clean metallic wire condition for applications where surface appearance and surface condition are part of the production specification.

For cold heading processes requiring additional lubrication, a soap-coated surface can also be considered according to the forming equipment and production requirements.

Designed for Cold Forming

Cold heading subjects stainless steel wire to compressive deformation inside dies and punches. Therefore, material condition, diameter, surface condition and mechanical properties should be matched to the forming operation.

For multi-stage heading or components with substantial deformation, the wire specification should be confirmed against the customer's forming sequence and tooling.

Applications

Stainless Steel Screws

304Cu cold heading wire can be used for manufacturing stainless steel screws through cold heading and subsequent threading operations.

Bolts and Studs

The wire can be processed into bolts, studs and other fastener components where the selected grade and mechanical condition meet the required specification.

Rivets and Pins

304Cu wire can be considered for cold-formed rivets, pins and other small precision components.

Precision Fasteners

For precision fasteners, the wire diameter, tolerance, surface condition and mechanical properties should be specified according to the component drawing and production process.

How to Select 304Cu Cold Heading Wire?

1. Confirm Material Grade

Specify SUS 304Cu or the required equivalent designation according to the applicable standard.

2. Confirm Wire Diameter

Select the required diameter within the 0.15–12mm range.

For precision cold heading, the required diameter tolerance should also be provided.

3. Check Mechanical Properties

Tensile strength, elongation and hardness can affect the forming process.

The required mechanical values should be confirmed according to the selected diameter, standard and cold heading process.

4. Confirm Surface Condition

The standard specification on this page is bright surface.

If additional lubrication is required during cold heading, a soap-coated surface may be considered according to the customer's equipment and forming process.

5. Confirm Forming Process

Provide information about:

• Cold heading machine

• Number of forming stages

• Finished component dimensions

• Heading ratio

• Die design

• Threading process

• Required surface condition

This information helps determine whether the selected 304Cu wire specification matches the production process.

Product Advantages

304Cu Grade for Fastener Manufacturing

SUS 304Cu is commonly used in stainless steel fastener production and cold-forming applications.

Wide Diameter Selection

The 0.15–12mm range covers fine wire and larger cold-forming wire specifications for different component sizes.

Bright Surface Available

The bright surface is suitable where a clean metallic surface is required as part of the manufacturing specification.

Multiple Standards Supported

The wire can be supplied according to ASTM, JIS, EN, DIN, GB and equivalent standards. The specific standard should be confirmed before production.

Specification-Based Supply

Diameter, tolerance, mechanical properties, surface condition, coil dimensions and packaging can be discussed according to the customer's production requirements.

Technical Specification Checklist

Before ordering 304Cu cold heading wire, buyers should confirm:

FAQ

What is 304Cu stainless steel cold heading wire?

304Cu stainless steel cold heading wire is an austenitic stainless steel wire used for cold heading and cold forging of screws, bolts, rivets, pins and other fasteners.

What is the diameter range?

TOPONE supplies this product range from 0.15mm to 12mm. The required diameter and tolerance should be confirmed according to the component drawing and applicable standard.

Why is 304Cu used for cold heading?

304Cu contains copper as an alloying element and is commonly used for stainless steel fastener manufacturing where cold-forming characteristics are important.

What surface is available?

This product is specified with a bright surface. Soap-coated options can be considered when additional lubrication is required during cold heading.

What products can be made from 304Cu wire?

Typical applications include screws, bolts, studs, rivets, pins and other stainless steel cold-formed fasteners.

What information should I provide for a quotation?

Please provide the material grade, wire diameter, tolerance, surface condition, mechanical requirements, applicable standard, application, quantity and packing requirements. A component drawing is recommended for precision cold heading applications.