Product Specification

302HQ Stainless Steel Cold Heading Wire for Fastener Forming

Product Introduction

AISI 302HQ stainless steel cold heading wire is designed for manufacturers producing stainless steel fasteners through cold heading and cold forming processes.

302HQ is a copper-containing austenitic stainless steel grade commonly selected for cold heading applications. Its material characteristics make it suitable for forming operations where wire flow, work-hardening behavior, surface condition and dimensional requirements need to be considered together.

TOPONE supplies 302HQ stainless steel cold heading wire for screws, bolts, nuts, rivets and other precision fasteners. The wire is available in a 0.15–12 mm diameter range, with bright and soap-coated surface options for different forming and lubrication requirements.

The appropriate wire specification should be selected according to the fastener design, forming process, wire diameter, required mechanical properties and service environment.

Product Specifications

Why 302HQ Is Used for Cold Heading

Copper-Containing Austenitic Stainless Steel

302HQ is a copper-containing austenitic stainless steel grade developed for applications where cold forming characteristics are important.

For fastener manufacturing, the material needs to flow into the die during forming while maintaining the required properties of the finished component. Therefore, grade selection should consider work-hardening behavior together with wire diameter, forming sequence and component geometry.

Suitable for Fastener Forming

302HQ stainless steel wire is commonly used for cold heading applications such as screws, self-tapping screws, small machine screws and other precision fasteners.

The actual suitability depends on the forming ratio, number of heading stages, tooling design, lubrication condition and finished fastener geometry.

Surface Options

Bright Surface

Bright 302HQ stainless steel wire provides a clean metallic surface and can be selected when surface appearance and subsequent processing requirements are important.

It is suitable for applications such as precision screws, visible fasteners and small formed components.

Soap-Coated Surface

Soap-coated 302HQ wire can be selected when additional lubrication is required during cold heading or cold forming.

The coating condition should be matched with the forming equipment, die design, forming speed and lubrication system to support the required production process.

Delivery Conditions

Soft and Semi-Soft Conditions

302HQ cold heading wire can be supplied in soft or semi-soft conditions according to the requirements of the forming process.

The appropriate condition should be determined according to the amount of deformation, forming sequence, finished component geometry and required mechanical properties.

For customized orders, the material condition, diameter tolerance and mechanical requirements should be confirmed before production.

Applications

Stainless Steel Fasteners

302HQ cold heading wire is commonly used for manufacturing:

• Stainless steel screws

• Self-tapping screws

• Machine screws

• Bolts

• Nuts

• Rivets

• Pins

• Studs

• Small precision fasteners

Precision Cold-Formed Components

The wire can also be used for cold-formed stainless steel components in:

• Automotive components

• Electrical equipment

• Industrial hardware

• Machinery components

• General fastening systems

• Precision metal components

The final material selection should be based on the component design, forming process and service environment.

Product Advantages

Designed for Cold Heading Applications

302HQ is specifically considered for stainless steel cold heading and cold forming applications where material flow and work-hardening behavior are important factors.

0.15–12 mm Diameter Range

The available 0.15–12 mm diameter range supports different fastener sizes and cold-forming requirements, from small precision components to larger formed parts.

Bright and Soap-Coated Options

Bright and soap-coated surfaces are available according to forming and lubrication requirements. Surface selection can be matched with the customer's heading equipment and subsequent processing.

Soft and Semi-Soft Supply Conditions

Different delivery conditions can be considered according to the deformation level, forming sequence and mechanical requirements of the finished component.

International Standards

302HQ wire can be supplied according to AISI, ASTM, DIN, EN, GB and JIS requirements, subject to the agreed product specification.

How to Select 302HQ Cold Heading Wire

1. Confirm the Fastener Design

The head diameter, shank diameter, forming ratio and final geometry affect the required wire specification.

2. Select the Wire Diameter

Wire diameter should be matched with the blank size and forming sequence. TOPONE provides 302HQ wire in a 0.15–12 mm diameter range.

3. Define the Delivery Condition

Soft or semi-soft material conditions can be selected according to the required deformation and cold heading process.

4. Confirm the Surface Condition

Bright or soap-coated wire should be selected according to the lubrication system, tooling and forming requirements.

5. Confirm Mechanical Requirements

For customized production, customers should provide the required standard, diameter, tolerance, mechanical properties, surface condition and application.

Quality and Manufacturing Information

TOPONE supplies 302HQ stainless steel cold heading wire for fastener and cold-forming applications.

Production specifications can be customized according to diameter, surface finish, delivery condition, applicable standard and fastener manufacturing process.

The product is supplied under an ISO 9001:2015 quality management system.

For technical evaluation or quotation, provide the required diameter, quantity, standard, surface condition, delivery condition and fastener application.

Frequently Asked Questions

What is 302HQ stainless steel wire used for?

302HQ stainless steel wire is commonly used for cold heading and cold forming of screws, self-tapping screws, machine screws, rivets and other stainless steel fasteners.

What diameter range is available?

TOPONE supplies 302HQ stainless steel cold heading wire in a 0.15–12 mm diameter range.

What is the difference between bright and soap-coated 302HQ wire?

Bright wire provides a clean metallic surface, while soap-coated wire includes a lubricating coating that can be considered for cold heading and forming processes where lubrication is required.

Is 302HQ suitable for cold heading?

302HQ is commonly selected for stainless steel cold heading because its material characteristics are suited to forming applications. The final suitability should be evaluated according to the fastener geometry, deformation level, tooling and forming process.

How should 302HQ wire be specified?

The main factors include material grade, diameter, tolerance, delivery condition, surface condition, applicable standard, mechanical requirements and intended fastener application.