Product Specification

304/304L Stainless Steel Spring Wire 0.15–12mm for Spring Forming

Product Introduction

TOPONE 304/304L stainless steel spring wire is a cold-drawn round wire designed for spring manufacturing and formed-wire applications.

Made from AISI 304 / SUS 304 and 304L stainless steel, the wire is available in a 0.15–12mm diameter range. Bright and soap-coated surface options are available for different spring-forming and processing requirements.

304 and 304L are commonly selected for stainless steel spring applications where material corrosion resistance, forming requirements and service conditions need to be considered together.

The appropriate wire specification should be determined according to the spring design, wire diameter, mechanical properties, surface condition, applicable standard and working environment.

Product Specifications

Technical Note: Tensile strength, hardness, dimensional tolerance and other mechanical properties should be confirmed according to the selected diameter, applicable standard and spring design. A single mechanical value should not be applied to the complete 0.15–12mm diameter range.

304/304L Stainless Steel Spring Wire for Different Spring Types

Compression Springs

304/304L spring wire can be used for compression spring production where the required wire diameter, spring index, mechanical properties and working environment are properly specified.

Extension Springs

For extension springs, the wire specification should be selected together with the required tensile properties, spring dimensions and forming process.

Torsion Springs

Torsion spring applications require consideration of wire diameter, forming condition, spring geometry and required mechanical performance.

Wire Forms

The wire can also be used for retaining rings, clips and other formed-wire components when the material and mechanical condition meet the application requirements.

Surface Options

Bright Surface

Bright stainless steel spring wire is suitable for applications where a clean metallic surface is required or where the customer's forming process does not require a soap-coated surface.

Soap-Coated Surface

Soap-coated wire provides a lubricated surface condition that can be considered for cold forming and spring coiling processes.

The appropriate surface should be selected according to the forming equipment, tooling, lubrication requirements and final application.

Product Advantages

304/304L Stainless Steel Material

AISI 304 / SUS 304 and 304L provide commonly used stainless steel options for industrial spring and wire-forming applications.

Material selection should take into account corrosion exposure, forming requirements, mechanical properties and service conditions.

0.15–12mm Diameter Range

TOPONE supplies 304/304L stainless steel spring wire in diameters from 0.15mm to 12mm, covering fine-wire and larger industrial spring applications.

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

Cold-Drawn Manufacturing Process

Cold drawing is used to control wire diameter and mechanical condition according to the specified product requirements.

For technical applications, the final mechanical properties should be checked against the applicable material standard or customer specification.

Multiple Surface Conditions

Bright and soap-coated surfaces provide different options for spring forming, lubrication and final surface requirements.

Specification-Based Supply

The wire can be specified according to material grade, diameter, tolerance, surface condition, mechanical properties, applicable standard, coil dimensions and packaging requirements.

This specification-based approach helps buyers define the material according to the actual spring manufacturing process rather than selecting only by product grade.

How to Select 304/304L Stainless Steel Spring Wire?

1. Confirm the Material Grade

Specify AISI 304 / SUS 304 or 304L according to the required material standard and application.

2. Confirm the Wire Diameter

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

For precision springs, the required diameter tolerance should also be confirmed.

3. Define Mechanical Requirements

Tensile strength, hardness and spring temper can affect wire forming and finished spring performance.

The required mechanical properties should be determined according to the selected diameter, spring design and applicable standard.

4. Select the Surface

Choose bright or soap-coated wire according to the forming equipment, tooling and lubrication requirements.

5. Confirm the Spring Type

Specify whether the wire will be used for:

• Compression springs

• Extension springs

• Torsion springs

• Retaining components

• Wire forms

• Customized spring components

6. Check the Working Environment

Consider moisture, corrosion exposure, temperature, mechanical loading and maintenance requirements when selecting the material and mechanical condition.

Quality & Specification Control

For stainless steel spring wire, quality evaluation should be based on measurable technical specifications.

Relevant inspection and control items may include:

• Material grade

• Chemical composition

• Wire diameter

• Diameter tolerance

• Surface condition

• Tensile strength

• Hardness or mechanical condition

• Coil dimensions

• Packaging condition

• Material traceability

For projects with strict dimensional or mechanical requirements, the customer's technical drawing and applicable material standard should be used as the primary reference.

Customized Supply

TOPONE can discuss customized stainless steel spring wire requirements based on:

• Material grade

• Wire diameter

• Diameter tolerance

• Surface condition

• Tensile strength

• Hardness / spring temper

• Applicable standard

• Coil or spool requirements

• Packaging

• Spring application

For precision spring projects, buyers are recommended to provide a technical drawing or detailed material specification before production.

Buyer Specification Checklist

Providing these details allows the required stainless steel spring wire specification to be defined more clearly before quotation and production.

FAQ

What is 304/304L stainless steel spring wire?

304/304L stainless steel spring wire is a cold-drawn round wire used for spring manufacturing and wire-forming applications. It is available in different diameters, mechanical conditions and surface finishes according to the required specification.

What is the diameter range?

TOPONE supplies this product range from 0.15mm to 12mm. The exact diameter and tolerance should be confirmed according to the spring design and applicable standard.

What surface finishes are available?

The main options are bright and soap coated. The appropriate surface depends on the forming process, tooling and lubrication requirements.

What types of springs can be made from 304/304L wire?

Typical applications include compression springs, extension springs, torsion springs and various formed-wire components, subject to the required mechanical properties and application conditions.

What standards can be followed?

The wire can be specified according to applicable JIS, EN 10270-3, ASTM, DIN, GB or customer-specific requirements. The exact standard and mechanical requirements should be confirmed before production.

What information should I provide for a quotation?

Provide the material grade, wire diameter, tolerance, surface condition, mechanical requirements, spring type, applicable standard, quantity and packaging requirements. A technical drawing is recommended for precision spring applications.

Technical Inquiry

For a 304/304L stainless steel spring wire inquiry, please provide:

Grade + Diameter + Surface + Mechanical Requirement + Standard + Quantity + Application

For example:

SUS 304 + 2.0mm + Soap Coated + Spring Temper + EN 10270-3 + 1,000kg + Compression Spring