0.5mm 302 Bright Stainless Steel Spring Wire | 0.15–12mm

Product Introduction

TOPONE 0.5mm 302 Bright Stainless Steel Spring Wire is manufactured from AISI 302 stainless steel for spring manufacturing, wire forming and selected industrial applications.

The featured product has a nominal diameter of 0.5mm, with a product-family diameter range of 0.15–12mm. The wire is available with a bright or soap-coated surface, allowing the surface condition to be selected according to the customer's forming process and subsequent processing requirements.

For the 0.5mm specification, the listed diameter tolerance is ±0.01mm, while the specified tensile strength is 1950–2200 MPa. These measurable parameters provide a technical reference for buyers evaluating the wire for spring production.

302 stainless steel is an austenitic stainless steel grade widely used for spring wire. ASTM A313/A313M covers applicable stainless steel round spring wire intended especially for spring manufacturing and includes requirements for chemical composition, tensile properties and mechanical testing. The applicable grade and condition should be confirmed according to the purchase specification.

Product Specifications

* Confirmed values should be based on the specific order specification, production condition and applicable standard.

Key Product Features

0.5mm Precision Spring Wire

The featured wire diameter is 0.5mm, with a listed tolerance of ±0.01mm.

For spring manufacturing, wire diameter directly affects spring geometry and should therefore be considered together with coil diameter, number of active coils, working load and forming equipment.

TOPONE also supplies this product family in diameters from 0.15–12mm, allowing buyers to select a size according to their spring design and production requirements.

302 Stainless Steel

AISI 302 is an austenitic stainless steel grade commonly used for spring wire. Cold working can increase its strength, which is an important consideration when selecting 302 wire for spring applications. Industry references also identify 302/1.4310 as a widely used spring-wire grade.

For procurement, the exact grade, mechanical condition and required tensile strength should be specified rather than using only the general term "stainless steel spring wire."

1950–2200 MPa Tensile Strength

The listed tensile strength for this 0.5mm wire is 1950–2200 MPa.

Tensile strength is an important parameter for spring wire, but it should not be considered independently. Spring geometry, forming method, required load, fatigue requirements and service conditions also affect final material selection.

Bright Surface

The bright surface provides a clearly defined surface condition for applications where the appearance and surface state of the wire are important.

The product can also be supplied with a soap-coated surface when the forming process requires a different surface condition.

Soap-Coated Option

Soap coating can be selected for applications where surface lubrication is relevant during spring coiling or wire forming.

The appropriate surface should be evaluated according to the customer's equipment, tooling, forming process and subsequent cleaning requirements.

Applications

Compression Springs

0.5mm 302 stainless steel spring wire can be considered for small-diameter compression springs where the specified diameter, tensile strength and material condition meet the spring design requirements.

Extension Springs

The wire can also be used for selected extension spring applications. Spring dimensions and required working load should be evaluated before material selection.

Torsion Springs

For torsion springs, wire diameter and tensile strength should be considered together with spring geometry and forming requirements.

Wire-Formed Components

302 stainless steel spring wire can also be considered for selected wire-forming components, clips, hooks and other formed wire parts where the material and mechanical condition are suitable.

Technical Selection Guide

When selecting 0.5mm 302 stainless steel spring wire, buyers should confirm the following parameters:

1. Material grade: 302

2. Wire diameter: 0.5mm

3. Diameter tolerance: ±0.01mm or required tolerance

4. Tensile strength: 1950–2200 MPa or required range

5. Surface: Bright or Soap Coated

6. Mechanical condition

7. Spring type

8. Spring dimensions

9. Applicable standard

10. Working environment

11. Coil or spool weight

12. Packaging requirements

A spring drawing or technical specification is recommended when the wire is intended for a customized spring application.

Quality Control

For industrial stainless steel spring wire, quality evaluation should be based on measurable parameters.

Material Verification

The supplied material should correspond to the agreed 302 stainless steel grade and relevant material specification.

Diameter Inspection

The wire diameter can be measured to verify the specified nominal diameter and tolerance.

For the featured product:

Nominal Diameter: 0.5mm
Listed Tolerance: ±0.01mm

Tensile Strength Testing

Tensile strength can be tested according to the applicable technical standard or purchase specification.

For this product:

Listed Tensile Strength: 1950–2200 MPa

Surface Inspection

The bright or soap-coated surface can be inspected according to the agreed surface requirements.

Coil and Spool Inspection

Coil or spool dimensions, weight and packaging condition can be checked before shipment according to the order specification.

Standards and Documentation

ASTM A313/A313M is a relevant specification for stainless steel round spring wire intended especially for spring manufacturing. It addresses material composition, tensile requirements and mechanical tests applicable to the specified wire.

The applicable standard should be confirmed according to the material grade, diameter, mechanical condition and customer's technical requirements.

Depending on the order, technical documentation may include:

• Material specification

• Chemical composition report

• Diameter inspection record

• Tensile test report

• Surface inspection

• Mill Test Certificate (MTC), when required

FAQ

What is 0.5mm 302 stainless steel spring wire?

It is AISI 302 stainless steel wire with a nominal diameter of 0.5mm, supplied for selected spring manufacturing and wire-forming applications.

What diameter range is available?

The available product-family diameter range is 0.15–12mm, with 0.5mm as the featured specification.

What is the tensile strength of the 0.5mm wire?

The listed tensile strength is 1950–2200 MPa. The final required tensile range should be confirmed according to the production condition and customer's specification.

Is the wire available with a bright surface?

Yes. The product is available with a bright surface, and a soap-coated surface can also be supplied according to the forming requirements.

Can 302 stainless steel wire be used for springs?

Yes. 302 stainless steel is widely used for stainless steel spring wire. Final suitability depends on diameter, mechanical condition, spring design and service requirements.

What information should I provide when requesting a quotation?

Provide the material grade, diameter, tensile strength, surface finish, spring type, applicable standard, quantity and packaging requirements. A technical drawing is helpful for customized spring applications.

Stainless Steel Spring Wire Selection

Selecting spring wire should be based on the complete specification rather than material grade alone.

For 0.5mm 302 bright stainless steel spring wire, the key selection factors are:

Material → Diameter → Tolerance → Tensile Strength → Surface → Spring Type → Working Conditions → Standard

This specification-based approach helps buyers match the wire with their actual spring manufacturing process.