Product Specification

302 Stainless Steel Spring Wire 0.15–12mm for Precision Springs

Product Introduction

TOPONE 302 stainless steel spring wire is a spring-tempered stainless steel wire designed for spring manufacturing, wire forming and precision metal components.

Made from AISI 302 / SUS 302 stainless steel, the wire is supplied in a 0.15–12mm diameter range with different surface conditions, including bright and soap-coated surfaces.

The spring-tempered condition is selected according to the mechanical requirements of the finished spring. Wire diameter, temper condition, surface and applicable standard should be specified together when selecting material for precision spring production.

For buyers comparing 302 spring wire, the appropriate specification should be determined according to the spring design, forming process, required mechanical properties and working environment.

Product Specifications

Technical Note: Mechanical properties such as tensile strength and hardness should be confirmed according to the selected diameter, spring temper and applicable standard. These values should not be treated as identical across the complete 0.15–12mm range.

302 Stainless Steel Spring Wire for Spring Manufacturing

Compression Springs

302 spring-tempered wire can be used for compression springs where the wire diameter, temper condition and spring geometry are defined according to the finished component requirements.

Extension Springs

For extension springs, material selection should consider wire diameter, spring dimensions, forming condition and the mechanical requirements of the finished spring.

Torsion Springs

302 stainless steel spring wire can also be considered for torsion spring production. The required wire specification should be evaluated together with the spring geometry and forming process.

Precision Wire Forms

The wire can be used for clips, retaining components and other formed-wire parts where stainless steel material and spring-tempered properties are required.

Surface Options

Bright Surface

Bright 302 stainless steel spring wire provides a clean metallic surface and can be selected for applications where the finished wire appearance and surface condition are important.

Soap-Coated Surface

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

The suitable surface should be selected according to the customer's forming equipment, tooling and lubrication requirements.

Product Advantages

302 Stainless Steel Material

AISI 302 / SUS 302 is a commonly specified stainless steel grade for spring wire applications.

When selecting 302 wire, buyers should consider the required mechanical condition, spring design, corrosion exposure and processing requirements rather than choosing the material grade alone.

Spring-Tempered Condition

Spring temper provides a defined mechanical condition for spring-forming applications.

The required temper should be matched with the finished spring design and the applicable material specification.

0.15–12mm Diameter Range

TOPONE supplies 302 stainless steel spring wire from 0.15mm to 12mm, covering fine-wire and larger spring applications.

For precision components, the nominal diameter and required dimensional tolerance should be specified together.

Bright and Soap-Coated Surfaces

Different surface conditions are available for different spring-forming and processing requirements.

Bright wire can be considered when surface appearance is important, while soap-coated wire can be selected when additional surface lubrication is required during forming.

Specification-Based Production

The product can be specified according to:

• Material grade

• Wire diameter

• Diameter tolerance

• Spring temper

• Surface condition

• Applicable standard

• Coil or spool requirements

• Packaging requirements

This allows the wire specification to be matched with the actual spring manufacturing process.

How to Select 302 Stainless Steel Spring Wire?

1. Confirm the Material Grade

Specify AISI 302 / SUS 302 according to the required material standard.

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 the Spring Temper

Spring-tempered wire should be selected according to the required mechanical condition of the finished spring.

The required mechanical properties should be checked against the selected diameter and applicable standard.

4. Select the Surface Condition

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

5. Confirm the Spring Type

Specify the intended application:

• Compression springs

• Extension springs

• Torsion springs

• Wire forms

• Retaining components

• Customized spring parts

6. Consider the Working Environment

For industrial spring applications, consider moisture, corrosion exposure, temperature, cyclic loading and other service conditions when determining the material and wire specification.

Quality & Specification Control

For 302 stainless steel spring wire, product quality should be evaluated using measurable technical requirements rather than general quality descriptions.

Key inspection and specification items may include:

• Material grade

• Chemical composition

• Wire diameter

• Diameter tolerance

• Surface condition

• Tensile strength

• Hardness or spring temper

• Coil dimensions

• Packaging

• Material traceability

For precision spring applications, the customer's drawing and applicable material standard should be used as the primary technical reference.

Buyer Specification Checklist

Providing these specifications helps define the required 302 spring wire more accurately before quotation and production.

FAQ

What is 302 stainless steel spring wire?

302 stainless steel spring wire is a spring-tempered stainless steel wire used for spring manufacturing and formed-wire applications. It can be supplied in different diameters and surface conditions according to the required specification.

What is the diameter range of 302 spring wire?

TOPONE supplies this product range from 0.15mm to 12mm. The exact diameter tolerance should be confirmed according to the applicable standard or customer drawing.

What surface finishes are available?

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

What is spring-tempered stainless steel wire?

Spring-tempered wire is supplied in a controlled mechanical condition intended for spring-forming applications. The required mechanical properties should be specified according to the wire diameter and applicable standard.

What springs can be manufactured from 302 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 information should be provided when ordering?

Buyers should provide the material grade, diameter, tolerance, spring temper, surface condition, applicable standard, quantity, packaging requirements and application. A technical drawing is recommended for precision spring components.

Technical Inquiry

For a 302 stainless steel spring wire inquiry, please provide:

Grade + Diameter + Temper + Surface + Standard + Quantity + Application

Example:

SUS 302 + 2.0mm + Spring Tempered + Soap Coated + ASTM / Customer Specification + 1,000kg + Compression Spring