Product Specification

1.5mm AISI 302 Bright Stainless Steel Spring Wire

Product Introduction

The 1.5mm AISI 302 bright stainless steel spring wire is a cold-drawn stainless steel wire designed for spring manufacturing, wire forming and other applications requiring a defined wire diameter and stainless steel material.

AISI 302, also identified as SUS302 and EN 1.4310, is an austenitic stainless steel grade commonly used for spring wire and formed-wire components. Its suitability for spring applications depends on the selected mechanical condition, wire diameter, spring design and processing requirements.

This product has a nominal diameter of 1.5 mm and a bright surface, making it suitable for applications where a clean wire surface is required during spring forming or in the finished component.

TOPONE stainless steel wire can be supplied in a wider 0.15–12 mm diameter range, with the final diameter tolerance, mechanical condition and applicable standard confirmed according to the order specification.

Product Specifications

The final tensile strength, dimensional tolerance and mechanical condition should be confirmed according to the selected diameter and applicable material standard.

Why AISI 302 for Spring Wire?

AISI 302 is an austenitic stainless steel grade widely used in stainless steel spring wire applications.

For spring manufacturing, the material grade is only one part of the specification. The final performance of a spring is also affected by:

• Wire diameter

• Tensile strength

• Cold-working condition

• Spring index

• Coil diameter

• Number of active coils

• Forming process

• Working temperature

• Service environment

Therefore, 302 stainless steel spring wire should be selected according to the complete spring design rather than material grade alone.

1.5mm Diameter for Spring Manufacturing

The 1.5mm nominal diameter provides a defined wire cross-section for spring production and wire forming.

The required diameter should be determined from the spring drawing or component specification. When purchasing spring wire, buyers should specify both the nominal diameter and the required dimensional tolerance.

For customized production, the following information can be provided:

• Nominal wire diameter

• Diameter tolerance

• Required tensile strength

• Spring type

• Spring dimensions

• Surface condition

• Applicable standard

• Required quantity

These parameters help match the wire specification with the customer's actual forming process.

Bright Surface Stainless Steel Spring Wire

The bright surface is suitable for applications where the wire surface needs to maintain a clean metallic appearance.

Surface condition is also relevant to spring manufacturing because the wire passes through guides, dies and forming equipment during coiling.

When selecting a bright stainless steel spring wire, manufacturers should consider:

• Required surface appearance

• Forming equipment

• Tooling condition

• Processing speed

• Subsequent cleaning or finishing

• Finished-part appearance

Bright and soap-coated spring wire should therefore be selected according to the actual manufacturing process rather than treated simply as different appearance options.

Spring Applications

Compression Springs

302 stainless steel spring wire can be formed into compression springs used in mechanical assemblies, equipment and industrial components.

The required wire diameter and mechanical condition should be determined according to the spring load, dimensions and design requirements.

Extension Springs

Extension springs can be produced from 302 stainless steel spring wire when the selected material condition and diameter meet the required spring design.

Typical considerations include spring geometry, initial tension, working load and operating environment.

Torsion Springs

For torsion springs, wire diameter and material condition need to be considered together with the spring arm dimensions, coil diameter and required torque.

Wire Forms

The 1.5mm wire can also be processed into clips, hooks, retaining components and other formed-wire products where stainless steel material is required.

Product Advantages

1. AISI 302 Stainless Steel

AISI 302 provides a commonly used stainless steel grade for spring wire and formed-wire applications.

2. 1.5mm Defined Diameter

The 1.5mm nominal diameter is suitable for spring designs and wire-forming applications requiring a specific wire cross-section.

3. Bright Surface

The bright surface provides a clean metallic finish and can be selected according to the forming process and finished-component requirements.

4. 0.15–12mm Production Range

TOPONE's stainless steel wire production covers diameters from 0.15 to 12 mm, allowing different spring wire specifications to be selected according to application requirements.

5. Multiple Applicable Standards

Specifications can be discussed according to AISI, ASTM, EN, DIN, JIS or GB requirements, with the applicable standard confirmed before production.

Quality Control

For stainless steel spring wire, measurable technical specifications are more useful than general descriptions of product quality.

Typical quality-control items include:

• Stainless steel grade

• Chemical composition

• Wire diameter

• Diameter tolerance

• Tensile strength

• Mechanical condition

• Surface condition

• Coil dimensions

• Packaging identification

• Applicable standard

For orders with specific technical requirements, material certificates and test documentation can be discussed according to the agreed specification.

302 Stainless Steel Spring Wire Selection Guide

Before selecting 1.5mm 302 stainless steel spring wire, manufacturers should confirm the following parameters.

Material Grade

Confirm whether AISI 302 / SUS302 is specified by the spring drawing, purchasing standard or engineering requirement.

Wire Diameter

Confirm the required nominal diameter and tolerance. For this product, the nominal diameter is 1.5 mm.

Mechanical Condition

Spring wire should be supplied in the mechanical condition required by the spring design and applicable standard.

Surface Condition

Choose bright or other specified surface conditions according to the forming process and finished-component requirements.

Spring Type

Specify whether the wire will be used for:

• Compression springs

• Extension springs

• Torsion springs

• Wire forms

• Clips or retaining components

Working Environment

Consider moisture, temperature, chemical exposure and mechanical loading when confirming the stainless steel grade.

302 vs. 304 Stainless Steel Spring Wire

Both 302 and 304 are austenitic stainless steel grades used in stainless steel wire applications, but the appropriate grade should be selected according to the required material specification and application.

The choice between 302 and 304 should be based on the customer's drawing, purchasing standard, mechanical requirements and service environment rather than assuming one grade is universally better.

OEM Stainless Steel Spring Wire

For customized stainless steel spring wire requirements, buyers can provide a technical drawing, existing material specification or purchasing standard.

Recommended information includes:

• Grade

• Diameter

• Diameter tolerance

• Tensile strength

• Surface condition

• Spring type

• Applicable standard

• Coil or spool requirement

• Packaging requirement

• Quantity

• Application

TOPONE can then evaluate the required wire specification according to the intended spring manufacturing process.

FAQ

What is 1.5mm AISI 302 stainless steel spring wire used for?

It can be used for compression springs, extension springs, torsion springs and various formed-wire components, provided the selected mechanical condition matches the application.

Is AISI 302 the same as SUS302?

AISI 302 and SUS302 are commonly used designations for the same stainless steel grade family. The exact material requirements should still be confirmed against the applicable standard.

What is the surface of this 1.5mm spring wire?

This product has a bright surface. Other surface conditions can be discussed according to the manufacturing process.

What is the available diameter range?

The stainless steel wire production range is 0.15–12 mm, while this specific product is the 1.5mm diameter specification.

Can 302 stainless steel wire be used for torsion springs?

Yes. 302 stainless steel spring wire can be considered for torsion spring applications when the wire diameter, mechanical condition and spring design meet the required specifications.

What information is required for a spring wire quotation?

The most useful information includes grade, diameter, quantity, tensile requirement, surface condition, applicable standard and spring application.