Product Specification

1.5mm 302 Stainless Steel Spring Wire for Precision Forming

Product Introduction

1.5mm 302 Bright Stainless Steel Spring Wire is a cold-drawn stainless steel wire designed for spring manufacturing, precision wire forming and industrial components.

Made from AISI 302 / SUS302 stainless steel, this spring wire is suitable for applications requiring a defined wire diameter, controlled mechanical properties and a bright surface finish.

The nominal diameter of this product is 1.5mm, with a wider available diameter range of 0.15–12mm. Different diameters, surface conditions and mechanical properties can be selected according to spring design, forming equipment and final application requirements.

For precision forming applications, wire diameter, tensile strength, surface condition, spring geometry and forming process should be considered together when selecting the appropriate wire specification.

Technical Specifications

Note: Final tensile strength, dimensional tolerance and mechanical condition should be confirmed according to the selected diameter, applicable standard and purchase specification.

Why Choose AISI 302 Stainless Steel Spring Wire?

AISI 302 for Spring Manufacturing

AISI 302 is an austenitic stainless steel grade widely used for stainless steel spring wire. Cold working can increase the strength of the material, making it suitable for different spring and wire-forming requirements.

For spring production, the material grade is only one part of the specification. The required wire condition should also be matched with:

• Wire diameter

• Tensile strength

• Spring dimensions

• Working load

• Deflection requirements

• Forming process

• Service environment

This approach helps manufacturers select a wire specification based on actual component requirements.

1.5mm Diameter for Precision Forming

The 1.5mm nominal diameter provides a defined wire size for spring and precision wire-forming applications.

Wire diameter directly affects the geometry of a finished spring. Therefore, buyers should confirm the required diameter and tolerance according to the spring drawing or component specification.

For customized production, the required diameter, tolerance, tensile strength and surface condition can be specified before production.

Bright Surface for Wire Forming

The bright surface provides a clean metallic appearance and a defined surface condition for applications where wire finish is important.

Surface condition should also be considered in relation to the customer's forming equipment, tooling, lubrication method and subsequent processing.

For applications where lubrication during spring coiling is important, a soap-coated surface can also be considered according to production requirements.

Diameter Range: 0.15–12mm

TOPONE supplies stainless steel spring wire in diameters from 0.15–12mm.

This range covers fine stainless steel wire as well as larger-diameter spring and industrial wire-forming applications.

These ranges are general application references. The final diameter should be determined according to the component drawing, spring design, required load and forming process.

Applications

Compression Springs

302 stainless steel spring wire can be used to manufacture compression springs for mechanical and industrial components.

The appropriate wire diameter and mechanical condition should be selected according to spring load, free length, coil diameter and working deflection.

Extension and Torsion Springs

The wire can also be used for extension springs, torsion springs and other elastic components where stainless steel spring wire is required.

Precision Wire Forms

The 1.5mm wire can be processed into formed-wire components such as:

• Clips

• Hooks

• Retaining components

• Brackets

• Wire forms

• Industrial hardware

Precision Mechanical Components

302 stainless steel spring wire can be considered for components requiring a defined wire diameter, stainless steel material and controlled mechanical condition.

Product Advantages

Defined 1.5mm Diameter

The 1.5mm nominal diameter provides a clear starting specification for spring design and precision wire forming.

0.15–12mm Product Range

The wider 0.15–12mm range allows manufacturers to select different wire sizes for fine, medium and larger spring applications.

AISI 302 Material

AISI 302 is a commonly used stainless steel grade for spring wire and cold-worked wire applications.

Bright Surface

The bright finish provides a clean metallic surface for applications where wire appearance and surface condition are important.

Cold-Drawn Manufacturing

Cold drawing is used to control wire diameter and develop the mechanical condition required for spring-wire applications.

Multiple Specification Options

The product specification can be defined according to:

• Grade

• Diameter

• Diameter tolerance

• Tensile strength

• Surface condition

• Applicable standard

• Coil or spool format

• Coil weight

• Packaging requirements

Quality Control and Inspection

For stainless steel spring wire, product quality should be evaluated using measurable parameters rather than appearance alone.

Depending on the order specification, inspection can include:

Material Verification

Chemical composition can be checked against the specified stainless steel grade, with material documentation provided according to order requirements.

Dimensional Inspection

Wire diameter and dimensional tolerance can be inspected to verify compliance with the agreed specification.

Mechanical Testing

Tensile strength and other required mechanical properties can be tested according to the applicable standard and product specification.

Surface Inspection

The wire surface can be inspected for surface condition and visible defects according to the agreed quality requirements.

Documentation

Material Test Certificates and inspection reports can be provided when required by the purchase specification.

Applicable Standards

For stainless steel spring wire, ASTM A313/A313M is an important reference standard covering stainless steel round spring wire intended for spring manufacturing.

Depending on the customer's market and technical requirements, specifications can also reference AISI, EN, DIN, JIS or equivalent standards.

The exact standard, material grade, diameter, tensile strength and inspection requirements should be confirmed before production.

How to Select 302 Stainless Steel Spring Wire

When purchasing stainless steel spring wire, providing only the material grade and diameter may not be sufficient.

A complete purchasing specification can include:

Grade + Diameter + Surface + Tensile Strength / Temper + Standard + Quantity

For example:

AISI 302 + 1.5mm + Bright Surface + Required Tensile Strength + ASTM A313 + Required Quantity

For precision spring manufacturing, buyers should also consider:

• Spring type

• Spring diameter

• Working load

• Working deflection

• Number of coils

• Forming equipment

• Service environment

This information helps determine whether the selected wire specification is suitable for the actual manufacturing process.

Packaging and Supply

302 stainless steel spring wire can be supplied in coils or spools according to wire diameter, production equipment and customer requirements.

The supply specification can include:

• Coil or spool type

• Coil weight

• Wire diameter

• Surface finish

• Material grade

• Tensile strength

• Packaging method

• Applicable standard

Customized packaging can be discussed according to the customer's pay-off equipment and production process.

Frequently Asked Questions

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

It is commonly used for compression springs, extension springs, torsion springs, precision wire forms, clips and other formed-wire components.

What diameter range is available?

The product family is available from 0.15–12mm. The nominal diameter of this product is 1.5mm.

What is the material of 302 spring wire?

The material is AISI 302 / SUS302 stainless steel, also identified as UNS S30200 and EN 1.4310.

Is the surface bright?

Yes. This product is specified with a bright surface. Soap-coated surface options can also be considered according to forming and lubrication requirements.

What information should I provide when requesting a quotation?

It is recommended to provide the material grade, wire diameter, surface condition, required tensile strength or temper, applicable standard, quantity and packaging requirements.

Can 302 stainless steel spring wire be customized?

Yes. Diameter, tolerance, mechanical condition, surface finish, coil or spool format and packaging can be specified according to the customer's technical requirements.

Technical Inquiry

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

Material Grade + Diameter + Surface + Tensile Strength / Temper + Standard + Quantity

For precision forming projects, adding the spring drawing or component specification can help determine the appropriate wire condition and production requirements.