Product Specification

302 Stainless Steel Spring Wire | 0.15–12 mm

Product Introduction

302 Stainless Steel Spring Wire is an austenitic stainless steel wire designed for spring manufacturing and other wire-forming applications requiring defined mechanical properties.

This product is available in a diameter range of 0.15–12 mm, with 1.0 mm representing the referenced product specification. The actual wire diameter, tensile strength, surface condition, and material condition should be selected according to the spring design and manufacturing process.

For spring applications, wire selection should consider more than diameter alone. Stainless steel grade, wire condition, tensile strength, forming process, spring geometry, and service environment all influence the suitability of the wire for a particular component.

Technical Parameters

Actual tensile strength, elongation, diameter tolerance, surface condition, and applicable standard should be confirmed according to the specific grade, diameter, and spring specification.

What Is 302 Stainless Steel Spring Wire?

302 stainless steel spring wire is stainless steel wire manufactured for applications where the wire is formed into springs or other components requiring specific mechanical characteristics.

Unlike annealed stainless steel wire, which is generally selected when a softer and more ductile condition is required for subsequent processing, spring wire is supplied in a material condition intended for spring applications.

The appropriate specification should be determined according to:

• Stainless steel grade

• Wire diameter

• Tensile strength

• Material condition

• Surface condition

• Spring design

• Forming method

• Operating environment

302 Stainless Steel Grade

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

For spring manufacturing, the selected grade should be evaluated together with the required mechanical properties and manufacturing process. The grade alone does not define the complete spring-wire specification.

When the finished spring will operate in a specific environment, factors such as moisture, temperature, chemical exposure, cyclic loading, and contact conditions should also be considered during material selection.

Spring Wire Mechanical Properties

Spring applications require controlled mechanical properties because the wire is subjected to bending and elastic deformation during service.

Important specifications may include:

• Tensile strength

• Wire diameter

• Diameter tolerance

• Material condition

• Elongation

• Surface condition

The required tensile strength should not be assumed to be the same for every diameter. It should be confirmed according to the selected grade, wire size, applicable standard, and spring design.

For this reason, a spring wire specification should be defined by measurable parameters rather than a general statement such as “high strength.”

Diameter Range: 0.15–12 mm

The listed diameter range for this product is 0.15–12 mm.

The referenced product specification is 1.0 mm, while the broader range allows buyers to evaluate other wire sizes according to their spring or wire-forming requirements.

Diameter selection should consider:

• Spring dimensions

• Required load

• Spring geometry

• Forming equipment

• Coil diameter

• Number of active coils

• Required mechanical properties

• Operating conditions

For customized orders, the exact diameter and tolerance should be confirmed before production.

Applications

Compression Springs

302 stainless steel spring wire can be considered for compression spring manufacturing when the selected material condition and mechanical properties meet the spring design requirements.

Tension Springs

The wire can also be used for tension spring applications where stainless steel material and the required spring properties are specified.

Torsion Springs

For torsion spring production, wire diameter, spring geometry, forming process, and material condition should be evaluated together to determine whether the selected wire specification is suitable.

Small Wire Springs

Fine stainless steel spring wire can be used for smaller spring components where the required diameter and mechanical properties can be achieved within the applicable specification.

Wire-Formed Components

Depending on the material condition and forming process, stainless steel spring wire can also be used for selected formed-wire components requiring defined mechanical properties.

Product Advantages

302 Stainless Steel Grade

The product uses a defined AISI 302 stainless steel grade, providing a clear material specification for spring-wire procurement.

Spring-Wire Material Condition

The product is positioned as spring wire rather than annealed wire, making the material condition an important part of the product specification.

0.15–12 mm Diameter Range

The available range covers fine wire through larger wire sizes for different spring and wire-forming requirements.

Defined Mechanical Specifications

For spring applications, tensile strength, diameter tolerance, material condition, and other measurable properties can be specified according to the required application.

ISO Certification

The product information references ISO certification. The specific certificate and applicable quality-management scope should be confirmed according to the order and supplied documentation.

Customized Packaging

Coil and spool packaging can be selected according to the customer's production and handling requirements.

Spring Wire Quality Control

For stainless steel spring wire, quality control should focus on measurable parameters relevant to spring manufacturing.

Key inspection items may include:

• Material grade

• Chemical composition

• Wire diameter

• Diameter tolerance

• Tensile strength

• Elongation

• Surface condition

• Material condition

• Coil weight

• Packaging condition

For repeat orders, maintaining consistent grade, diameter, mechanical specification, and inspection requirements provides a clearer basis for controlling product consistency.

How to Select Stainless Steel Spring Wire

Spring-wire selection should start with the finished spring requirements.

A practical selection sequence is:

Spring Type → Material Grade → Wire Diameter → Material Condition → Tensile Strength → Spring Geometry → Operating Environment → Packaging

For example, a 1.0 mm wire used for a small compression spring may have different requirements from a 3.0 mm wire used for a larger industrial spring.

Therefore, diameter alone is not sufficient to determine whether a stainless steel spring wire is suitable.

302 Spring Wire vs. Annealed Stainless Steel Wire

302 stainless steel spring wire and annealed stainless steel wire serve different manufacturing purposes.

These two material conditions should not be used interchangeably without evaluating the manufacturing and performance requirements.

Frequently Asked Questions

What is 302 stainless steel spring wire?

302 stainless steel spring wire is stainless steel wire made from AISI 302 and supplied for spring manufacturing and selected wire-forming applications requiring defined mechanical properties.

What diameter range is available?

The specified diameter range is 0.15–12 mm. The referenced product specification is 1.0 mm.

Is 302 stainless steel spring wire the same as annealed stainless steel wire?

No. Spring wire and annealed wire represent different material conditions and are selected for different manufacturing requirements.

Can this wire be used for compression springs?

It can be considered for compression spring manufacturing when the grade, diameter, material condition, tensile strength, and other requirements are compatible with the spring design.

What factors should be specified when ordering spring wire?

Buyers should provide the stainless steel grade, wire diameter, diameter tolerance, tensile strength, material condition, surface condition, applicable standard, coil weight, and intended spring application.

Recommended Inquiry Specification

For technical evaluation, buyers can provide:

302 Grade + Wire Diameter + Diameter Tolerance + Material Condition + Tensile Strength + Surface + Standard + Coil Weight + Spring Type + Application

Providing the spring type and basic design requirements helps determine whether the selected wire specification is appropriate for the intended application.