Product Specification

0.32mm 302 Stainless Steel Spring Wire for Precision Springs

Product Introduction

0.32mm 302 Stainless Steel Spring Wire is designed for manufacturers producing small springs, precision wire forms, clips, hooks, and other components requiring a fine stainless steel spring wire.

Manufactured from AISI 302 stainless steel, the wire is suitable for spring applications where material grade, wire diameter, mechanical condition, and surface finish need to be controlled according to the finished component design.

The featured diameter is 0.32mm, with other stainless steel spring wire sizes available according to material grade, delivery condition, surface requirements, and application.

Bright and soap-coated surface options can be selected according to the subsequent forming process and production equipment.

For customized orders, customers can specify wire diameter, tolerance, tensile strength, surface condition, material standard, coil weight, and other technical requirements.

Product Specifications

The actual tolerance, coil weight, mechanical properties and delivery condition should be confirmed according to the production specification and order.

Why Choose 0.32mm 302 Stainless Steel Spring Wire?

1. AISI 302 Stainless Steel

AISI 302 is an austenitic stainless steel grade commonly used for spring wire and cold-worked components.

Its material characteristics make it suitable for applications requiring stainless steel spring wire with a combination of corrosion resistance and spring-forming capability.

For environments involving high chloride concentrations, marine exposure, or specific chemicals, the appropriate stainless steel grade should be evaluated according to the actual service conditions.

2. 0.32mm Fine Wire Diameter

The 0.32mm diameter is suitable for relatively small springs and fine wire components where the wire size is an important part of the finished design.

For small spring production, manufacturers should consider more than diameter alone. Important factors include:

• Spring type

• Mean coil diameter

• Free length

• Working load

• Working deflection

• Number of active coils

• Required cycle life

• Operating temperature

• Wire condition

These parameters should be considered together when selecting the appropriate spring wire.

3. Controlled Diameter Tolerance

The listed diameter tolerance is ±0.008mm, subject to confirmation for the actual production condition.

For fine spring wire, diameter control is important because the wire diameter directly affects the geometry and mechanical behavior of the finished spring.

For production requiring tighter dimensional control, the required tolerance should be agreed before manufacturing.

4. Bright and Soap-Coated Surface Options

Different surface conditions can be selected according to the production process.

Bright Surface

Suitable for applications where the wire remains visible or where a clean metallic appearance is required.

Soap-Coated Surface

Can be considered when lubrication is required during subsequent spring forming or wire processing.

The appropriate surface should be selected according to the forming equipment, production speed, lubrication system, and finished-product requirements.

Typical Applications

Precision Springs

0.32mm 302 stainless steel spring wire can be considered for:

• Small compression springs

• Extension springs

• Torsion springs

• Contact springs

• Precision springs

• Small mechanical springs

The final suitability should be evaluated according to the spring design and working conditions.

Wire Forms

The fine wire diameter can also be used for customized wire-formed components such as:

• Clips

• Hooks

• Retaining components

• Small frames

• Wire supports

• Formed wire parts

Small Hardware Components

Depending on the design and forming requirements, the wire can be used for selected small metal components where stainless steel material and fine wire dimensions are required.

Spring Wire Selection Guide

Selecting 0.32mm spring wire requires consideration of the complete spring design.

Spring Type

Identify whether the finished component is a:

• Compression spring

• Extension spring

• Torsion spring

• Contact spring

• Custom wire form

Different spring designs impose different requirements on the wire and forming process.

Wire Diameter

The featured size is 0.32mm. Diameter tolerance should be determined according to the spring drawing and production equipment.

Material Grade

302 stainless steel can be considered for general stainless steel spring applications. For more aggressive corrosion environments, alternative grades such as 316/316L may need to be evaluated.

Wire Condition

The required spring temper or other delivery condition should be selected according to the forming process and required mechanical properties.

Surface Condition

Bright or soap-coated wire can be selected according to whether the wire requires additional lubrication during spring forming.

Hard vs. Soft Stainless Steel Spring Wire

The wire condition should be selected according to the actual production process.

“Hard” or “soft” should not be used as the only purchasing specification. The actual tensile strength, hardness, elongation, and delivery condition should be confirmed.

Quality Control

For fine stainless steel spring wire, quality should be evaluated through measurable specifications.

Important inspection items include:

• Material grade

• Chemical composition

• Wire diameter

• Diameter tolerance

• Surface condition

• Tensile strength

• Hardness

• Elongation

• Coil weight

• Coil dimensions

• Batch identification

• Applicable material standard

For customized production, customers can provide the required wire specification, spring drawing, mechanical requirements, surface condition, and application environment for technical evaluation.

Packing & Supply

The 0.32mm 302 stainless steel spring wire can be supplied in coils or spools according to the customer's production equipment.

The current product information lists 10kg coils for this product. If a different coil weight or spool configuration is required, the packing specification should be confirmed before production.

For automated spring manufacturing, customers can also specify:

• Coil weight

• Spool dimensions

• Wire feeding requirements

• Inner/outer coil dimensions

• Labeling

• Special packing requirements

FAQ

What is 0.32mm 302 stainless steel spring wire?

It is AISI 302 stainless steel wire with a featured diameter of 0.32mm, designed for small springs, precision wire forms, clips, hooks, and related components.

Is 302 stainless steel suitable for spring applications?

Yes. 302 stainless steel is commonly used for stainless steel spring wire. The appropriate wire condition and mechanical properties should be selected according to the spring design and working conditions.

What is the tolerance of the 0.32mm wire?

The current product specification lists 0.32 ±0.008mm. The final tolerance should be confirmed according to the production specification and applicable standard.

What surface finishes are available?

Bright and soap-coated surface conditions can be supplied according to the customer's application and subsequent forming process.

What spring types can use 0.32mm wire?

Depending on the spring design and required mechanical properties, 0.32mm wire can be considered for compression, extension, torsion, contact, and other small spring configurations.

Can the wire diameter and tolerance be customized?

Yes. Diameter, tolerance, material condition, surface, mechanical properties, packing, and applicable standards can be discussed according to the customer's requirements.