5mm 302 JIS Standard Stainless Steel Spring Wire for Compression, Torsion and Extension Springs

Product Introduction

5mm 302 JIS Standard Stainless Steel Spring Wire is a cold-drawn stainless steel wire designed for compression springs, torsion springs, extension springs and other formed-wire components.

Manufactured from AISI 302 stainless steel, this spring wire combines a defined 5mm diameter with a controlled cold-drawn condition for spring manufacturing applications. The available diameter range is 0.15–12mm, allowing different wire sizes to be selected according to spring design and forming requirements.

302 stainless steel is an austenitic grade commonly used for spring wire. Its cold-working characteristics allow the wire to develop the mechanical properties required for different spring designs.

For applications requiring JIS or other international standards, the material grade, diameter, mechanical properties, surface condition and applicable standard should be confirmed according to the purchase specification.

Product Specifications

302 Stainless Steel Spring Wire

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

For spring manufacturing, the wire's final condition depends on factors including diameter, cold working, tensile strength and the required spring performance. Therefore, selecting 302 spring wire should be based on the complete spring design rather than diameter alone.

The 5mm diameter provides a defined starting specification for larger-diameter spring and wire-forming applications.

JIS Standard Stainless Steel Spring Wire

JIS requirements can be specified according to the customer's purchasing specification and application requirements.

When ordering 5mm 302 stainless steel spring wire, buyers should confirm:

• Material grade

• Wire diameter

• Applicable JIS standard

• Tensile strength or wire condition

• Surface condition

• Coil or spool requirements

• Quantity

• Inspection requirements

For international projects, the applicable standard should be clearly stated in the purchase order to avoid differences between material designations and mechanical requirements.

5mm Wire Diameter

The nominal wire diameter of this product is 5mm.

Wire diameter directly affects spring geometry and should be considered together with:

• Mean coil diameter

• Number of active coils

• Spring length

• Working load

• Deflection

• Spring index

• Forming method

For customized spring-wire requirements, the required diameter and mechanical properties should be confirmed before production.

Diameter Range: 0.15–12mm

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

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

The required diameter can be selected according to the customer's spring drawing, production equipment and forming requirements.

Applications

Compression Springs

5mm 302 stainless steel spring wire can be used for compression spring manufacturing where the specified material grade, diameter and mechanical properties are suitable for the spring design.

Typical applications include industrial equipment, machinery, hardware assemblies and stainless steel spring components.

Torsion Springs

The wire can be formed into torsion springs for applications where the spring is designed to work through rotational loading.

For torsion spring production, wire diameter, coil diameter, leg configuration and required working torque should be considered together when selecting the wire specification.

Extension Springs

302 stainless steel spring wire can also be used for extension spring production.

The required wire condition should be selected according to the spring dimensions, working load, extension range and forming process.

Wire Forms and Hardware

The 5mm wire can also be processed into various formed-wire components, including:

• Wire Forms

• Hooks

• Clips

• Brackets

• Retaining Components

• Fasteners

• Industrial Hardware

Product Advantages

302 Stainless Steel Material

AISI 302 provides a commonly used stainless steel material option for spring manufacturing and cold wire forming.

5mm Defined Diameter

The 5mm diameter provides a clear starting specification for spring designs requiring a larger wire size.

JIS Standard Option

The product can be specified according to JIS requirements when required by the customer's project or purchasing specification.

Cold-Drawn Manufacturing

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

Multiple Diameter Options

The available diameter range of 0.15–12mm allows different sizes of stainless steel spring wire to be selected for various spring and wire-forming applications.

Quality Control and Inspection

Quality control for stainless steel spring wire can include:

• Chemical Composition Verification

• Wire Diameter Inspection

• Surface Inspection

• Tensile Strength Testing

• Dimensional Inspection

• Coil or Spool Weight Verification

• Material Test Certificate

• Inspection Report According to Order Requirements

For orders requiring JIS or other specific standards, inspection requirements can be confirmed according to the applicable purchase specification.

Applicable Standards

Stainless steel spring wire can be supplied according to applicable international standards specified by the customer.

For spring-wire applications, ASTM A313/A313M is one commonly referenced specification for stainless steel round spring wire. The current ASTM listing is A313/A313M-18(2025), covering austenitic, austenitic-ferritic and age-hardenable stainless steel round spring wire. The specification also addresses chemical composition, tensile strength and mechanical tests.

For JIS-based purchasing requirements, the exact JIS designation and edition should be confirmed in the purchase order before production.

Packaging and Supply

5mm 302 stainless steel spring wire can be supplied in coils or spools according to the customer's production and handling requirements.

Packaging specifications can be confirmed according to:

• Coil or Spool Type

• Coil Weight

• Wire Diameter

• Surface Condition

• Order Quantity

• Customer Handling Requirements

How to Specify 5mm 302 Spring Wire

For accurate purchasing and technical confirmation, it is recommended to provide the complete specification rather than only the product name.

A typical specification includes:

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

For example:

AISI 302 + 5mm + JIS Standard + Bright Surface + Required Mechanical Properties + Required Quantity

Providing these parameters helps the supplier confirm the appropriate wire condition for compression, torsion or extension spring production.

Frequently Asked Questions

What is 5mm 302 stainless steel spring wire used for?

5mm 302 stainless steel spring wire can be used for compression springs, torsion springs, extension springs, wire forms, clips, hooks and other industrial spring components.

What diameter range is available?

TOPONE supplies stainless steel spring wire in diameters from 0.15mm to 12mm. The nominal diameter of this product is 5mm.

Is 302 stainless steel suitable for spring manufacturing?

AISI 302 is a commonly used stainless steel grade for spring wire. The appropriate wire condition should be selected according to spring geometry, mechanical requirements, forming process and service conditions.

Can the 5mm wire be supplied to JIS requirements?

JIS requirements can be confirmed according to the customer's purchase specification. The exact standard designation, material grade and mechanical requirements should be specified before production.

Can 5mm 302 wire be used for compression and torsion springs?

Yes. The wire can be considered for compression and torsion spring applications when the selected material condition and mechanical properties match the spring design.

What information is needed when ordering 302 spring wire?

Buyers should provide the material grade, wire diameter, applicable standard, surface condition, tensile strength or wire condition, supply form and required quantity.

Can the wire be supplied in coils or spools?

Yes. Coil or spool packaging can be specified according to the wire diameter, production equipment and customer requirements.