Product Specification

3.0mm 302 Stainless Steel Spring Wire – Hard Temper

TOPONE supplies 3.0mm 302 stainless steel spring wire in hard temper, with a specified tensile strength range of 1450–1700 N/mm².

This wire is designed for spring manufacturing and wire-forming applications where a defined diameter, stainless steel grade and mechanical property range are required. The 3.0mm diameter provides a specific starting point for manufacturers selecting wire according to spring dimensions, forming equipment and working requirements.

For production use, the appropriate wire condition should be selected according to the spring design, forming process and required mechanical properties.

Product Specifications

Note: The 1450–1700 N/mm² tensile strength range applies to this specified 3.0mm hard wire configuration. Other diameters and tempers may have different mechanical properties and should be confirmed according to the applicable specification.

3.0mm 302 Stainless Steel Spring Wire

Hard Temper for Spring Manufacturing

This product is supplied in a hard condition with a tensile strength of 1450–1700 N/mm². The defined mechanical property range provides a reference for manufacturers evaluating the wire against their spring design and forming process.

When selecting spring wire, tensile strength should be considered together with wire diameter, spring dimensions, forming method and required working performance.

3.0mm Diameter for Controlled Spring Design

The 3.0mm wire diameter is suitable for spring designs requiring a larger wire cross-section than fine spring wire.

For engineering evaluation, manufacturers should consider:

• Wire diameter

• Spring outside and inside diameter

• Number of active coils

• Free length

• Required spring load

• Forming equipment

• Working temperature and environment

These parameters help determine whether 3.0mm 302 stainless steel spring wire is suitable for a particular spring design.

Typical Applications

Compression Springs

3.0mm 302 stainless steel spring wire can be considered for compression spring production where the specified diameter and hard-wire condition match the spring design.

Extension and Torsion Springs

The wire can also be evaluated for extension and torsion spring production. The suitability depends on the required forming process, spring dimensions and mechanical requirements.

Wire Forming Components

Beyond conventional springs, 3.0mm stainless steel wire can be used for selected wire-formed components, clips, retaining parts and industrial hardware.

The actual forming process should be matched to the specified hard condition and tensile strength.

How to Specify 3.0mm 302 Spring Wire

When purchasing this product, buyers should provide the following information:

Providing these details helps ensure that the supplied wire configuration matches the intended manufacturing process.

Quality Control and Inspection

For industrial spring wire, quality evaluation should focus on measurable specifications rather than general descriptions such as “high quality” or “premium.”

For this 3.0mm product, key items to confirm include:

• Material grade

• Wire diameter

• Dimensional tolerance

• Tensile strength

• Surface condition

• Coil or spool condition

• Packaging requirements

Inspection and material documentation can be discussed according to the order and applicable specification.

Packaging and Supply

3.0mm 302 stainless steel spring wire can be supplied in coils or spools according to production and handling requirements.

For automated spring-forming equipment, buyers should confirm the required coil weight, spool dimensions, unwinding method and packaging format before production.

FAQ

What is the tensile strength of the 3.0mm 302 spring wire?

The specified tensile strength for this hard 3.0mm configuration is 1450–1700 N/mm².

Is this wire suitable for spring manufacturing?

Yes. It is a 302 stainless steel spring wire supplied in hard condition. Final suitability should be evaluated according to spring dimensions, load requirements and forming conditions.

What is the wire diameter?

The diameter of this specific product is 3.0mm.

Can other diameters be supplied?

TOPONE's stainless steel wire product range covers 0.15–12mm. Mechanical properties may vary according to diameter, temper and production condition.

Can the surface finish be customized?

Surface requirements can be discussed according to the application and manufacturing process. Buyers should specify the required surface when requesting a quotation.

What information should I provide for a quotation?

Please provide the required grade, diameter, tensile strength, surface, quantity and packaging. If the wire is used for spring manufacturing, providing the spring type and forming process can also help with specification confirmation.