Product Specification

302 Soap-Coated Stainless Steel Spring Wire, 0.1–12mm

Product Overview

302 Soap-Coated Stainless Steel Spring Wire is an austenitic stainless steel wire designed for spring manufacturing and cold forming applications. It is available in diameters from 0.1mm to 12mm, with the wire condition and surface finish selected according to the required forming process and application.

The soap-coated surface provides a lubricated wire condition for downstream forming operations. Compared with a bright surface, a soap-coated finish can be considered when the manufacturing process requires additional surface lubrication during wire forming.

AISI 302 stainless steel is commonly used in spring wire applications where a combination of stainless steel properties and work-hardening behavior is required. The final wire condition should be selected according to diameter, tensile strength, spring design and forming requirements.

Product Specifications

Why Choose Soap-Coated 302 Spring Wire?

1. Wide Diameter Selection

The available diameter range of 0.1–12mm covers fine stainless steel spring wire as well as larger wire sizes used for formed components.

For a specific spring application, the appropriate diameter should be selected according to the spring geometry, working load, deflection and forming process rather than diameter alone.

2. AISI 302 Stainless Steel

AISI 302 is an austenitic chromium-nickel stainless steel grade commonly supplied in wire form.

Its suitability for spring applications depends on the selected wire condition and the mechanical requirements of the finished spring. Tensile strength and other mechanical properties can vary with wire diameter and processing condition.

3. Soap-Coated Surface

The soap-coated surface is intended for applications where surface lubrication is useful during subsequent forming or processing.

The coating specification should be matched to the customer's forming equipment and production process. For applications where surface appearance is the primary requirement, a bright surface can also be discussed.

4. Multiple Wire Conditions

Different spring and forming processes require different mechanical conditions. Hard or soft wire conditions can be discussed according to the customer's required tensile strength, forming method and finished component design.

Typical Applications

Spring Manufacturing

302 stainless steel spring wire can be processed into different spring types when the selected diameter and mechanical condition are suitable for the spring design.

Typical applications include:

• Compression springs

• Extension springs

• Torsion springs

• Small formed springs

• Industrial spring components

Wire Forming

The wire can also be used for formed-wire components requiring a stainless steel material and a specified wire diameter.

The appropriate wire condition should be selected based on bending radius, forming equipment and component geometry.

Screw and Formed Components

Selected diameters and wire conditions can be used for cold-forming applications where the material and processing requirements are compatible.

Fishing Components

Stainless steel wire can also be processed into selected fishing-related wire components where the required diameter and material properties are appropriate.

Surface Selection: Soap Coated vs. Bright

Surface condition is an important consideration when selecting stainless steel spring wire.

The surface should be selected according to the downstream manufacturing process rather than treating one finish as universally better than another.

How to Select 302 Stainless Steel Spring Wire

Before placing an order, buyers should confirm the following technical information:

Diameter

Specify the required wire diameter and dimensional tolerance according to the spring drawing or production specification.

Mechanical Condition

Provide the required tensile strength, hardness or wire condition when applicable.

Spring Type

Compression, extension, torsion and formed-wire applications may require different material conditions and processing parameters.

Surface

Select soap coated when the production process requires a lubricated surface condition, or bright when a clean metallic surface is preferred.

Packaging

Specify coil, spool or other packaging requirements according to the customer's wire-processing equipment.

Quality Control

For stainless steel spring wire, quality should be evaluated through measurable specifications rather than general performance claims.

Recommended inspection items include:

• Material grade and chemical composition

• Wire diameter and tolerance

• Tensile strength

• Surface condition

• Coil or spool weight

• Material traceability

• Packaging condition

• Required inspection documentation

For spring applications involving repeated loading, the finished spring should be evaluated according to its actual geometry, working load, deflection and operating conditions.

Ordering Information

To receive a suitable specification for 302 soap-coated stainless steel spring wire, buyers can provide:

1. Required diameter

2. Quantity

3. Spring or wire-form application

4. Required tensile strength or hardness

5. Surface requirement

6. Coil or spool requirement

7. Applicable material standard

8. Inspection or certification requirements

Providing these details allows the wire condition, surface and packaging to be matched more closely to the downstream manufacturing process.