Product Specification

0.7mm 304 Stainless Steel Spring Wire with Soap-Coated Surface

Product Introduction

The 0.7mm 304 stainless steel spring wire is a hard-temper stainless steel wire designed for spring manufacturing and precision wire forming. Made from AISI 304 stainless steel, it combines the corrosion resistance of an austenitic stainless steel grade with the mechanical properties required for spring applications.

This wire has a soap-coated surface, which is commonly used for spring wire processing where controlled surface lubrication is required during coiling and forming. The coating can help reduce friction between the wire and forming equipment, making it suitable for automated spring production and other wire-forming operations.

With a nominal diameter of 0.7 mm, this specification is suitable for small and medium-sized spring components where wire diameter, tensile strength, surface condition and forming behavior need to be considered together.

For orders requiring a defined standard, the product can be supplied according to applicable specifications such as ASTM, EN, DIN, JIS or GB, subject to the agreed material and mechanical requirements.

Product Specifications

* Mechanical values should be confirmed against the applicable standard, wire diameter and agreed delivery condition before production.

Why 304 Stainless Steel for Spring Wire?

AISI 304 is a widely used austenitic stainless steel grade containing chromium and nickel. Its corrosion resistance makes it suitable for spring components exposed to moisture and general industrial environments.

For spring manufacturing, material grade should not be considered separately from wire diameter and temper condition. The required tensile strength and forming behavior depend on the specification selected for the application.

For applications requiring higher corrosion resistance, particularly in chloride-containing or more aggressive environments, other stainless steel grades such as 316 may be considered according to the actual working conditions.

Soap-Coated Surface for Spring Forming

The soap-coated surface is an important processing feature of this spring wire.

During automatic coiling or wire forming, the wire continuously passes through guides, dies and forming tools. A suitable surface condition can help control friction during processing and reduce direct metal-to-tool contact.

The appropriate coating condition should be selected according to:

• Spring coiling equipment

• Forming speed

• Tool material

• Required surface appearance

• Lubrication system

• Subsequent cleaning or finishing process

For customers using automatic spring coiling equipment, surface condition should therefore be evaluated together with wire diameter and tensile strength rather than treated as an independent specification.

Typical Applications

Compression Springs

The 0.7mm wire can be used for small compression springs in mechanical and general industrial components.

Extension Springs

The material is suitable for extension spring production where the required spring geometry and mechanical specification match the selected wire condition.

Torsion Springs

304 stainless steel spring wire can also be formed into torsion springs for mechanical components, hardware and equipment assemblies.

Wire Forms and Small Components

The wire can be processed into clips, hooks, retaining components and other formed wire parts where stainless steel corrosion resistance is required.

Product Advantages

1. 304 Stainless Steel Grade

AISI 304 provides a commonly used balance of corrosion resistance and mechanical performance for general stainless steel spring applications.

2. 0.7mm Precision Specification

The 0.7mm diameter is suitable for applications requiring relatively fine spring wire and controlled wire dimensions.

3. Soap-Coated Surface

The soap coating provides a lubricated surface condition for wire forming and spring coiling processes where reduced processing friction is required.

4. Multiple Standard Options

Depending on the project requirements, specifications can be discussed according to ASTM, EN, DIN, JIS or GB standards.

5. Multiple Supply Forms

The wire can be supplied in coil or spool form, with packing and coil weight discussed according to the customer's processing equipment and production requirements.

Quality Control

For stainless steel spring wire, product quality should be evaluated using measurable specifications rather than general descriptions.

Typical inspection items include:

• Chemical composition of the stainless steel grade

• Wire diameter and dimensional tolerance

• Tensile strength

• Surface condition

• Coil uniformity

• Mechanical test requirements

• Packaging and identification

For orders with specific technical requirements, inspection documents such as material certificates or test reports can be discussed before production.

How to Select Stainless Steel Spring Wire

When selecting spring wire for a specific application, buyers should provide more than the material grade alone.

The following information is recommended:

1. Material grade: 304, 302, 316 or other stainless steel grade

2. Wire diameter: for example, 0.7 mm

3. Spring type: compression, extension or torsion

4. Required tensile strength or standard

5. Surface condition: soap coated, bright or other specified finish

6. Spring forming equipment: manual, CNC or automatic coiling

7. Working environment: humidity, temperature and possible chemical exposure

8. Packaging requirement: coil, spool or customized packing

This information allows the wire specification to be matched more closely to the actual spring manufacturing process.

FAQ

Is 0.7mm 304 stainless steel wire suitable for springs?

Yes. 304 stainless steel spring wire is commonly used for compression, extension and torsion spring applications when the required diameter, tensile strength and temper condition are appropriate for the spring design.

What is the purpose of the soap coating?

The soap coating provides a lubricated surface condition that can help control friction during spring coiling and wire forming. The exact coating requirement should be matched to the customer's equipment and processing conditions.

What standards are available?

The product can be discussed according to ASTM, EN, DIN, JIS and GB requirements. The applicable standard should be confirmed with the required mechanical and dimensional specifications before production.

Can other diameters be supplied?

Yes. TOPONE Wire's stainless steel wire production covers diameters from approximately 0.15 mm to 12 mm, depending on the material, wire type and required surface condition.

Can 316 stainless steel be used instead of 304?

316 can be considered when the application requires higher corrosion resistance, especially in environments involving chlorides or more aggressive chemical exposure. The appropriate grade should be selected according to the actual working conditions.