Product Specification

1.2mm 1.4mm Type 302 Soap-Coated Stainless Steel Spring Wire

Product Introduction

TOPONE Type 302 stainless steel spring wire is available in 1.2 mm and 1.4 mm diameters with a soap-coated surfacefor spring manufacturing and other wire-forming applications.

The combination of Type 302 stainless steel, controlled wire diameter and soap-coated surface is intended for applications where the wire needs to pass through forming equipment under controlled processing conditions.

For spring production, wire selection should consider the spring design, required mechanical properties, forming process, surface condition and service environment together. Diameter alone should not be used as the only selection criterion.

Product Specifications

The applicable material standard, tensile strength, hardness and other mechanical requirements should be confirmed according to the customer's drawing or spring production specification.

Why Choose Type 302 Stainless Steel for Spring Wire?

Type 302 is an austenitic stainless steel grade used in wire and spring applications where the required combination of corrosion resistance and cold-working characteristics is compatible with the component design.

For spring manufacturing, the final wire specification should be determined according to:

• Required spring load

• Spring diameter

• Number of forming operations

• Required deflection

• Working temperature

• Exposure environment

• Forming machine and tooling

• Required tensile strength and hardness

This approach is more appropriate than selecting spring wire based only on the stainless steel grade.

1.2mm and 1.4mm Diameter Options

This product is available in two commonly used diameters:

1.2mm Stainless Steel Spring Wire

The 1.2mm option can be considered for spring designs requiring a relatively fine wire diameter while maintaining the material characteristics required by the application.

1.4mm Stainless Steel Spring Wire

The 1.4mm option provides a larger wire diameter for spring designs where the component geometry and required spring load call for a different wire size.

The appropriate diameter should ultimately be determined from the spring drawing, coil diameter, active coils, working load and forming process.

Soap-Coated Surface

The soap coating is an important processing characteristic of this product.

During spring forming, wire continuously contacts guides, tooling and forming components. A soap-coated surface can provide a lubricated interface during suitable forming processes.

The coating can be considered when:

• The wire is continuously fed into spring-forming equipment

• Surface lubrication is required during forming

• The forming process involves repeated wire/tool contact

• The customer has a defined post-forming cleaning process

The required coating condition should be confirmed according to the customer's equipment, lubricant system and subsequent surface treatment.

Diameter Tolerance

The listed diameter tolerance for this product is ±0.015 mm.

For spring manufacturing, diameter tolerance can affect the relationship between wire diameter and finished spring dimensions. Therefore, buyers should confirm the required tolerance together with the spring drawing and forming equipment.

For example, when selecting between 1.2mm and 1.4mm wire, the nominal diameter, tolerance and finished spring dimensions should be evaluated together rather than considered independently.

Applications

Compression Springs

The wire can be used for compression spring production when the 302 material grade, 1.2mm or 1.4mm diameter and required mechanical properties are compatible with the spring design.

Extension Springs

For extension springs, the wire specification should be evaluated together with the required spring load, hook or loop geometry and forming process.

Torsion Springs

For torsion spring applications, buyers should confirm the required torque, bending conditions and forming requirements before selecting the wire specification.

Other Wire-Formed Components

The wire can also be considered for small and medium wire-formed components requiring stainless steel material and a controlled wire diameter.

Product Advantages

Controlled 1.2mm / 1.4mm Diameter

The product is supplied in two defined diameters, with a listed tolerance of ±0.015 mm, providing a clear dimensional specification for spring manufacturing.

Type 302 Stainless Steel

Type 302 provides an austenitic stainless steel material option for spring and wire-forming applications where its material characteristics meet the required service conditions.

Soap-Coated Surface

The soap-coated finish provides a lubricated surface condition for suitable wire-forming processes and can be selected according to the customer's forming and lubrication requirements.

Multiple Spring Applications

The wire can be considered for compression, extension, torsion and other formed-wire applications, subject to the required spring design and mechanical specifications.

Documented Quality Requirements

The product information identifies ISO 9001 quality-system certification and RoHS compliance. For a specific order, the applicable documentation and inspection requirements should be confirmed with the order specification.

Technical Parameters to Confirm Before Ordering

For buyers sourcing 1.2mm or 1.4mm Type 302 spring wire, the following information is recommended:

Material Grade

Confirm Type 302 stainless steel and the applicable material standard.

Wire Diameter

Select 1.2mm or 1.4mm according to the spring drawing and required mechanical performance.

Diameter Tolerance

The listed tolerance is ±0.015mm. If a tighter tolerance is required, this should be specified before production.

Surface Condition

This product uses a soap-coated surface. Confirm whether the coating is required for forming lubrication and whether it needs to be removed after spring production.

Mechanical Properties

Provide the required tensile strength, hardness, elongation or temper condition when these values are controlled by the customer's production process.

Spring Type

Specify whether the wire will be used for compression, extension, torsion or another spring design.

Quality Control and E-E-A-T Information

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

Important parameters may include:

• Material grade

• Chemical composition

• Wire diameter

• Diameter tolerance

• Tensile strength

• Hardness

• Surface condition

• Coating condition

• Applicable standard

• Coil dimensions

• Inspection documentation

For this product, the available product information specifies 1.2mm / 1.4mm diameter with ±0.015mm tolerance, together with ISO 9001 and RoHS information.

For a technical quotation, buyers should provide the wire diameter, material standard, mechanical requirements, spring type, quantity and surface requirements.

How to Select 1.2mm or 1.4mm Spring Wire

1. Start With the Spring Drawing

Confirm the finished spring dimensions, wire diameter and required working load.

2. Compare 1.2mm and 1.4mm

The two diameters should be evaluated according to the spring's geometry and required mechanical performance rather than simply choosing the larger or smaller size.

3. Confirm the Forming Process

Check the compatibility of the wire with the spring-forming machine, tooling and lubrication system.

4. Confirm the Surface Requirement

Soap-coated wire is suitable when a lubricated surface condition is required by the forming process.

5. Confirm the Mechanical Specification

Tensile strength, hardness and other mechanical requirements should be specified according to the applicable standard or customer drawing.

FAQ

What diameters are available for this 302 spring wire?

This product is available in 1.2mm and 1.4mm diameters.

What is the diameter tolerance?

The listed diameter tolerance is ±0.015mm.

Is the 302 stainless steel wire soap coated?

Yes. The product is specified with a soap-coated surface.

Can this wire be used for compression springs?

Yes, it can be considered for compression spring production when the material, diameter and mechanical properties are suitable for the spring design.

Can it be used for torsion or extension springs?

The wire can also be considered for torsion and extension springs. The final specification should be determined according to the spring geometry, working load and forming requirements.

What information is needed for a quotation?

Provide the required diameter, material grade, applicable standard, tensile strength or hardness, spring type, quantity and surface requirement. A spring drawing is also useful for technical evaluation.