Product Specification

0.2mm 302 Stainless Steel Spring Wire for Fine Forming

Product Introduction

0.2mm 302 Soap-Coated Stainless Steel Spring Wire is a fine-diameter stainless steel spring wire designed for miniature springs, precision wire forming and small mechanical components.

Manufactured from AISI 302 stainless steel, this wire has a nominal diameter of 0.2mm and a soap-coated surface suitable for downstream spring coiling and wire-forming processes where a lubricated wire surface is required.

The available stainless steel spring wire range is 0.15–12mm. Different diameters, mechanical conditions and surface finishes can be selected according to the spring design, forming equipment and application requirements.

For fine spring wire, diameter alone does not determine the final performance. Wire tolerance, tensile strength, spring geometry, forming method and operating conditions should be considered together when selecting the specification.

Product Specifications

Note: Final tensile strength, dimensional tolerance and mechanical condition should be confirmed according to the applicable standard and purchase specification.

AISI 302 Stainless Steel for Fine Spring Wire

AISI 302 is an austenitic stainless steel grade commonly used for stainless steel spring wire and cold wire-forming applications.

The mechanical condition of spring wire is influenced by cold working during production. Therefore, the required tensile strength or temper should be specified according to the finished spring design and manufacturing process.

For 0.2mm fine spring wire, buyers should consider the complete specification rather than selecting the material grade alone.

Important parameters include:

• Wire diameter

• Diameter tolerance

• Tensile strength

• Spring geometry

• Working load

• Working deflection

• Forming method

• Surface condition

• Service environment

Why Choose 0.2mm Stainless Steel Spring Wire?

Fine Wire Diameter for Small Components

The 0.2mm nominal diameter provides a fine wire option for compact springs and precision wire-forming components.

A smaller wire diameter can be considered when the finished component requires a fine cross-section or limited installation space.

The actual suitability should be determined from the spring load, deflection, coil diameter and other design parameters.

AISI 302 Material

AISI 302 is commonly used for stainless steel spring wire. Its mechanical condition can be developed through cold working to meet different spring manufacturing requirements.

For production orders, the required mechanical properties should be defined according to the applicable standard and spring design.

0.15–12mm Diameter Range

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

This range covers fine wire applications as well as larger spring and industrial wire-forming requirements.

These are general application references. The final wire diameter should be determined according to the component drawing and spring design.

Soap-Coated Surface for Spring Forming

The soap-coated surface is designed as a specific surface condition for downstream wire-forming and spring-making processes.

During spring coiling, the wire passes through feeding equipment and forming tools. The appropriate surface condition should therefore be selected according to:

• Spring coiling equipment

• Wire feeding system

• Tooling

• Forming speed

• Lubrication requirements

• Subsequent cleaning process

• Final surface requirements

Soap-coated wire can be considered where a lubricated surface is required during forming.

For applications requiring a different surface condition, bright or other specified finishes can be discussed according to the production process.

Applications

Miniature Compression Springs

0.2mm 302 stainless steel spring wire can be considered for small compression springs where a fine wire diameter is required.

Important design parameters include:

• Spring diameter

• Free length

• Working load

• Working deflection

• Number of active coils

• Required spring rate

The wire specification should be matched with the finished spring design.

Small Extension Springs

The wire can be used for small extension springs when the required diameter, mechanical condition and forming process are compatible with the spring design.

Miniature Torsion Springs

For small torsion springs, wire diameter, coil diameter, working angle and required mechanical properties should be evaluated together.

The 0.2mm wire size can be considered for compact torsion spring designs where the specified mechanical condition meets the application requirements.

Precision Wire Forms

Fine 302 stainless steel wire can also be formed into:

• Clips

• Hooks

• Retaining components

• Small brackets

• Fine wire forms

• Small hardware components

The wire condition and surface should be selected according to the forming process.

Small Mechanical Components

Fine stainless steel spring wire can be considered for compact mechanical components where a defined wire diameter and stainless steel material are required.

Final material selection should be based on the component design and operating conditions.

Product Advantages

0.2mm Fine Diameter

The 0.2mm nominal diameter provides a fine wire option for miniature springs and precision wire-forming applications.

AISI 302 Stainless Steel

AISI 302 is a commonly specified stainless steel grade for spring wire and cold wire-forming applications.

Soap-Coated Surface

The soap-coated surface provides a defined surface condition for forming processes where wire lubrication is required.

Cold-Drawn Manufacturing

Cold drawing is used to reduce and control the wire diameter while developing the mechanical condition required for the specified application.

2050–2400 N/mm² Tensile Strength

The listed specification provides a tensile strength range of 2050–2400 N/mm². The applicable tensile strength should be confirmed according to the final diameter, temper and purchase standard.

Coil and Spool Supply

The wire can be supplied in coil or spool form according to wire diameter, production equipment and customer handling requirements.

Quality Control and Inspection

For fine stainless steel spring wire, quality should be evaluated through measurable parameters rather than appearance alone.

Material Verification

Chemical composition can be checked against the specified AISI 302 stainless steel grade.

Diameter Inspection

The nominal diameter is 0.2mm. The required dimensional tolerance should be agreed before production and verified during inspection.

Tensile Strength Testing

Tensile strength can be tested according to the applicable product standard and purchase specification.

For this product specification, the listed tensile strength is 2050–2400 N/mm².

Surface Inspection

The soap-coated surface can be inspected according to the agreed surface requirements and intended forming process.

Coil and Packaging Inspection

Coil dimensions, coil weight, spool specifications and packaging can be checked according to customer requirements.

Documentation

Material Test Certificates and inspection documents can be provided when included in the purchase specification.

Applicable Standards

For stainless steel spring wire, ASTM A313/A313M is an important reference specification for stainless steel round spring wire intended for spring manufacturing.

Depending on the customer's market and technical requirements, specifications may also reference AISI, EN, DIN, JIS or equivalent standards.

The exact standard, material grade, diameter, tensile strength, tolerance and inspection requirements should be confirmed before production.

How to Select 0.2mm 302 Spring Wire

Selecting fine spring wire should start from the finished spring rather than the wire diameter alone.

1. Define the Spring Type

Determine whether the component is a compression spring, extension spring, torsion spring or another formed-wire component.

2. Determine the Working Load

The required spring force and deflection help determine whether a 0.2mm wire diameter is suitable.

3. Check the Spring Geometry

Mean coil diameter, free length, active coils and spring index should be considered together with wire diameter.

4. Specify Mechanical Properties

The required tensile strength or spring temper should be clearly defined according to the applicable standard.

5. Confirm the Surface Condition

For automated spring coiling, confirm whether a soap-coated surface is suitable for the customer's feeding system, tooling and forming process.

Ordering Information

For a quotation or technical inquiry, customers are recommended to provide:

• Material: AISI 302

• Diameter: 0.2mm

• Diameter tolerance

• Surface: Soap Coated

• Required tensile strength

• Temper condition

• Applicable standard

• Coil or spool requirements

• Coil weight

• Quantity

• Spring type or application

A spring drawing or basic spring dimensions can also help determine the appropriate wire specification.

Frequently Asked Questions

What is 0.2mm 302 stainless steel spring wire used for?

It can be considered for miniature compression springs, extension springs, torsion springs, precision wire forms, clips and other small formed-wire components.

Why use soap-coated stainless steel spring wire?

A soap-coated surface can provide a suitable lubricated surface condition for wire feeding and spring coiling processes. The exact coating requirement should be matched with the customer's forming equipment and downstream process.

Is 0.2mm wire suitable for miniature springs?

A 0.2mm wire diameter can be considered for miniature spring designs. Final suitability depends on spring geometry, required load, deflection, operating cycles and mechanical properties.

What is the tensile strength of this 0.2mm spring wire?

The listed specification shows a tensile strength of 2050–2400 N/mm². The final required tensile strength should be confirmed according to the applicable standard and purchase specification.

What diameter range is available?

The stainless steel spring wire range is 0.15–12mm. The nominal diameter of this product is 0.2mm.

What information should I provide when buying 0.2mm spring wire?

The main specifications include material grade, diameter, tolerance, tensile strength, temper, surface condition, applicable standard, quantity and packaging requirements.

Can the wire be supplied in coils or spools?

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

Technical Selection Guide for Fine Spring Wire

For miniature spring applications, selecting the smallest available wire diameter is not necessarily the correct approach.

A practical selection process is:

Spring Load → Working Deflection → Spring Geometry → Wire Diameter → Material Grade → Mechanical Properties → Surface Condition

For this reason, 0.2mm 302 stainless steel spring wire should be evaluated according to the complete spring design and manufacturing process.

For applications involving high cycle counts, demanding working loads or specific operating environments, the material specification and spring design should be reviewed before production.

Technical Inquiry

For a 0.2mm 302 stainless steel spring wire inquiry, please provide:

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

For miniature spring or precision wire-forming projects, providing the spring drawing or component specification can help determine the appropriate wire condition and surface specification.