Stainless Steel Spring Wire

Description

Product Description Of Stainless Steel Spring Wire

Stainless steel spring wire is specially processed through cold drawing and heat treatment to achieve high elasticity and fatigue resistance. It is manufactured from grades such as 302, 304, 316, 631 (17-7PH), and 301, depending on application and performance requirements.

Spring wire is available in round, flat, or shaped profiles and is widely used in compression springs, extension springs, torsion springs, and other precision spring elements across aerospace, electronics, medical, and automotive sectors.

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Specifications of Stainless Steel Spring Wire

Parameter	Range / Option
Diameter	0.15 mm – 12 mm
Form	Coil, spool, or straight cut
Finish	Bright, Soap-coated, Annealed
Temper	Soft, 1/4 Hard, 1/2 Hard, Full Hard
Standard	ASTM A313, JIS G4314, DIN EN 10270-3

Typical Mechanical Properties (304 Spring Wire)

Property	Value
Tensile Strength	1600 – 2000 MPa
Elongation	≥ 3%
Torsion Strength	Excellent
Fatigue Resistance	Very High
Modulus of Elasticity	~193 GPa

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Advantages of Stainless Steel Spring Wire

• High tensile and yield strength

• Excellent resistance to fatigue and deformation

• Corrosion-resistant in harsh environments

• Superior surface finish and dimensional control

• Available in cold drawn and oil-tempered conditions

• Easy to form, wind, and process

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Applications of Stainless Steel Spring Wire

✅ Compression springs for valves, suspensions
✅ Extension springs in machinery and tools
✅ Torsion springs for hinges and motors
✅ Electronic devices and battery contact springs
✅ Medical instruments like surgical clamps
✅ Aerospace and defense spring assemblies
✅ Automotive systems like clutch and brake springs
✅ Industrial robots and precision components

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Common Grades and Properties

Grade	Type	Tensile Strength	Notes
302	Austenitic	1700–2100 MPa	Good spring properties, widely used
304/304V	Austenitic	1600–2000 MPa	Non-magnetic, weldable
316	Austenitic	1500–1900 MPa	Marine-grade corrosion resistance
301	Austenitic	1700–2100 MPa	High work hardening rate
17-7PH	PH Steel	1700–2300 MPa	Excellent strength after aging

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FAQs – Stainless Steel Spring Wire

Q1: What’s the difference between spring wire and regular stainless wire?
A: Spring wire has higher tensile strength, better fatigue resistance, and is processed for elasticity. Regular wire is softer and more formable.

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Q2: What grade is best for corrosion resistance and spring performance?
A: 316 stainless spring wire offers the best corrosion resistance. For high strength and fatigue, 17-7PH is ideal.

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Q3: Can you supply ultra-fine spring wire for electronics?
A: Yes, Gengfei can supply spring wire as thin as 0.15 mm for micro-components and battery springs.

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Q4: How is spring wire packaged?
A: Typically in plastic spools, steel carriers, or paper coils depending on size and quantity.

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Q5: Is stainless spring wire magnetic?
A: Grades like 304 and 316 are generally non-magnetic in annealed form but may become slightly magnetic after cold working.