302 Stainless Steel Spring Wire is a high-quality austenitic stainless steel wire designed for applications requiring excellent strength, elasticity, and corrosion resistance. Produced by Jiangsu Cunrui Metal Products Co., Ltd., our spring wire complies with international standards such as ASTM A313, EN 10270-3, and JIS G4314, ensuring global compatibility and reliability.
With a balanced composition of chromium and nickel, 302 stainless steel offers high tensile strength, superior fatigue resistance, and long-lasting performance even in harsh environments. Each batch is supplied with mill test certificates (MTC) and can be verified by third-party inspection, giving buyers complete confidence in material quality and compliance.
Features & Advantages
High Elasticity & Strength – Designed for demanding spring applications where durability is critical.
Corrosion Resistance – Performs well in humid, chemical, and industrial environments.
Consistent Mechanical Properties – Stable tensile strength and elongation across all diameters.
Certified Quality – Full traceability with MTC, third-party inspection available.
International Standards – Produced according to ASTM, EN, and JIS specifications.
Applications
302 Stainless Steel Spring Wire is widely used in industries that require resilient and long-lasting springs, including:
Automotive components (valve springs, clutch springs)
Industrial machinery and precision instruments
Electrical and electronic devices
Aerospace fasteners and mechanical springs
Household appliances and consumer products
Product Specifications & Technical Data
Basic Information
|
Parameter |
Specification |
|
Material Grade |
302 Stainless Steel Spring Wire |
|
Diameter Range |
0.20 mm – 16 mm (customized) |
|
Tensile Strength |
1600 – 2300 MPa |
|
Hardness |
HV 420 – 520 |
|
Elongation |
≥ 2% |
|
Surface Condition |
Bright, Polished, Coated, Soap-coated |
Chemical Composition (Typical, %)
|
Element |
C |
Si |
Mn |
P (max) |
S (max) |
Cr |
Ni |
|
Content |
≤ 0.15 |
≤ 1.00 |
≤ 2.00 |
≤ 0.045 |
≤ 0.030 |
17.0–19.0 |
8.0 – 10.0 |
Customization Services
At Jiangsu Cunrui Metal Products Co., Ltd., we provide flexible customization for 302 Stainless Steel Spring Wire, including:
Special diameters, coil weights, and lengths
Surface finishes: polished, bright, soap-coated, or custom coatings
Processing support: cutting, shaping, welding, and coiling
Flexible MOQ for trial or bulk orders
Support for production according to customer drawings or technical requirements
Pricing & Delivery
We provide competitive pricing with attractive bulk discounts. Standard sizes of 302 Stainless Steel Spring Wire are available from stock for immediate shipment, while customized orders are delivered within 15–30 days, depending on order volume and specifications.
Our Strength
Advanced production facilities with precision drawing and heat-treatment equipment
Annual production capacity of over 20,000 tons
ISO-certified factory with strong quality assurance system
Professional R&D and technical team for continuous improvement
Rich export experience serving Europe, North America, the Middle East, and Southeast Asia
Service & Support
Quick inquiry response within 12 hours
Professional technical consultation for material selection and applications
Export-standard packaging (seaworthy coils, pallets, cartons)
After-sales guarantee – Replacement or refund in case of quality issues
Logistic solutions with controlled delivery schedules
FAQ
Q1: What is the tensile strength range of 302 Stainless Steel Spring Wire?
A1: Typically between 1600 – 2300 MPa, depending on wire diameter and processing.
Q2: Do you provide mill certificates (MTC)?
A2: Yes, every order is supplied with MTC, and third-party inspections (SGS, BV, etc.) are available.
Q3: Can you supply customized sizes and surface treatments?
A3: Absolutely. We support tailor-made dimensions, coatings, and coil weights to meet customer requirements.
Q4: What is your minimum order quantity (MOQ)?
A4: Our MOQ is flexible, starting from small trial quantities to bulk production.
Q5: How fast can you deliver?
A5: Stock sizes can be shipped immediately, while customized orders are delivered within 15–30 days.
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