TEN-HIGH 10PCS Oil Tempered Spring Steel Wire 2.5mm,Length 1000mm 55CrSi Pre‑Tempered High Fatigue Alloy Steel Wire for Heavy Duty Springs, Clutch Springs, Suspension Coils(Length: 3.28ft)

This oil tempered spring steel wire is manufactured from alloy steel (55CrSi equivalent) and designed for high-stress applications. It offers superior fatigue resistance and mechanical strength compared to standard carbon steel, making it ideal for industrial spring production, automotive components, and heavy machinery. Material cross‑reference (for confident substitution): USA: SAE 9254 / ASTM A229 Japan: SUP12 / SWOSC‑V Germany: 54SiCr6 / 1.7102 China: 55CrSi / 55SiCrA Why choose oil tempered 55CrSi? No post‑winding full heat treatment – lower production cost Excellent relaxation resistance – spring doesn't sag Uniform fatigue life across the entire coil Technical specifications: Tensile strength grades: 1,800 – 2,000 MPa available Elastic modulus: 207 GPa (30,000 ksi) Max continuous service temp: 480°F (250°C) Surface: Black oxide + light oil Diameter range: 1.2mm to 6mm Who uses this wire? Automotive spring manufacturers (Tier 1 and Tier 2) Motorcycle suspension shops Industrial valve suppliers Aerospace spring fabricators

• Chrome‑silicon alloy – 55CrSi (same as SAE 9254, SUP12, 54SiCr6). This wire is engineered to withstand repeated stress cycles, making it ideal for high-load and long-life spring applications.
• Pre-hardened & oil tempered for consistent performance - Heat-treated during production, eliminating the need for additional hardening. Provides stable mechanical properties and reliable performance right out of the box.
• Superior elastic limit & load capacity – Maintains its shape under high stress and heavy loads, making it suitable for demanding industrial environments such as automotive and machinery systems.
• Ideal for industrial springs & mechanical components – Commonly used in suspension springs, heavy-duty machinery, and industrial spring manufacturing where performance and durability are critical.
• Note – After coiling, temper at 380–420°C to reduce surface residual stress. After shot peening, stress relieve at 250°C (hot pressing or standard stress relief). These steps ensure optimal fatigue life and dimensional stability.