440 stainless steel spring wire

440 stainless steel is a martensitic stainless steel alloy that includes chromium, carbon, and other elements. Known for its excellent corrosion resistance, high hardness, and relatively affordable cost, 440 stainless steel is frequently used in diverse applications. However, unlike common grades such as SS 304 and SS 316L, 440 stainless steel spring wire is not as widely recognized or used in everyday applications.

Mechanical Properties of 440 Stainless Steel Spring Wire Sheet

• Hardness: Annealed condition, ≤269HB; Quenched and tempered condition, ≥633HV.
• Tensile Strength: 560 N/mm², HB (250).

Heat Treatment Process

1. Annealing: 800 - 920°C, slow cooling.
2. Quenching: 1010 - 1070°C, cooled in oil.
3. Tempering: 100 - 180°C, rapid cooling.

Delivery Condition

Typically delivered in a heat-treated state for optimal performance.

The 440 stainless steel spring wire stands out due to its exceptionally high hardness, which ranks among the highest of all stainless and heat-resistant steels. This hardness provides superior wear resistance, making 440 stainless steel spring wire ideal for applications in hand-made knives and high-quality factory tools that demand durability and corrosion resistance. A notable characteristic is its tendency to heat up quickly and develop higher viscosity during grinding, which requires special handling.

Why Choose Us for 440 Stainless Steel Spring Wire:

1. Customized Material Solutions: We supply materials tailored to your requirements at competitive prices.
2. Flexible Delivery Options: We offer shipping options such as Reworks, FOB, CFR, CIF, and door-to-door services, ensuring economical delivery solutions.
3. Fully Traceable Materials: All materials are provided with complete verification, including raw material test certificates and final dimensional statements (reports available upon request).
4. Responsive Customer Service: We respond within 24 hours, often within the same hour.
5. Stock Availability and Timely Delivery: Choose from in-stock options or mill deliveries with minimized manufacturing lead times.
6. Commitment to Customer Satisfaction: We prioritize customer relationships and strive to meet all commitments.
7. Longevity and Corrosion Resistance: Our materials are chosen for their durability and resistance to corrosion, making them ideal for long-lasting applications.