420 stainless steel spring wire

420 stainless steel wire, also known as 1.4028, is a martensitic stainless steel that is often quenched and tempered to achieve its desired properties. This wire is commonly used in various applications where moderate corrosion resistance is essential. The unique combination of high hardness, wear resistance, and good toughness makes 420 stainless steel spring wire suitable for a wide range of uses, from household instruments to medical and industrial applications. Its excellent fatigue properties make it particularly valuable in the spring industry, often found in compliance with EN10270-3 standards.

420 Alloy Description

Alloy 420 provides good corrosion resistance, similar to Alloy 410, but with increased strength and hardness. It remains magnetic in both its annealed and hardened states, with maximum corrosion resistance achieved only when fully hardened.

Applications of 420 Stainless Steel Wire

• Cutlery
• Surgical and dental instruments
• Firearm parts
• Scissors
• Tapes
• Straight edges

Typical Chemistry

• Carbon: 0.30-0.40
• Manganese: 1.00 max
• Silicon: 1.00 max
• Chromium: 12.00-14.00
• Nickel: 0.50 max
• Molybdenum: 0.50 max
• Phosphorus: 0.040 max
• Sulfur: 0.030 max
• Copper: 0.50 max
• Aluminum: 0.15 max
• Tin: 0.050 max
• Iron: Balance

Physical Properties

• Density: 0.28 lbs/in³, 7.74 g/cm³
• Electrical Resistivity: 21.71 microhm-in at 68°F (20°C)
• Specific Heat: 0.11 BTU/lb/°F at 32-212°F (0-100°C)
• Thermal Conductivity: 14.4 BTU/hr/ft²/ft/°F at 212°F (100°C)
• Mean Coefficient of Thermal Expansion: 5.7 x 10⁻⁶ in/in/°F (0-100°C)
• Modulus of Elasticity: 29.0 x 10³ KSI (200 x 10³ MPa) in tension
• Magnetic Permeability: Magnetic
• Melting Range: 2723°F (1495°C)

Why Choose Us?

1. Obtain the perfect stainless steel spring wire tailored to your requirements at competitive prices.
2. We offer various shipping options, including Reworks, FOB, CFR, CIF, and door-to-door delivery to ensure economical logistics.
3. Our materials come with full verification, including raw material test certificates and final dimensional statements available upon request.
4. We guarantee a response within 24 hours, often within the same hour.
5. Enjoy stock alternatives and mill deliveries that minimize manufacturing time.
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