Supreme Steels

SS 420

Product Description:

SS 420 is a high-carbon martensitic stainless steel that is known for its excellent hardness and corrosion resistance. It is one of the most commonly used stainless steels for applications requiring high strength and moderate corrosion resistance. SS 420 can be heat-treated to high hardness levels, making it suitable for applications such as cutting tools, knives, surgical instruments, and valves, where both mechanical properties and resistance to oxidation are critical.

Features:

Specifications:

Composition of SS 420 Stainless Steel:

Element Percentage
Carbon (C) 0.15 – 0.40%
Chromium (Cr) 12.0 – 14.0%
Manganese (Mn) 1.0% Max
Silicon (Si) 1.0% Max
Phosphorus (P) 0.04% Max
Sulfur (S) 0.03% Max
Iron (Fe) Balance
Nickel (Ni) 0.75% Max

Physical Properties:

Property Value
Density 7.75 g/cm³
Melting Point 1400°C (2550°F)
Hardness (Brinell) 200-250 HB
Tensile Strength 520-750 MPa (75,000-109,000 psi)
Yield Strength 450-600 MPa (65,000-87,000 psi)
Elongation 12-18%
Modulus of Elasticity 200 GPa
Thermal Conductivity 24 W/m·K
Coefficient of Thermal Expansion 10.5 × 10⁻⁶ /°C