Alloy 420
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Alloy 420 - Martensitic Stainless Steel
Alloy 420 is a high-carbon martensitic stainless steel known for its excellent hardness, wear resistance, and moderate corrosion resistance. It is commonly used in applications that require high strength and hardness, such as cutting tools, surgical instruments, and industrial equipment. Alloy 420 can be hardened through heat treatment, offering good mechanical properties and resistance to wear and tear.
Features of Alloy 420:
- High Hardness: Can be hardened to high levels, making it suitable for wear-resistant applications.
- Moderate Corrosion Resistance: Performs well in mild corrosive environments but may not be suitable for harsh, chloride-rich conditions.
- Good Wear Resistance: Ideal for components exposed to abrasion and mechanical wear.
- Heat Treatable: Can be heat-treated to achieve specific hardness and strength.
- Good Polishing Ability: Suitable for applications requiring a high-polish finish, such as surgical instruments.
Specifications:
Applicable Standards:
- ASTM A240, ASTM A276, UNS S42000
Mechanical Properties:
Property | Value |
---|---|
Tensile Strength | ~550 MPa |
Yield Strength | ~250 MPa |
Elongation | ~18% |
Hardness (BHN) | 200-400 |
Density | 7.75 g/cm³ |
Thermal Properties:
- Melting Range: 1400-1450°C
Chemical Composition:
Element | Percentage (%) |
---|---|
Chromium (Cr) | 12.0-14.0 |
Nickel (Ni) | ≤0.75 |
Manganese (Mn) | ≤1.0 |
Silicon (Si) | ≤1.0 |
Carbon (C) | 0.15-0.40 |
Phosphorus (P) | ≤0.04 |
Sulfur (S) | ≤0.03 |