D2
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Product Description:
D2 is a high-carbon, high-chromium tool steel, classified as a cold-work steel, which is known for its excellent wear resistance, high hardness, and good toughness. It is commonly used in tooling applications where resistance to wear and impact is critical, such as in die-making, stamping, cutting tools, and knives. D2 has a higher carbon content than other cold-work steels, allowing it to achieve exceptional hardness and retain it at elevated temperatures.
Features:
- High Wear Resistance: D2's high carbon and chromium content provide outstanding wear resistance, making it ideal for use in high-stress, abrasive environments.
- High Hardness: It can be heat treated to achieve hardness levels of 60-62 HRC, allowing it to maintain sharp edges for extended periods.
- Good Toughness: Despite its hardness, D2 retains decent toughness, which makes it suitable for tooling applications where impact resistance is necessary.
- Moderate Corrosion Resistance: D2 offers a degree of resistance to corrosion due to its high chromium content (around 12%), but it is not as resistant as stainless steels.
- Excellent Edge Retention: D2 is widely used for cutting tools and dies due to its ability to retain sharp edges even under heavy use.
- Machinability: D2 is machinable, though care should be taken during heat treatment to avoid cracking. It can be processed by conventional machining and grinding.
Specifications:
- ASTM A681: Standard Specification for Tool Steel, Cold-Worked, including D2.
- AMS 5353: SAE J434: Standard for tool steels (including D2).
- UNS T30402: Unified Numbering System designation for D2 tool steel.
Composition of D2 Tool Steel:
Element | Percentage |
---|---|
Carbon (C) | 1.40 – 1.60 |
Chromium (Cr) | 11.00 – 13.00 |
Manganese (Mn) | 0.60 max |
Silicon (Si) | 0.30 max |
Phosphorus (P) | 0.03% max |
Sulfur (S) | 0.03% max |
Iron (Fe) | Balance |
Physical Properties:
Property | Value |
---|---|
Density | 7.85 g/cm³ |
Melting Point | 1425°C (2600°F) |
Hardness (Rockwell C) | 60-62 HRC |
Tensile Strength (Ultimate) | 1700 MPa (250,000 psi) |
Yield Strength | 1500 MPa (217,000 psi) |
Elongation | 8-10% |
Modulus of Elasticity | 210 GPa |