1.2080 | D3 | SKD1 | Cr12 | X12
AISI D3 alloy steel is heat treatable and will offer a hardness in the range 58-64 HRC. After heat treatment D3 tool steel is hard, durable and dense, and is immune from sinking in use.
Description
Character
AISI D3 alloy steel is heat treatable and will offer a hardness in the range 58-64 HRC. After heat treatment D3 tool steel is hard, durable and dense, and is immune from sinking in use. It offers a measure of corrosion resistance when polished. In general, the applications of AISI D3 tool steel resemble those of D2 tool steel but it should be remembered that alloy tool steel D3 has better wear resistance of the two steels and is preferred for such items as shear blades. Owing to its higher wear resistance, AISI / ASTM D3 cold work steel is slightly more difficult to grind than D2 steels.
Chemical Composition
| Standard | Grade | C | Si | Mn | Cr | P | S |
| ASTM | D3 | 2.00-2.35 | 0.10-0.60 | 0.20-0.60 | 11.00-13.00 | ≤0.03 | ≤0.03 |
| JIS | SKD1 | 1.90-2.20 | 0.10-0.40 | 0.20-0.60 | 11.00-13.00 | ≤0.03 | ≤0.03 |
| DIN | 1.2080 | 1.90-2.20 | 0.10-0.40 | 0.15-0.45 | 11.00-12.00 | ≤0.03 | ≤0.03 |
| GB | Cr12 | 2.00-2.30 | 0.40 | 0.40 | 11.50-13.00 | ≤0.03 | 0.03 |
Supply Range
Surface Finish: Black, Peeled, Machined/Turned or as per given requirements.
Forged Round Bar: 20mm - 650mm (Dia)
Rolled Bars: 12mm - 360mm (Dia)
Forged flats: 30-400mm(T)*500-1200mm(W)
Rolled flats: 10-360mm(T)*30-1020mm(W)
Other sizes of O1 material or as per customer’s requirements
Heat Treatment
Forging
Pre-heat at 900-950°C then raise temperature to 1050-1100°C. Soak until uniformly heated. D3 tool steel is relatively hard at elevated temperature. Therefore, initial hammer blows must be light and the temperature must not be allowed to fall below 1020°C until the metal begins to flow. Final forging should not be done below 900°C.
Annealing
Heat uniformly to 850-870°C, soak thoroughly, then slow furnace cool at a rate of not more than 25°C per hour to 650°C. The parts may then be air cooled. This should result in a maximum hardness of brinell 248.
Hardening
D3 tool steel is extremely sensitive to overheating during hardening – do not overheat.
Pre heat slowly to 800-850°C, the raise rapidly to 950-970°C and soak until completely equalised. Quench in oil.
Stress Relieving
Heat to 650-700ºC. Soak for 2-4 hours then furnace cool.
Tempering
Heat uniformly and thoroughly to the desired temperature and hold for 25 minutes per cm of thickness. D3 can be double tempered after intermediate cooling to room temperature.
Applications
1.2080 D3 tool steel is suitable for applications such as complex blanking and forming tools for long runs and for hard and abrasive materials. It is commonly used for other applications such as brick and tile mould liners, master hobs for cold hobbing plastic moulds, tabletting punches and sleeves for corrosive powders.
