Guangzhou Changfeng Steel Co., LTD
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Alloy Steel D2 1.2379 Hot Rolled Steel Bar
D2 is a high carbon, high chromium cold work tool steel. Recommended for use when greater toughness is required. It offers good wear resistance and high compressive strength.
1. Chemical composition(%):
| C | Cr | Mn | Mo | Si | V | P | S |
| 1.4-1.6 | 11-13 | 0.3-0.5 | 0.7-1.2 | 0.30-0.5 | ≤0.8 | ≤0.025 | ≤0.025 |
2. Available size(mm):
| Flat Bar Size(mm) | Round bar Size(mm) | |||
| Thickness | Width | Length | Diameter | Length |
| 6-160 | 155-810 | 3000-6000 | 50-120 | 3000-6000 |
3. Recommend heat treatment:
| Quenching | Tempering | ||||||
| Heating temperature/ºC | Cooling way | Hardness (HRC) | Tempering temperature /ºC | Tempering number | Hardness (HRC) | ||
| First preheating | Second preheating | Last heating | |||||
| 600-650 | 800-850 | 1020-1040 | Air Cooling | 61-63 | 500-560 | 2 | ≥58 |
4. Application:
For metal stamping die, drawing die, stainless steel sheet punching die, high hardness punching die, cutting knife mold, Roll Die, metal parts production, machinery manufacturing etc.
5. Features:
a. Good processing, heat treatment size stability.
b. Excellent machinability.
c. Excellent dimensional stability when hardened.
d. After hardening and tempering, the high surface hardness match well with the toughness of the body.
6. Delivery condition:
Surface: Grinding surface, black surface, turned surface and milling surface according to customer's requirements.
For abundant stock, 15-20 days.
For customized products, 30-50 days.
7. Packing: We provide Standard export packing or according to customers' request.
8. Terms of payment: 30% deposit T/T and the balance by L/C at sight, or T/T
Heat Treatment
DIN 1.2379 steels alloy should be preheated very slowly to 815℃ (1500°F) and the temperature can be increased to 1010oC (1850°F). Then held at 1010oC (1850°F) for 20 to 45 minutes and air-cooled (air quenched).
Annealing
Annealing of 1.2379 tool steels material should be done at 871 to 898°C (1600 to 1650°F) followed by slow furnace cooling at 4.4°C (40°F) per hour or less, after which cooling rate could be increased. At the same time, must do something to prevent excessive carburization or decarburization.
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