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Air cooling hardened hot work tool steel, most widely used hot work tool steel.
Product Details
Chemical Composition (%)
| Standard | Steel Grade | C | Si | Mn | P | S | Cr | Mo | V | W |
| DIN | 1.2344 | 0.37-0.42 | 0.90-1.20 | 0.30-0.50 | 0.030 | 0.030 | 4.80-5.50 | 1.20-1.50 | 0.90-1.00 | - |
| ASTM | H13 | 0.32-0.45 | 0.80-1.20 | 0.20-0.50 | 0.030 | 0.030 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 | - |
| GB | 4Cr5MoSiV1 | 0.32-0.42 | 0.80-1.20 | 0.20-0.50 | 0.030 | 0.030 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 | - |
Specification
| Round bar | Diameter | Length | - |
| Forged round bar：φ50~450 | 2000~6000 | - | |
| Rolled round bar：φ10~80 | 2000~6000 | - | |
| Flat bar | Thickness(mm) | Width(mm) | Length(mm) |
| Forged plate：20~300 | 50~710 | 2000~6000 | |
| Rolled plate：10~65 | 155~610 | 2000~6000 |
Heat Treatment
| Soft Annealing(℃) | Cooling | Hardness(HB) | Hardening(℃) | In | Hardness(HRC) |
| 860-890 | Furnace | Max.229 | 1020-1060 | In air, oil, thermal bath 450-550℃ | 52-56 HRC |
| Tempering(℃) | 100 | 200 | 300 | 400 | 450 | 500 | 550 | 600 | 650 | 700 |
| HRC | 53 | 52 | 51 | 52 | 53 | 54 | 53 | 50 | 43 | 31 |
| N/mm2 | 1845 | 1790 | 1730 | 1790 | 1845 | 1910 | 1845 | 1680 | 1360 | 995 |
Quenching technique
| Quenching temperature | Cooling | Hardness HRC | ||
| Medium | Temperature | Continuation | ||
| 1020-1050 | Oil or air | 20-60 | Room temperature | 56-58 |
Forging technique
| Heat temperature | Start Forging temperature | Finish Forging temperature | Cooling |
| 1120-1150 | 1050-1100 | 900-850 | Burial pit or sand cooling |
Tempering Technique
| Purpose | Heating Temperature | Heat treatment equipment | Cooling | Hardness HRC |
| Eliminate stress, stabilize structures | 560-580 | Gas furnace or Electric furnace | Air | 47-49 |
Characteristics
1. Air cooling hardened hot work tool steel, most widely used hot work tool steel.
2. High toughness and cold and heat-fatigue resistance.
3. Excellent toughness hot fatigue resistance and certain abrasion resistance at medium temperature.
4. During air cooling, deformation and oxide skin tendency is small. Good resistance from the undermining of fusing aluminum.
Delivery condition
Annealing,
hardness is below 235HB
Surface: black, machined, painted and other customized.
