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Mat.No. 1.2606/DIN X37CrMoW5-1/AISI H12
H12 hot work tool steel is a 5% chromium, general-purpose hot work steel that is characterized by excellent impact toughness. It contains less vanadium than the widely-used H13 hor work tool steel. Steel is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treatment. It has good resistance to thermal fatigue cracking (heat cracking) and excellent resistance to gross cracking and thermal shock when water cooled in service.
Designation by Standards
| Mat. No. | DIN | EN | AISI |
| 1.2606 | X37CrMoW5-1 | - | H12 |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.37 | 1.05 | 0.45 | 5.30 | 1.45 | - | 0.28 | 1.30 | - |
Applications
H12 hot work steel is recommended for hot tooling applications where maximum resistance to cracking is required. Such applications include hot punches, die casting dies, forgins die, hot shear baldes, and extrusion tooling.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 207
Density [g/cm3]: 7.84
Thermal conductivity [W/m.K]: 18.9
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC | 20-200oC | 20-400oC | 20-600oC |
| 9.8 | 11.0 | 12.1 | 13.0 |
Soft Annealing
Heat to 820-840oC, cool slowly in furnace. Time is 4-6 hours. This will produce a maximum Brindle hardness of 220.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx.650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 1000-1050oC followed by oil, air quenching or warm bath quenching approx. 540oC. Hardness after quenching is 54 HRC.
Tempering
Tempering temperature: 520-700oC, at least 2-3x.
Forging
Hot forming temperature: 1100-850oC.
Machinability
75-80% of a 1% carbon steel.
Corrosion Resistance
Corrosion resistance of this alloy is better than that of plain carbon steels. However, it will rust unless given protective treatment.
Forms manufactured
Please refer to Dimensional Sales Program.
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes. There is no representation that the recipient of this literature will receive updated editions as the become available.
H12 hot work tool steel is a 5% chromium, general-purpose hot work steel that is characterized by excellent impact toughness. It contains less vanadium than the widely-used H13 hor work tool steel. Steel is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treatment. It has good resistance to thermal fatigue cracking (heat cracking) and excellent resistance to gross cracking and thermal shock when water cooled in service.
Designation by Standards
| Mat. No. | DIN | EN | AISI |
| 1.2606 | X37CrMoW5-1 | - | H12 |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.37 | 1.05 | 0.45 | 5.30 | 1.45 | - | 0.28 | 1.30 | - |
Applications
H12 hot work steel is recommended for hot tooling applications where maximum resistance to cracking is required. Such applications include hot punches, die casting dies, forgins die, hot shear baldes, and extrusion tooling.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 207
Density [g/cm3]: 7.84
Thermal conductivity [W/m.K]: 18.9
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC | 20-200oC | 20-400oC | 20-600oC |
| 9.8 | 11.0 | 12.1 | 13.0 |
Soft Annealing
Heat to 820-840oC, cool slowly in furnace. Time is 4-6 hours. This will produce a maximum Brindle hardness of 220.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx.650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 1000-1050oC followed by oil, air quenching or warm bath quenching approx. 540oC. Hardness after quenching is 54 HRC.
Tempering
Tempering temperature: 520-700oC, at least 2-3x.
Forging
Hot forming temperature: 1100-850oC.
Machinability
75-80% of a 1% carbon steel.
Corrosion Resistance
Corrosion resistance of this alloy is better than that of plain carbon steels. However, it will rust unless given protective treatment.
Forms manufactured
Please refer to Dimensional Sales Program.
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes. There is no representation that the recipient of this literature will receive updated editions as the become available.
