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Mat.No. 1.2550, DIN 60WCrV7, AISI S1
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Designation by Standards Mat. No. DIN EN AISI 1.2550 60WCrV7 - S1 Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.60 0.85 0.30 1.05 - - 0.15 1.45 - Description This steel is one of the shock resisting tool steel types with very good thoughness in combination with high hardenability. Impact-resistant, tungsten-alloyed cold-work tool. Applications For cutting tools (dies, punchers) for plate, woodworking tools, blanking dies for cutting sheet metals up to 12 mm...
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Designation by Standards
| Mat. No. | DIN | EN | AISI |
| 1.2550 | 60WCrV7 | - | S1 |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.60 | 0.85 | 0.30 | 1.05 | - | - | 0.15 | 1.45 | - |
Description
This steel is one of the shock resisting tool steel types with very good thoughness in combination with high hardenability. Impact-resistant, tungsten-alloyed cold-work tool.
Applications
For cutting tools (dies, punchers) for plate, woodworking tools, blanking dies for cutting sheet metals up to 12 mm thickness, trimming and spliting dies, cold piercing punches, performing punches, shear blades, chipping knives, pneumatic chisels, coining tools, cold shear blades, ejectors.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 190-210
Density [g/cm3]: 7.93
Thermal conductivity [W/m.K]: 25.0
Electric resistivity [Ohm mm2/m]: 0.30
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC | 20-200oC | 20-300oC | 20-400oC | 20-500oC |
| 11.0 | 12.5 | 13.0 | 13.5 | 14.9 |
Soft Annealing
Heat to 710-750oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 225.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to 650oC, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 860-900oC followed by oil or hot bath (180-220oC) quenching. Hardness after quenching is 60 HRC.
Tempering
Tempering temperature: See the data bellow.
Tempering Temperature (oC) vs. Hardness (HRC)
| 100oC | 200oC | 300oC | 400oC | 500oC | 600oC |
| 60 | 58 | 56 | 52 | 48 | 43 |
Tempering Diagram
Forging
Hot forming temperature: 1050-900oC.
Machinability
No data.
Corrosion Resistance
Corrosion resistance of this alloy is better than that of plain carbon steels. However it will rust unless given protective treatment.
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 puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.
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