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Specifications
Designation by Standards
| Mat. No. | DIN | EN | AISI |
| 1.2842 | 90MnCrV8 | 90MnV8 | O2 |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.90 | 0.25 | 2.00 | 0.35 | - | - | 0.13 | - | - |
Description:
Cold work tool steel with high dimensional stability at heat treatment. Very high resistance to cracking. High machinability, medium toughness and resistance to wear.
Applications:
Measuring tools, machine knives for the wood, paper and metal industry, cold cutting shear blades, thread cutting tools.
Physical properties (average values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.85
Thermal conductivity [W/m.K]: 30.0
Electric resistivity [Ohm mm2/m]: 0.35
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10ˉ6 °C-1
| 20-100°C | 20-200°C | 20-300°C | 20-400°C | 20-500°C | 20-600°C | 20-700°C |
| 12.1 | 13.3 | 13.8 | 14.3 | 14.1 | 14.2 | 14.6 |
Soft Annealing:
Heat to 690-720°C, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.
Stress Relieving:
Stress relieving to remove machining stresses should be carried out by heating to 650°C, 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 790-820°C followed by oil or warm bath (180-220°C) quenching. Hardness after quenching is 63-65 HRC.
Tempering:
Tempering temperature: See the data bellow.
Tempering Temperature (°C) vs. Hardness (HRC)
| 100°C | 200°C | 300°C | 400°C | 500°C | 600°C |
| 63 | 60 | 56 | 50 | 42 | 38 |
Forging:
Hot forming temperature: 1050-850°C.
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.
| Item | Dimension (mm) | Process | Delivery condition |
| Round Bar | DIA1.0 - 30 | Cold-drawing / Centerless grinding | Bright & Anneal |
| DIA20 - 80 | Peeling | Bright & Anneal | |
| DIA 13-180 | Hot Rolled | Black surface & Anneal | |
| DIA 70 - 400 | Hot Rolled | Black surface & Anneal | |
| Flat Bar | T 3.0-20 X W 20-100 | Hot Rolled | Black surface & Anneal |
| Block | T 20-200 X 300-800 | Hot Rolled & Hot Forged | Black surface /Machine & Anneal |
| Wire Rod | DIA 5.5 - 13 | Hot Rolled | Black surface & Anneal |
| Sheets | T1.0 - 2.5 | Cold Rolled | Black surface & Anneal |
| T 2.5 - 8.0 | Hot Rolled | Black surface & Anneal |
