| PDF Export | |
NO. 1.2842/DIN 90MnCrV8/AISI O2
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 | - | - |
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 10-6 oC-1
| 20-100oC | 20-200oC | 20-300oC | 20-400oC | 20-500oC | 20-600oC | 20-700oC |
| 12.1 | 13.3 | 13.8 | 14.3 | 14.1 | 14.2 | 14.6 |
Soft Annealing
Heat to 690-720oC, 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 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 790-820oC followed by oil or warm bath (180-220oC) quenching. Hardness after quenching is 63-65 HRC.
Tempering Temperature (oC) vs. Hardness (HRC)
| 100oC | 200oC | 300oC | 400oC | 500oC | 600oC |
| 63 | 60 | 56 | 50 | 42 | 38 |
Forging
Hot forming temperature: 1050-850oC.
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 purposes. There is no representation that the recipient of this literature will receive updated editions as it becomes available.
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 | - | - |
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 10-6 oC-1
| 20-100oC | 20-200oC | 20-300oC | 20-400oC | 20-500oC | 20-600oC | 20-700oC |
| 12.1 | 13.3 | 13.8 | 14.3 | 14.1 | 14.2 | 14.6 |
Soft Annealing
Heat to 690-720oC, 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 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 790-820oC followed by oil or warm bath (180-220oC) quenching. Hardness after quenching is 63-65 HRC.
Tempering Temperature (oC) vs. Hardness (HRC)
| 100oC | 200oC | 300oC | 400oC | 500oC | 600oC |
| 63 | 60 | 56 | 50 | 42 | 38 |
Forging
Hot forming temperature: 1050-850oC.
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 purposes. There is no representation that the recipient of this literature will receive updated editions as it becomes available.
