31CrV3, 31CrV2, 1.2208 - Tool steel for cold working according to DIN 17350.
| Standard | Steel Grade | |||||||
|---|---|---|---|---|---|---|---|---|
| Chemical composition % | ||||||||
| C: | Mn: | Si: | P: | S: | Cr: | V: | Cu: | |
| DIN | 31CrV3 - 31CrV2 - 1.2208 | |||||||
| 0.28 - 0.35 | 0.40 - 0.60 | 0.25 - 0.40 | <0.030 | <0.030 | 0.40 - 0.70 | 0.07 - 0.12 | - | |
| STAS | 31VCr5 | |||||||
| 0.28 - 0.35 | 0.40 - 0.60 | 0.25 - 0.40 | <0.030 | <0.030 | 0.40 - 0.70 | 0.07 - 0.12 | <0.3 | |
| NF | 31CV3 | |||||||
| 0.28 - 0.35 | 0.40 - 0.60 | 0.25 - 0.40 | <0.030 | <0.030 | 0.40 - 0.70 | 0.07 - 0.12 | - | |
| GOST | 3ChF - 3ХФ | |||||||
| 0.28 - 0.35 | 0.40 - 0.60 | 0.25 - 0.40 | <0.030 | <0.030 | 0.40 - 0.70 | 0.07 - 0.12 | - | |
31CrV2, 1.2208 - specification and application
Cold working tool steel for basic everyday mechanical tools such as screwdrivers, wrenches, screwdrivers, sockets. Water-hardening steel.
Mechanical properties:
- Annealed condition +A: <220 HB
- Hardness after hardening: 52-54 HRC
- Hardness after tempering at temperature:
- 100C = 52 HRC
- 200C = 50 HRC
- 300C = 47 HRC
- 400C = 43 HRC
- 500C = 44 HRC
Heat treatment
- Softening annealing at 700 +/-20C with air cooling
- Hardening at a temperature of 845 +/-15C with water cooling
- Stress relief annealing at a temperature of 665 - 15C
In the above mentioned grades the company delivers:
Other designations of the grade:
31VCr5, 31CV3, 3ChF, 3ХФ