High Speed Steels M42
Description
DIN 1.3247 / M42 is a Cobalt-Molybdenum high speed steel according to DIN standard. The 1.3247 steel can reach high hardness of 70HRC after Quenching and Tempering. 1.3247 tool steel has good red hardness and high temperature hardness. Cutting tools made of 1.3247 steel can be used to cut high temperature iron base and casting alloys. This steel has poor toughness,so the quenching temperature should be low.
Chemical Composition
| C | Cr | Mo | V | W | Co |
|---|---|---|---|---|---|
| 1.1 | 4 | 9.6 | 1.4 | 1.6 | 7.9 |
Standards
| M42 | BM42 | 1.3247 | SKH59 | AFNOR Z85WDCV06-05-04-02 |
Properties
- High wear resistance
- High red hardness
- High toughness
- As a result of its low vanadium content, this grade exhibits good grindability.
- Fine Grain Size and Carbide Particle Size
Applications
- Die Sinking Cutters
- Milling Cutters
- Engraving Machines
- Tool Bits
- Cold Extrusion Rams
- Hobs
- Precision Broach
- Lathe Tools
Heat Treatment
| 1st Heating °C | 2nd and 3rd | Hardening1 °C Quenching Tempering °C Hardness after pre-heating °C pre-heating °C tempering HRC | |||
|---|---|---|---|---|---|
| up to approx. 400 in an air-circulating furnace | a) 850 | 1160-1190 | a) Saltbath, 550 C | at least three times 530-560 | 66-69 |
| b) 850 and 1050 | b)Oil | ||||
| c) Air | |||||
