E M42
E M42 is a highly cobalt alloyed high speed steel to be used when the demand for hot hardness is of great importance. E M42 has a good machinability and a good wear resistance .
Chemical composition
| C | Cr | Mo | W | Co | V |
|---|---|---|---|---|---|
| 1.08 | 3.8 | 9.4 | 1.5 | 8.0 | 1.2 |
Standards
- Europe : HS 2-9-1-8
- Sweden : SS2723
- Japan : JIS SKH59
- Germany : 1.3247
- USA : AISI M42
Properties
Machinability
Wear Resistance
Toughness
Hot hardness
Grindability
Heat treatment
Delivered Hardness
- Soft annealed : 270 HB
- Cold drawn : 295 HB
- Cold rolled : 295 HB
Characteristics
E M42 can be worked as follows:
- machining (grinding, turning, milling)
- polishing
- hot forming
- electrical discharge machining
- welding (special procedure including preheating and filler materials of base material composition).
Applications
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Round bars Ø 0.6 to 410 mm
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