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 .

Datasheet :

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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

Impact toughness

Hardness

  • Soft annealed : max 280 HB
  • Cold drawn : max 320 HB
  • Cold rolled : max 320 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).

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