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H&R M7(Houghton & Richards) - High speed tool steel. Working hardness for industrial applications 66HRC. Latrobe version(Tatmo-VN), contains some Nitrogen. Crucible version (Rex® M7N) also has unspecified amount of Nitrogen and slightly higher content of V and Mo. Balanced toughness and wear resistance, optimized for cutting tools. At 66HRC it should be slightly more wear resistant and less tough than AISI M2 tool steel.
Manufacturing Technology - Ingot
Country - United States(US)
- Proprietary Equivalents
- ? - Motuf
- Akers - Alpha7
- Allegheny Ludlum - LMW-V
- Bohler-Uddeholm - S400
- Carpenter - Seven Star
- Crucible - Rex M7
- Deutsche Edelstahlwerke - Mo19
- Dorrenberg - DMo9V
- Dorrenberg - DMo5V
- Erasteel - EM7
- Geruk - GPM7
- Heye - HYM7
- Kind & Co - B94
- Latrobe - Tatmo V
- Latrobe - Tatmo VN
- Metal Ravne - BR885
- Nachi Fujikoshi - HM7
- Platestahl - SVX822
- Rochling - GigantM9V
- SIJ Metal Ravne D.O.O. - SIRapid 3348
- Simonds - Molva C
- TES - Thyrapid3348
- Thyssen-Krupp - 3348
- Universal Cyclops - Motung CV
- Vasco Metal - Vasco M7
- Villares Metals - VWM7
NOTE - Approximate composition based on manufacturer's or standard reference information and other alloys in the same reference group is shown.
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