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H&R No.7(Houghton & Richards) - High speed tool steel. Higher toughness at the same hardness compared to AISI M2 tool steel. Very popular as competition cutting steel of choice. Mainly used in custom knives, however several makers including Benchmade and Spyderco made limited runs of their knives out of Crucible CPM M4.
Manufacturing Technology - Ingot
Country - United States(US)
- Houghton & Richards H&R No.7 and equivalent steel knives reviews
- Proprietary Equivalents
- Akers - Supra1
- Akers - Alpha4
- Allegheny Ludlum - DBL4
- Assab - ASPM4
- Atlas Steel - Atlas M4
- Bohler-Uddeholm - S692 MICROCLEAN
- Bohler-Uddeholm - S692
- Bohler-Uddeholm - S693
- Bohler-Uddeholm - S693 MICROCLEAN
- Braeburn - Braefour
- Carpenter - Micro-Melt M4
- Carpenter - Four Star
- Carpenter - Carpenter Four Star
- Columbia Steel - Molite42
- Crucible - CPM Rex M4(HC)
- Crucible - CPM M4
- Diehl - PM M4
- Dorrenberg - PMD M4
- Erasteel - ASP2004
- Erasteel - EM4
- Geruk - GPM4
- Heye - HYM4
- Hitachi - XVC11
- Kobelco Steel - KHA33
- Latrobe - DuraTech Mega4
- Latrobe - DuraTech M4
- Latrobe - Stark
- Latrobe - Mega4
- Lindquist Steels - M4PM
- Lohmann - LO-QPM M4
- Metal Ravne - BRM4
- Mitsubishi Steel - MAC-C
- Nachi Fujikoshi - HM4
- Rovalma - CSW20
- SIJ Metal Ravne D.O.O. - SIRapid 3351
- Thyssen-Krupp - TSP4
- Vasco Metal - Neatro
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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