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M4 - Molybdenum high speed steel
S692 MICROCLEAN - According to Bohler-Uddeholm, this is High Carbon version of AISI M4. Except they don't list its composition anywhere and I can't guess what is high in their interpretation. If Bohler ever replies to my emails, I'll update this record.
CPM M4 - Crucible High Carbon(HC) modification of M4 steel.
PMD M4 - Dorrenberg-Edelstahl PM high speed steel. Attainable working hardness up to 65HRC.
ASP2004 - ASP 2004 is Erasteel PM version of the AISI M4 tool steel.
DuraTech M4 - Latrobe version of high speed M4 tool steel.
DuraTech Mega4 - Latrobe PM cold work tool steel. Similar to CPM M4 steel, but should be tougher. Very clean alloy.
S692 MICROCLEAN - According to Bohler-Uddeholm, this is High Carbon version of AISI M4. Except they don't list its composition anywhere and I can't guess what is high in their interpretation. If Bohler ever replies to my emails, I'll update this record.
CPM M4 - Crucible High Carbon(HC) modification of M4 steel.
PMD M4 - Dorrenberg-Edelstahl PM high speed steel. Attainable working hardness up to 65HRC.
ASP2004 - ASP 2004 is Erasteel PM version of the AISI M4 tool steel.
DuraTech M4 - Latrobe version of high speed M4 tool steel.
DuraTech Mega4 - Latrobe PM cold work tool steel. Similar to CPM M4 steel, but should be tougher. Very clean alloy.
Alternate designations: M4(AISI), 1.3394(W-Nr), HS654(EN), HS6-5-4(EN), SKH54(JIS), T11304(UNS), A600(ASTM), S693(?), S693 MICROCLEAN(Bohler-Uddeholm), S692 MICROCLEAN(Bohler-Uddeholm), S692(Bohler-Uddeholm), Micro-Melt M4(Carpenter), CPM Rex M4(HC)(Crucible), CPM M4(Crucible), PM M4(Diehl), PMD M4(Dorrenberg Edelstahl), EM4(Erasteel), ASP2004(Erasteel), DuraTech M4(Latrobe), DuraTech Mega4(Latrobe), Mega4(Latrobe), LO-QPM M4(Lohmann), BRM4(Metal Ravne).