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Special Steels

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P/M High speed Tool Steels

  • No segregates and uniformly finer carbide, compared to conventional melting high speed steel
  • Fine carbide and crystal grain, high toughness
  • Stable performance that certain grindability and less deformation after heat treatment
  • Excellent Hot Workability and becoming it is possible a high alloy. Superior wear resistance

Steel grade and applications

NACHI
Grade
Chemical Composition
(Wt%)
JIS AISI
Grade
Main application
C Cr W Mo V Co
FAX31 1.3 4.0 6.0 5.0 3.0 - - SKH53,
M3-2
Cutting tool (Pinion cutter, Hob)
Mold (Die)
FAX38 1.3 4.0 6.0 5.0 3.0 8.0
Cutting tool (Broach, Hob,
Shaving cutter, Drill, Reamer)
Mold (Die)
FAX40 1.3 4.0 9.5 3.5 3.0 9.5 SKH57 Cutting tool (Bandsaw)
Mold (Die)
FAX55 1.6 4.0 12.0 - - 5.0 5.0 SKH10,
T15
Cutting tool (Broach, Pinion cutter, Gauge)
Mold (Die)
FAXG1 - - - - - - - - - - - -
Cutting tool (Endmill, Broach)
Mold (Die)
FAXG2 - - - - - - - - - - - -
Cutting tool (Broach, Bandsaw)
Mold (Die)

Heat treatment conditions

NACHI
Grade
Annealed hardness
(HB)
Austenitizing Tempering
Practical hardness
(HRC)
Temperature Cooling Temperature Times
FAX31 Less than 285 1,1301,210°C A·O·H " " 6266
FAX38 Less than 285 1,1601,210°C A·O·H " " 6568
FAX40 Less than 285 1,1301,240°C A·O·H " " 6369
FAX55 Less than 285 1,2001,240°C A·O·H " " 6669
FAXG1 Less than 320 1,1401,210°C A·O·H " " 6670
FAXG2 Less than 320 1,1401,200°C A·O·H " " 6669
(Remarks) Cooling method A:Air or Gas O:Oil H:Hot bath