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Grade A600 M2
USA UNS T11302
AISI
American Iron and Steel Institute		 M2
Other Names
Corresponding Standard ASTM A600-1992(R2010)
Standard Specification for Tool Steel High Speed
Classification Tool Steel
A600 M2 Chemical Element Composition Content (%)
  Component C Si Mn P S Cr Mo W V More
regluar C Minimum Value 0.78 0.2 0.15 - - 3.75 4.5 5.5 1.75 Ni+Cu≤ 0.75
Maximum Value 0.88 0.45 0.4 0.03 0.03 4.5 5.5 6.75 2.2
  Component C Si Mn P S Cr Mo W V More
high C Minimum Value 0.95 0.2 0.15 - - 3.75 4.5 5.5 1.75 Ni+Cu≤ 0.75
Maximum Value 1.05 0.45 0.4 0.03 0.03 4.5 5.5 6.75 2.2
* Where specified, sulfur may be 0.06 to 0.15% to improve machinability.
A600 M2 Mechanical Properties
Heat Treatment or Condition
Hardness
HBW
high C Cold Drawing ≤269
Cold Drawn and Annealed ≤262
Annealing ≤255
heat treated① HRC
≥65
regluar C Cold Drawing ≤262
Cold Drawn and Annealed ≤255
Annealing ≤248
heat treated② HRC
≥64
1 Approximate Comparison Table High-Speed Steel 2
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST SS14 BS EN/BS
W6Mo5Cr4V2 T66541 SKH 51 SKH 51 SKH 51 M2(正常C) T11302 HS 6-5-2 S 6-5-2 1.3339 HS 6-5-2 Р6М5 2722 HS 6-5-2
BM2
2 Approximate Comparison Table High-Speed Steel 4
China Japan South Korea United States Germany France European Standard Russia Sweden United Kingdom
GB JIS KS ASTM UNS DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
W6Mo5Cr4V2 SKH51 SKH51 M2 T11302 HS6-5-2
S6-5-2
S6-5-2S
SC6-5-2
X82WMoCrV6-5-4 		HS6-5-2
HS6-5-2HC
X85WMoCrV6-5-4
Z85WDCV 		HS6-5-2
HS6-5-2C 		1.3339
1.3343 		Р6М5
R6M5 		2722 3343
BM2
3 Approximate Comparison Table High-Speed Steel 2
China United States Germany France
GB ISC ASTM UNS DIN EN/DIN W-Nr. NF EN/NF
CW6Mo5Cr4V2 T66542 M2(高C) T11302 SC 6-5-2 1.3342 HS 6-5-2C
4 Approximate Comparison Table High-Speed Steel 3
China Japan United States International Organization for Standardization European Standard Russia
GB ISC JIS ASTM UNS ISO EN GOST
CW6Mo5Cr4V2 T66542 SKH51 M2 T11302 HS 6-5-2C HS 6-5-2C Р6М5Ф3

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