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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 0.42 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 tool steels
China Japan United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
W6Mo5Cr4V2 SKH51 M2 HS6-5-2 HS6-5-2 Z85WDCV06-05-04-02 HS6-5-2 1.3339 R6M5
Р6М5 		2722 BM2
2 Approximate Comparison Table High-speed tool steels
China Japan South Korea United States International Organization for Standardization Germany United Kingdom
GB JIS KS ASTM ISO DIN EN/DIN BS EN/BS
W6Mo5Cr4V2 SKH9
(SKH51) 		SKH9 M2 HS6-5-2 S6-5-2 BM2
3 Approximate Comparison Table
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
4 Approximate Comparison Table
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
5 Approximate Comparison Table
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
6 Approximate Comparison Table
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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