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Home Material GB /T 1299-2025
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Grade W6Mo5Cr4V2
China ISC T33390
Corresponding Standard GB /T 1299-2025
Tool and Mould Steels
Classification Tool Steel
W6Mo5Cr4V2 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu Mo W V More
Minimum Value 0.8 0.15 0.2 - - 3.8 - 4.5 5.5 1.75 Cu+Ni≤0.55
Maximum Value 0.9 0.4 0.45 0.03 0.015 4.4 0.25 5.5 6.75 2.2
W6Mo5Cr4V2 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Delivery condition Annealing ≤255
Specimen Preheat to 730-840 ℃, heat to 1210-1230 ℃(controlled atmosphere or salt bath), hold for 5-15 min, oil cool, temper twice at 540-560 ℃(controlled atmosphere or salt bath), each time for 2 h HRC:
≥64(salt bath)
≥63(controlled atmosphere)
New and Old Grade Replacement List
Corresponding Standard Grade
GB /T 1299-2014
Grade
China ISC
GB /T 1299-2025
Grade
China ISC
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 High-Speed Steel 1
China Japan United States International Organization for Standardization Germany France Russia United Kingdom
GB JIS ASTM ISO DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
W6Mo5Cr4V2 SK H51 M2(一般含碳量) HS6-5-2 S6-5-2 1.3343 Z85WDCV06-05-04-02 Р6М3 BM2
4 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
5 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
W6Mo5Cr4V2 Corresponding Standards(Same grade name, different standards)
1 GB /T 1299-2014
W6Mo5Cr4V2 T21830
2 GB /T 9943-2008
W6Mo5Cr4V2 T66541
3 YB /T 084-2016
W6Mo5Cr4V2
4 GB /T 3080-2001
W6Mo5Cr4V2 T66541
5 JB /T 7715-1995
W6Mo5Cr4V2
6 GB 9943-1988
W6Mo5Cr4V2
7 GB /T 1299-2025
W6Mo5Cr4V2 T33390

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