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Home Material GB /T 9943-2008
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Grade W2Mo9Cr4VCo8
China ISC T72948
Corresponding Standard GB /T 9943-2008
High-Speed Tool Steels
Classification Tool Steel
W2Mo9Cr4VCo8 Chemical Element Composition Content (%)
Component C Si ① Mn P S ② Cr Ni ③ Cu ③ Mo W V Co
Minimum Value 1.05 0.15 0.15 - - 3.5 - - 9 1.15 0.95 7.75
Maximum Value 1.15 0.65 0.4 0.03 0.03 4.25 0.3 0.25 10 1.85 1.35 8.75
① The lower limit of silicon content in electro-slag steel is not specified.
② Upon the request of the buyer, to improve the machinability of the steel, the sulfur content may be specified as 0.06% to 0.15%.
③ Cu and Ni are residual contents.
W2Mo9Cr4VCo8 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Delivery condition Annealing ≤269
sample Quenching and Tempering HRC
≥66
Notes:
① When the tempering temperature is 550 to 570°C, temper twice, each time for 1 hour; when the tempering temperature is 540 to 560°C, temper twice, each time for 2 hours; when the tempering temperature is 530 to 550°C, temper three times, each time for 2 hours.
② For annealed and cold-drawn condition, the hardness may be allowed to increase by 50 HBW over the annealed condition.
1 Approximate Comparison Table High-Speed Tool Steels
China Japan South Korea United States International Organization for Standardization Germany United Kingdom
GB JIS KS ASTM/AISI ISO DIN EN/DIN BS EN/BS
W2Mo9Cr4VCo8 SKH59 SKH59 M42 HS2-9-1-8 S2-10-1-8 BM42
2 Approximate Comparison Table High-Speed Steel 1
China Japan United States International Organization for Standardization Germany France United Kingdom
GB JIS ASTM ISO DIN EN/DIN W-Nr. NF EN/NF BS EN/BS
W2Mo9Cr4VCo8 YXM34 M33
M34 		HS2-9-1-8 S2-9-2-8 1.3249 Z110DKCWV09-08-04-02-01 BM34
3 Approximate Comparison Table High-Speed Steel 2
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF SS14 BS EN/BS
W2Mo9Cr4VCo8 T72948 SKH59 SKH59 SKH59 M42 T11342 HS 2-9-1-8 S 2-10-1-8 1.3247 HS 2-9-1-8 2716 HS 2-9-1-8
BM42
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
W2Mo9Cr4VCo8 T72948 SKH59 M42 T11342 HS 2-9-1-8 HS 2-9-1-8 Р2АМ9К5
W2Mo9Cr4VCo8 Corresponding Standards(Same grade name, different standards)
1 GB /T 9943-2008
W2Mo9Cr4VCo8 T72948
2 GB 9943-1988
W2Mo9Cr4VCo8

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