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Home Material GB /T 9943-2025
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Grade W2Mo9Cr4V2
China ISC T33480
Corresponding Standard GB /T 9943-2025
High-Speed Tool Steels
Classification Tool Steel
W2Mo9Cr4V2 Chemical Element Composition Content (%)
Component C Si ① Mn P S ② Cr Mo W V
Minimum Value 0.95 - 0.15 - - 3.5 8.2 1.5 1.75
Maximum Value 1.05 0.7 0.4 0.03 0.02 4.5 9.2 2.1 2.2
① There is no lower limit specified for the silicon content in electroslag remelted steel.
② Upon the purchaser’s request, special sulfur content requirements may be specified in the contract to improve the machinability of the steel.
W2Mo9Cr4V2 Mechanical Properties
Heat Treatment or Condition
Hardness
HBW
Delivery condition Annealing ① ≤255
test specimen Preheating temperature: 800–900 °C，Quenching temperature: 1190–1210 °C (salt bath furnace) or 1200–1220 °C (box furnace or vacuum furnace)，Quenching medium: oil, salt bath, or nitrogen gas，Tempering temperature: 550 °C ② HRC ≥64 ③
① The hardness in the annealed and cold-drawn condition is permitted to be up to 50 HBW higher than that in the annealed condition.
② Tempering shall be carried out three times: 1 hour each time in a salt bath, and 2 hours each time in a box furnace or vacuum furnace.
③ The quenched and tempered hardness of the test specimens may be exempt from inspection if the supplier can guarantee it.
New and Old Grade Replacement List
Corresponding Standard Grade
GB /T 9943-2008
Grade
China ISC
GB /T 9943-2025
Grade
China ISC
1 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
W2Mo9Cr4V2 SKH58 A600 M7 HS2-9-2 S2-9-2 1.3348 Z100DCWV09-04-02-02 BM7
2 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
W2Mo9Cr4V2 T62942 SKH58 SKH58 SKH58 A600 M7 T11307 HS 2-9-2 S 2-9-2 1.3348 HS 2-9-2 2782 HS 2-9-2
W2Mo9Cr4V2 Corresponding Standards(Same grade name, different standards)
1 GB /T 9943-2008
W2Mo9Cr4V2 T62942
2 GB 9943-1988
W2Mo9Cr4V2
3 GB /T 9943-2025
W2Mo9Cr4V2 T33480

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