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Home Material GB /T 9943-2008
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Grade W18Cr4V
China ISC T51841
Corresponding Standard GB /T 9943-2008
High-Speed Tool Steels
Classification Tool Steel
W18Cr4V Chemical Element Composition Content (%)
Component C Si ① Mn P S ② Cr Ni ③ Cu ③ W V
Minimum Value 0.73 0.2 0.1 - - 3.8 - - 17.2 1
Maximum Value 0.83 0.4 0.4 0.03 0.03 4.5 0.3 0.25 18.7 1.2
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.
W18Cr4V Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Delivery condition Annealing ≤255
sample Quenching and Tempering HRC
≥63
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.
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 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 SS14 BS EN/BS
W18Cr4V SKH
SKH2 		T1 HS18-0-1 HS18-0-1 Z80WCV18-04-01 HS18-0-1 1.3355 R18 2750 BT1
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
W18Cr4V SKH2 SKH2 T1 HS18-0-1 S18-0-1 BT1
3 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
W18Cr4V T51841 SKH 2 SKH 2 SKH 2 T1 T12001 HS 18-0-1 S 18-0-1 1.3355 HS 18-0-1 Р18 2750 HS 18-0-1
BT1
4 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 W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
W18Cr4V SKH2 SKH2 T1 T12001 HS18-0-1
S18-0-1
X75WCrV18-4-1 		1.3355 18-04-01
HS18-0-1
Z80WCV
Z80WCV18-04-01 		HS18-0-1
HSv18-0-1
X75WCrV18-4-1 		1.3355 Р18
R18 		2750 3355
BT1
W18Cr4V Corresponding Standards(Same grade name, different standards)
1 GB /T 9943-2008
W18Cr4V T51841
2 GB /T 3080-2001
W18Cr4V T51841
3 GB 9943-1988
W18Cr4V
4 GB /T 9943-2025
W18Cr4V T33550

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