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Home Material GB /T 9943-2008
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Grade W12Cr4V5Co5
China ISC T71245
Corresponding Standard GB /T 9943-2008
High-speed tool steels
Classification Tool Steel
W12Cr4V5Co5 Chemical Element Composition Content (%)
Component C Si ① Mn P S ② Cr Ni ③ Cu ③ W V Co
Minimum Value 1.5 0.15 0.15 - - 3.75 - - 11.75 4.5 4.75
Maximum Value 1.6 0.4 0.4 0.03 0.03 5 0.3 0.25 13 5.25 5.25
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.
W12Cr4V5Co5 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Delivery condition Annealing ≤277
sample Quenching and Tempering HRC
≥65
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
W12Cr4v5Co5 SKH10 SKH10 T15 HS6-5-2 S6-5-2 BT15
2 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
W12Cr4V5Co5 SK H10 T15 HS12-1-5-5 S12-1-4-5 1.3202 Z160WKCV12-05-05-04 Р10К5Ф5 BT15
3 Approximate Comparison Table High-Speed Steel 2
China Taiwan, China Japan South Korea United States Germany France Russia United Kingdom
GB ISC CNS JIS KS ASTM UNS DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
W12Cr4V5Co5 T71245 SKH 10 SKH 10 SKH 10 T15 T12015 S 12-1-4-5 1.3202 HS 12-1-5-5 Р10К5Ф5 HS 12-1-5-5
BT15
W12Cr4V5Co5 Corresponding Standards(Same grade name, different standards)
1 GB /T 9943-2008
W12Cr4V5Co5 T71245
2 GB 9943-1988
W12Cr4V5Co 5

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