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Grade HS 6-5-2
ISO Numeric Designation 1.3339
Corresponding Standard ISO 4957-2018
Tool Steels
Classification Alloy Steel
Density 8.2 g/cm3
HS 6-5-2 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Mo W V
Minimum Value 0.8 - - - - 3.8 4.7 5.9 1.7
Maximum Value 0.88 0.45 0.4 0.03 0.03 4.5 5.2 6.7 2.1
HS 6-5-2 Mechanical Properties
Hardness
HBW
Soft annealing (+A) ≤262
Quenching and Tempering HRC
≥64
1 Approximate Comparison Table High-Speed Tool Steels
Japan International Organization for Standardization Germany European Standard
JIS ISO DIN EN/DIN W-Nr. EN Numerical Grade
SKH51 HS6-5-2 HS6-5-2
(S 6-5-2S) 		1.3339
(1.3341) 		HS6-5-2 1.3339
2 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
3 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
4 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
5 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
6 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
HS6-5-2 Corresponding Standards(Same grade name, different standards)
1 DIN EN ISO 4957-2018
HS 6-5-2 1.3339
2 ISO 4957-2018
HS 6-5-2 1.3339

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