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Home Material JIS G 4403-2022
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Grade SKH 59
Corresponding Standard JIS G 4403-2022
High Speed Tool Steels
Classification Tool Steel
SKH 59 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu Mo W V Co
Minimum Value 1.05 - - - - 3.5 - 9 1.2 0.9 7.5
Maximum Value 1.15 0.7 0.4 0.03 0.03 4.5 0.25 10 1.9 1.3 8.5
SKH 59 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Bar, forging Annealing ≤277
sample Quenching + Tempering HV: 865
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
SKH59 HS2-9-1-8
(S 2-10-1-8) 		HS2-9-1-8 1.3247 HS2-9-1-8 1.3247
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/AISI ISO DIN EN/DIN BS EN/BS
W2Mo9Cr4VCo8 SKH59 SKH59 M42 HS2-9-1-8 S2-10-1-8 BM42
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
SKH59 Corresponding Standards(Same grade name, different standards)
1 JIS G 4403-2005
SKH 59
2 JIS G 4403-2022
SKH 59

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