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Grade SKH 58
Corresponding Standard JIS G 4403-2005
High speed tool steels
Classification Tool Steel
SKH 58 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu Mo W V
Minimum Value 0.95 - - - - 3.5 - 8.2 1.5 1.7
Maximum Value 1.05 0.7 0.4 0.03 0.03 4.5 0.25 9.2 2.1 2.2
SKH 58 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Bar, forging Annealing ≤269
Bar, forging Quenching + 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
SKH58 HS2-9-2 HS2-9-2
(S 2-9-2) 		1.3348 HS2-9-2 1.3348
2 Approximate Comparison Table
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 SK H58 M7 HS2-9-2 S2-9-2 1.3348 Z100DCWV09-04-02-02 BM7
3 Approximate Comparison Table
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 M7 T11307 HS 2-9-2 S 2-9-2 1.3348 HS 2-9-2 2782 HS 2-9-2
SKH58 Corresponding Standards(Same grade name, different standards)
1 JIS G 4403-2005
SKH 58
2 JIS G 4403-2022
SKH 58

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