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Grade SKH 57
Corresponding Standard JIS G 4403-2005
High speed tool steels
Classification Tool Steel
SKH 57 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu Mo W V Co
Minimum Value 1.2 - - - - 3.8 - 3.2 9 3 9.5
Maximum Value 1.35 0.45 0.4 0.03 0.03 4.5 0.25 3.9 10 3.5 10.5
SKH 57 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Bar, forging Annealing ≤293
Bar, forging Quenching + Tempering HRC
≥66
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
SKH57 HS10-4-3-10 HS10-4-3-10
(S 10-4-3-10) 		1.3207 HS10-4-3-10 1.3207
2 Approximate Comparison Table High-Speed Steel 3
Japan Germany France European Standard Sweden United Kingdom
JIS DIN EN/DIN NF EN/NF EN Numerical Grade SS BS EN/BS
SKH57 S10-4-3-10 Z130WKCDV HS10-4-3-10 1.3207 2736 BT42
3 Approximate Comparison Table High-Speed Steel 3
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM ISO EN
W10Mo4Cr4V3Co10 T71010 SKH57 M48 HS 10-4-3-10 HS 10-4-3-10
SKH57 Corresponding Standards(Same grade name, different standards)
1 JIS G 4403-2005
SKH 57
2 JIS G 4403-2022
SKH 57

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