Grade SKH 3
Corresponding Standard JIS G 4403-2005
High speed tool steels
Classification Tool Steel
SKH 3 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu W V Co
Minimum Value 0.73 - - - - 3.8 - 17 0.8 4.5
Maximum Value 0.83 0.45 0.4 0.03 0.03 4.5 0.25 19 1.2 5.5
SKH 3 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
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
W18Cr4VCo5 SKH3 SKH3 T4 HS18-1-1-5 S18-1-2-5 T4
2 Approximate Comparison Table
China Taiwan, China Japan South Korea United States Germany France Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS DIN EN/DIN W-Nr. NF EN/NF GOST SS14 BS EN/BS
W18Cr4VCo5 T71845 SKH 3 SKH 3 SKH 3 T4 T12004 S 18-1-2-5 1.3255 HS 18-1-2-5 ≈Р18К5Ф2 254 HS 18-1-2-5
BT4
SKH3 Corresponding Standards(Same grade name, different standards)

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