USA UNS H41400
SAE
Steel Number
4140H
Corresponding Standard SAE J 1268-2010
Hardenability Bands for Carbon and Alloy H Steels
Classification Alloy Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo
Minimum Value 0.37 0.15 0.65 - - 0.75 - - 0.15
Maximum Value 0.44 0.35 1 0.03 0.04 1.2 0.25 0.35 0.25
Approximate Comparison Table Hardenability Guaranteed Structural Steel
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 SS BS EN/BS
42CrMoH A30425 SCM440H SCM440H SCM440H 4140H H41400 42CrMo4H 42CrMo4 1.7225 42CrMo4
(40CD4)
≈38ХМ 2244 42CrMo4

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