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Grade SUP4
Classification Spring Steel
SUP4 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu
Minimum Value 0.9 0.15 0.3 - - - -
Maximum Value 1.1 0.35 0.6 0.035 0.035 0.2 0.35
1 Approximate Comparison Table Spring Steel
Japan United States Germany France Sweden United Kingdom
JIS AISI UNS DIN EN/DIN W-Nr. NF EN/NF SS14 BS EN/BS
SUP4 1095 G10950 Ck101 1.1274 XC100 1870 060A96
2 Approximate Comparison Table Spring Steel 1
China Japan United States Russia United Kingdom
GB JIS ASTM GOST BS EN/BS
85 SUP4 1095 85 080A83

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