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AISI
American Iron and Steel Institute		 1040
SAE
Steel Number		 1040
Classification Carbon Steel
Chemical Element Composition Content (%)
Component C Mn P S
Minimum Value 0.37 0.6 - -
Maximum Value 0.44 0.9 0.03 0.05
Approximate Comparison Table High-Quality Carbon Structural Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
40 U20402 S40C S40C SM40C 1040 G10400 C40E4 C40E
Ck40 		1.1186 C40E
XC42 		40 C40E
080M40

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