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USA UNS G51450
AISI
American Iron and Steel Institute		 5145
Corresponding Standard ASTM A29/A29M-2005
General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Classification Alloy Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo
Minimum Value 0.43 0.15 0.7 - - 0.7 - - -
Maximum Value 0.48 0.35 0.9 0.035 0.04 0.9 0.25 0.35 0.06
Approximate Comparison Table Structural Alloy Steel
China Taiwan, China Japan South Korea United States France European Standard Russia
GB ISC CNS JIS KS ASTM/AISI UNS NF EN/NF EN GOST
45Cr A20452 SCr445 SCr445 SCr445 5145 G51450 45C4 41Cr4 45Х

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