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USA UNS G51450
AISI
American Iron and Steel Institute		 5145
Corresponding Standard ASTM A29/A29M-2012
General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Classification Alloy Steel
Chemical Element Composition Content (%)
Component C Si ① Mn P S Cr Ni ② Cu ② Mo ② More
Minimum Value 0.43 0.15 0.7 - - 0.7 - - - ③
Maximum Value 0.48 0.35 0.9 0.035 0.04 0.9 0.25 0.35 0.06
1 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
2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan United States
GB JIS ASTM
ML45Cr SCr445 5145
3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan United States
YB GB JIS ASTM
QML45Cr ML45Cr SCr445 5145

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