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Home Material SAE J404-2000
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USA UNS G41450
SAE
Steel Number		 4145
Corresponding Standard SAE J404-2000
Chemical Compositions of SAE Alloy Steels
Classification Alloy Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Mo
Minimum Value 0.43 0.15 0.75 - - 0.8 0.15
Maximum Value 0.48 0.35 1 0.03 0.04 1.1 0.25
1 Approximate Comparison Table Structural Alloy Steel
Japan United States
JIS ASTM AISI
SNB7 A193 B7 4140
4142
4145
2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan United States
GB JIS ASTM
ML45CrMo SCM445 4145
3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan United States
YB GB JIS ASTM
QML45CrMo ML45CrMo SCM445 4145

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