AISI
American Iron and Steel Institute
4142
ASTM
Specification or Grade
L7
Other Names
Corresponding Standard ASTM A 320-2000
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service
Classification Alloy Steel
Properties Strength Quench Hardness
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Mo
Minimum Value 0.4 0.15 0.75 - - 0.8 0.15
Maximum Value 0.45 0.35 1 0.035 0.04 1.1 0.25
Approximate Comparison Table Structural Alloy Steel
Japan United States
JIS ASTM AISI
SNB7 A193 B7 4140
4142
4145

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