L7M L70 - ASTM A 320-2000

AISI American Iron and Steel Institute	4145
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	High Strength High Hardenability

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	0.035	0.04	1.1	0.25

1 Approximate Comparison Table Structural Alloy Steel

2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!