A290 Grade 4 Class L - ASTM A290/A290M-2016(R2021)

Grade	A290 Grade 4 Class L
Corresponding Standard	ASTM A290/A290M-2016(R2021) Standard Specification for Carbon and Alloy Steel Forgings for Rings for Reduction Gears
Classification	Alloy Steel

A290 Grade 4 Class L Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr	Ni	Cu	Mo	V
Minimum Value	0.35	-	0.6	-	-	0.6	1.65	-	0.2	-
Maximum Value	0.45	0.35	0.9	0.04	0.04	0.9	2	0.35	0.5	0.1

① When vacuum carbon deoxidation is used, silicon maximum shall be 0.10 %.

A290 Grade 4 Class L Mechanical Properties

Hardness HBW
341~401

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