A649 Class 1B Grade 2 - ASTM A 649/A649M-2025

Grade	A649 Class 1B Grade 2
Corresponding Standard	ASTM A649/A649M-2025 Standard Specification for Forged Steel Rolls Used for Corrugating Paper Machinery
Classification	Alloy Steel

A649 Class 1B Grade 2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo
Minimum Value	0.4	0.15	0.6	-	-	0.65	1.55	0.2
Maximum Value	0.6	0.35	0.95	0.025	0.025	0.95	2	0.45

① When vacuum carbon deoxidation (VCD) is used. the silicon content shall be 0.10 % maximum.

A649 Class 1B Grade 2 Mechanical Properties

Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
≥690	≥450	≥14	≥30

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