SA540 GradeB23 Class4 E-4340-H SA540M-B23 CL4 - ASME SA-540/SA540M-1993

Grade	SA540 GradeB23 Class4
Other Names
Corresponding Standard	ASME SA-540/SA540M-1993 Specification for Alloy Steel Bolting Materials for Special Applications
Classification	Alloy Steel

SA540 GradeB23 Class4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P ^*	S ^*	Cr	Ni	Mo
Minimum Value	0.37	0.15	0.6	-	-	0.65	1.55	0.2
Maximum Value	0.44	0.35	0.95	0.025	0.025	0.95	2	0.3

SA540 GradeB23 Class4 Mechanical Properties

diameter d mm	Mark	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
d≤76.2	class3	≥931	≥827	≥13	≥45	269~341
76.2<d≤152.4	class3	≥931	≥827	≥13	≥45	277~352
152.4<d≤241.3	class3	≥931	≥827	≥13	≥45	285~363

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