SA738M Grade A - ASME SA-738/SA-738M-2023 - H2ABC

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Grade	SA738M Grade A
Corresponding Standard	ASME SA-738/SA-738M-2023 Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service
Classification	Alloy Steel

SA738M Grade A Chemical Element Composition Content (%)

	Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Nb	More
t≤65mm	Minimum Value	-	0.15	-	-	-	-	-	-	-	-	-	Nb+V≤0.08
t≤65mm	Maximum Value	0.24	0.5	1.5	0.025	0.025	0.25	0.5	0.35	0.08	0.07	0.04	Nb+V≤0.08

	Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Nb	More
t＞65mm	Minimum Value	-	0.15	-	-	-	-	-	-	-	-	-	Nb+V≤0.08
t＞65mm	Maximum Value	0.24	0.5	1.6	0.025	0.025	0.25	0.5	0.35	0.08	0.07	0.04	Nb+V≤0.08

SA738M Grade A Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤65	515~655	≥310	≥20	-45°C: 27 (Longitudinal) -30°C: 27 (Transverse)
65＜t≤100	515~655	≥310	≥20	-45°C: 27 (Longitudinal) -30°C: 27 (Transverse)
t＞100	515~655	≥310	≥20	-45°C: 27 (Longitudinal) -30°C: 27 (Transverse)

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