A757 Grade E1Q Type Ni-Cr-Mo - ASTM A757/A757M-2022

Grade	A757 Grade E1Q
Other Names
Corresponding Standard	ASTM A757/A757M-2022 Standard Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing and Other Applications, for Low-Temperature Service
Classification	Cast Steel

A757 Grade E1Q Chemical Element Composition Content (%)

Component	C	Si	Mn	P ^①	S ^①	Cr	Ni	Cu ^①	Mo	V ^①
Minimum Value	-	-	0.5	-	-	1.35	2.5	-	0.35	-
Maximum Value	0.22	0.6	0.8	0.025	0.025	1.85	3.5	0.5	0.6	0.03

① The total content of these elements shall not exceed 0.70 % including phosphorus and sulfur.

A757 Grade E1Q Mechanical Properties

	Test Temperature	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
		QT=Quenched and tempered	≥620	≥450	≥22	≥40
	-73 ℃	QT=Quenched and tempered					≥41

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