A515 Grade 70 A515 Grade 485 - ASTM A515/A515M-2017

Grade	A515 Grade 70
Other Names
Corresponding Standard	ASTM A515/A515M-2017 Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-Temperature Service
Classification	Carbon Steel

A515 Grade 70 Chemical Element Composition Content (%)

	Component	C ^①	Si	Mn ^①	P	S
t≤25mm	Minimum Value	-	0.15	-	-	-
t≤25mm	Maximum Value	0.31	0.4	1.2	0.025	0.025

	Component	C ^①	Si	Mn ^①	P	S
25mm＜t≤50mm	Minimum Value	-	0.15	-	-	-
25mm＜t≤50mm	Maximum Value	0.33	0.4	1.2	0.025	0.025

	Component	C ^①	Si	Mn ^①	P	S
t＞50mm	Minimum Value	-	0.15	-	-	-
t＞50mm	Maximum Value	0.35	0.4	1.2	0.025	0.025

① For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50 % by heat analysis and 1.60 % by product analysis.

A515 Grade 70 Mechanical Properties

product	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
plates	485~620	≥260	L0=200mm ≥17
plates	485~620	≥260	L0=50mm ≥21

Heat treatment:
—Plates 2 in. [50 mm] and under in thickness are normally supplied in the as-rolled condition. The plates may be ordered normalized or stress relieved, or both.
—Plates over 2 in. [50 mm] in thickness shall be normalized.

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