A678 Grade A - ASTM A 678/A678M-2000

Grade	A678 Grade A
Corresponding Standard	ASTM A678/A678M-2000 Standard Specification for Quenched-and-Tempered Carbon and High-Strength Low-Alloy Structural Steel Plates
Classification	Carbon Steel

A678 Grade A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cu
Minimum Value	-	0.15	0.9	-	-	0.2
Maximum Value	0.16	0.5	1.5	0.035	0.04	-

* Boron may be added only by agreement between the producer and the purchaser.
* Small amounts of alloying elements may be present, but will not exceed the following amounts: Cu-0.35; Ni-0.25; Cr-0.25; Mo-0.08.

A678 Grade A Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t≤40	485~620	≥345	≥22

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