ASME SA656 Grade 70 steel

ASTM SA656 “Standard Specification for Hot-Rolled Structural Steel, High-Strength Low-Alloy Plate with Improved Formability” for Bridges, Buildings, Rolling Stock and Ships. There are five grade in the standard ASTM SA656--Grade 70, Grade 60, Grade 50, Grade 80 and Grade 100 etc. Katalor always keeps thousands of high-strength low-alloy plates and steel structures including SA656 Grade 70.

ASME SA656 Grade 70 Chemical Composition

Grade	Chemical composition %
A656 GR 70	C	Si	Mn	P	S	N	V	Nb
	≤0.18	≤0.60	≤1.65	≤0.025	≤0.035	≤0.020	≤0.15	0.10

ASME SA656 Grade 70 Mechanical Property

Grade	Mechanical Property
A656 GR 70	Tensile Strength(MPa)	Yield Strength(MPa)	Elongation in 2 in. %
	≧550	≧485	≧17

Heat analyses in SA656 Gr.70 shall conform to the chemical requirements given in standard SA656-Table 1. Dependent upon thickness, grade, and intended application, A656 Grade 70 variations in the chemical composition are permitted within the limits given in Table 1 for the applicable type. Where it is of particular importance, the manufacturer should be consulted for specific chemical composition of SA656 Gr.80.

If the material of A656 Gr. 70 is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. The SA656 Gr. 70 plates as represented by the test specimens shall conform to the requirements given in Table 2 for tensile test.