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A709 Gr.50w steel chemical composition,A709 Gr.50w steel mechanical properties

Posted:2015-07-12 23:14:28

A709 Gr.50w steel specification covers carbon and high-strength low-alloy steel structural shapes,plates,and bars and quenched and tempered alloy steel for structural plates intended for use in bridges.

A709 Gr.50w steel chemical composition

Element	Composition,%
Element	Type A	Type B	Type C
C	0.19 max	0.20 max	0.15 max
Mn	0.80-1.25	0.75-1.35	0.80-1.35
P	0.04 max	0.04 max	0.04 max
S	0.05 max	0.05 max	0.05 max
Si	0.30-0.65	0.15-0.50	0.15-0.40
Ni	0.40 max	0.50 max	0.25-0.50
Cr	0.40-0.65	0.40-0.70	0.30-0.50

A709 Gr.50w steel mechanical properties

Grade	Plate thickness,in,[mm]	Structural shape flange or leg thickness,in,[mm]	Yield point or yield strength,ksi,[mpa]	Tensile strength,ksi,[mpa]	Min elongation,%
					Plates and bars		Shapes
					8 in or 200 mm	2 in or 50 mm	8 in or 200 mm	2 in or 50 mm
50w	To 4 [100].incl	All	50[345] min	70[485]min	18	21	18	21

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