ASTM A709Gr.50W Weathering steel Table

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ASTM A709Gr.50W Weathering steel covers high strength, low allow steel structural shapes, ASTM A709Gr.50W Weathering steel plates and ASTM A709Gr.50W Weathering steel bars. The atmospheric corrosion resistance of this steel in most environments is substantially better than carbon steel with or without copper addition. ASTM A709-50W shall have an atmospheric corrosion index of 6.00 or higher.

 

ASTM A709Gr.50W Weathering steel Chemical composition(%)

Maximum Diameter	C max, %	Mn max, %	P max,%	S max,%	Si
					≤40	≥40
4 [100]	0.23	1.35	0.04	0.05	0.4	0.15-0.40
Type	Elements	Heat Analysis, %
1	Columbium	0.005–0.05
2	Vanadium	0.01–0.15
3	Columbium	0.005–0.05
	Vanadium	0.01–0.15
	Columbium plus vanadium	0.02–0.15
5	Titanium	0.006–0.04
	Nitrogen	0.003–0.015
	Vanadium	0.06 max

 ASTM A709Gr.50W Weathering steel Mechanical properties

Grade	Thick mm	Yield  [MPa] Min	Tensile [MPa]	Elongtation Min %				reduction Min %	HB
				Steel Plate		Structural steel
				200mm	50mm	200mm	50mm
ASTM A709Gr.50W	≤100	345	450min	18	21	18	21

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