ASTM A500 cold formed seamless carbon steel structural tubing

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ASTM A500 seamless structure tubing

ASTM A500 tube is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square and rectangular shapes. ASTM A500 is a standard specification published by the ASTM for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. It is commonly specified in the USA for hollow structural sections, but the more stringent CSA G40.21 is preferred in Canada. Another related standard is ASTM A501, which is a hot-formed version of this A500.

CHEMICAL PROPERTIES of ASTM A500

	Grade B	Grade C
Carbon, Max %	0.260	0.230
Manganese, Max %	—-	1.350
Phosphorus, Max %	0.035	0.035
Sulphur, Max %	0.035	0.035
Copper, when copper steel is specified, Min %

SIZES of ASTM A500

Rectangle	Type: HREW	Widths: Rectangles equivalent to 2” sq through 20”
Round	Type: HREW	OD: ¾” – 20” Wall Thickness: .113 – .625
Square	Type: HREW	Widths 2” – 20” Wall Thickness: .125 – .625

*Typically CREW is available in 065 GA and lighter and OD sizes 2” and under
Outside Dimensions

Largest Outside Dimension	Tolerance*
2-1/2” and under	±0.020”
Over 2-1/2” to 3-1/2” inclusive	±0.025”
Over 3-1/2” to 5-1/2” inclusive	±0.030”
Over 5-1/2”	±1%