ASTM A500 rectangular tube

Rectangular tube is a hollow long steel material, also known as flat tube, flat square tube or square flat tube (as the name implies). When the bending and torsional strength are the same, the weight is lighter, so it is widely used in manufacturing mechanical parts and engineering structures.

ASTM A500 is a standard specification for seamless and weldable carbon structural steel published by ASTM International. ASTM A500 rectangular tube is a rectangular steel pipe that can be welded, riveted, or bolted for use in bridges or buildings and general structures.

Tensile Properties of ASTM A500 Rectangular Tubes
 

ASTM A500 Rectangular Tube
Minimum stretch(Mpa)	310	400	427	400
Yield Strength (Mpa)	269	317	345	250
Minimum elongation per 50.8mm, %D	25A	13B	21C	23B

Notes
A: Suitable for steel pipes with wall thickness (t) ≥ 3.05mm. For thinner steel pipes, the minimum elongation can be calculated by the following formula: Secondary length per 50.8mm = 56t+17.5, rounded to two decimal places.
B: Suitable for steel pipes with wall thickness (t) ≥ 4.57mm. For thinner steel pipes, the minimum elongation can be calculated by the following formula: Elongation per 50.8mm = 61t+12, rounded to two decimal places.
C: Suitable for steel pipes with wall thickness (t) ≥ 3.05mm. For thinner tubes, the minimum secondary length can be agreed with the manufacturer.

D: The specified minimum elongation is only a reference value for test experiments, not a technical standard for steel pipe trade.

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