ASTM A500 / A500M Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
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ASTM A500 Q235 S235jr S355jr Cold Rolled / Hot Rolled Black Annealed ERW Welded Hollow Section Square Steel Tube
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ASTM A500/A500M-21 - Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
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