Q1: What is ASTM A500?
A: ASTM A500 is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes, commonly used in the US for hollow structural sections (HSS) in bridges, buildings, and general structural purposes-1-9.
Q2: What is ASTM A501?
A: ASTM A501 is a standard specification for hot-formed welded and seamless carbon steel structural tubing in square, round, rectangular, or special shapes, used for welded, riveted, or bolted construction-1-5.
Q3: What is the primary manufacturing difference between A500 and A501?
A: The key difference is the forming process: A500 covers cold-formed tubing-1-9, while A501 covers hot-formed tubing-1-5.
Q4: What are the standard shapes available under these specifications?
A: Both standards cover round, square, and rectangular shapes-4-5. A500 also includes "special shapes"-4.
Q5: What are the typical applications for A500 and A501 tubing?
A: They are used in the welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes.





