A: ASTM A500 Grade B and Grade C. Both are carbon steel, but Grade C has higher minimum yield (50 ksi vs. 46 ksi) and tensile strength (62 ksi vs. 58 ksi) than Grade B.
Q: What is a key advantage of ASTM A513 Type 5 (DOM - Drawn Over Mandrel) welded tubing compared to A500 tubing?
A: A513 DOM tubing undergoes a cold drawing process after welding, resulting in excellent surface finish, tighter dimensional tolerances, high strength, and superior uniformity for precision mechanical applications.
A: ASTM A53 Grade B (Type E or S). While often used for low-pressure service, it's commonly specified for structural columns, handrails, and supports.
Q: For high-strength, low-alloy structural welded tubing, what is a common grade and its key characteristic?
A: ASTM A847 is a high-strength, atmospheric corrosion-resistant steel (often called "weathering steel"). It forms a protective patina, making it suitable for exposed structures without painting.
Q: What is the primary European standard for cold-formed structural hollow sections, and a common grade within it?
A: EN 10219. A common grade is S355J2H, which has a minimum yield strength of 355 MPa and good toughness at 0℃ (as indicated by 'J2').
