1. Q: What is the primary scope of 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. It is primarily used for welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes.
2. Q: What is the key difference between ASTM A500 and A501?
A: ASTM A501 is for hot-formed welded and seamless carbon steel structural tubing. The main difference is the forming temperature. However, it's important to note that ASTM A501 has been largely withdrawn and superseded by ASTM A500. For most new projects, A500 is the specified standard.
3. Q: What are the common grades (types) in ASTM A500, and how do they differ?
A: ASTM A500 has several grades based on cross-sectional shape:
Grade A: Round, Square, and Rectangular tubing.
Grade B: Round, Square, and Rectangular tubing.
Grade C: Round, Square, and Rectangular tubing.
Grade D: Square and Rectangular tubing only.
The primary difference between them is the minimum yield strength and tensile strength, with Grade B and Grade C generally offering higher strength than Grade A.
4. Q: What are the minimum yield and tensile strength requirements for a Grade B, Round Tube?
A: For a Grade B round tube, the minimum yield strength is 42 ksi (290 MPa), and the minimum tensile strength is 58 ksi (400 MPa).
5. Q: Does ASTM A500 cover both welded and seamless tubing?
A: Yes, ASTM A500 covers both cold-formed welded (electric-resistance welded) and seamless carbon steel tubing. The standard's requirements apply to both, though their manufacturing processes are different.
