1.What is the fundamental difference between ASTM A500 and A519?
A500 is for structural applications (buildings, bridges), prioritizing weldability and load capacity. A519 is for mechanical components (shafts, cylinders), prioritizing machinability and dimensional precision-9.
2.What does HSS stand for, and which standard covers it?
HSS stands for Hollow Structural Sections. In the U.S., they are most commonly produced to ASTM A500 (Grade C is typical)-1. A newer standard, A1085, offers improved properties for HSS-1-4.
3.Can A500 tubing be seamless?
Yes. A500 covers both cold-formed welded and seamless carbon steel tubing-10.
4.Is A519 tubing ever welded?
No. A519 covers seamless mechanical tubing only-9.
5.What is the outdated term for HSS?
"TS" (for Tube Shape) was used before the industry adopted "HSS" in 1997-1.
