1. When should I definitely choose A500?
For any welded building structure, like frames, trusses, columns, or bridges-1-9.
2. When should I definitely choose A519?
For any part requiring significant machining (turning, milling, drilling), like a piston, hydraulic cylinder, or drive shaft-5-9.
3. Can A500 round HSS be used as pipe?
Yes, but there are differences. Round HSS (A500) has tighter straightness tolerances and no allowance for dents compared to standard pipe (A53)-1.
4. Is A519 suitable for high-pressure applications like gas cylinders?
Yes. Specific grades like A519 Gr. 4130 are used for manufacturing large-diameter, high-pressure gas cylinders-2.
5. For an exposed architectural steel element, which is preferable?
A500 HSS is very common for architecturally exposed structural steel-1.
