what's the normal standard of the hot rolled steel square tube?

The normal standard are  GB/T6728:2002 , ASTM A500 , JIS G3466 , EN10210 ,EN10219, ASTM A500 Gr. A.B.C.

Steel Grade: Q195-Q235 , Q345 , S235, S355, S235JR, S355JR.STK400/500

Previous:how much zinc coating does the pre-galvanized steel pipe have normally?

Next:how to calculate the weight of black round steel pipe?