A500 Grade B/C/D seamless pipe/tube
American standard square tube A500GR.B, C, D all adopt the A500 standard issued by the American Standards Association (ASTM), which means that they have certain specifications and guarantees in terms of quality and performance. At the same time, these steels are cold-formed welded and seamless carbon steel materials, suitable for welded, riveted or bolted bridges and building structures, as well as general structural purposes.
