A513 Tube is typically available in hot rolled black or hot rolled P&O (Pickeled and Oiled). Alro stocks HREW, which stands for hot rolled electric welded tube. A513 Type 1 has closer dimensional tolerance than A500 tube and A513 Type 1 allows bending. Alro also stocks: Epoxzkote® Pipe Square Tube - Grade A513; ASTM A513-T5 Round Tube