Standards: aisi, astm, jis and gb Material: c20 c45 1010 1022 1016 Diameters: 15 to 80mm Lengths: 500mm to 12000mm or customized Surface: black, polished, bright Certifications: iso, sgs and third part inspection Delivery condition : hot forged +rough machined (black surface Terms of payment:t/t Steel market: Products have been all over the country more than 10 countries, municipalities and autonomous regions, and have been exported to south africa, north america, the middle east, africa, asia and other countries .