Standard: EN10305-1, Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions Non-alloy and alloy steel tubes Application: for seamless circular tubes made of non-alloy and alloy steels for mechanical and gneral engineering purposes. Size range: O.D.: 5-420mm W.T.: 0.5-50mm L:max12000mm Material: 1008,1010,1020,1026,1045,4130,4140, E235, E275, E315, E355, E470 C15, C22, 38Mn6, 41Cr4, 25CrMo4, 30CrMo4, 34CrMo4, 42CrMo4 Delivery condition: Normalizin rolling process or normalized by heat treatment in a furnance. Manufacture: The tubes are manufactured by Seamless Cold Drawn or Seamless Cold Rolling.