Technical specification Steel grade: St 52.3N / St 52.0 / St 52 bk+s Straightness: 1 : 1.000 mm Tolerance O.D.: acc. DIN 2391 cold drawn acc. DIN 2448/1629 hot rolled Tolerance I.D.: acc. ISO H8 (H9 / H10) depending on size Roughness: Ra max. 0,5 µm Random lengths: 6.000 – 9.000 mm Material identification Each tube is marked with code number which always enables to find a chemical composition certificate for the given source product. Each tube is delivered with quality certificate[...]

full range starting from dia. 6,00 mm Chrome layer min. 25my; tol. f7 also offered as induction hardened; Ni-cr;[...]