Honed Tube

honed tube GradeST45.8, ST 52 Metric size O.D: 30 to 700mm, Max length 12m. Straightness: 0.5 -1.0/1000 Tolerance EXT: DIN 2391 Tolerance INT: ISO H8 Roughness(Ra): 0.2 to 0.4µ Type: cold drawing, cold rolling, honed CHEMICAL COMPOSITION (%) Si Mn C P (Max.) S(Max) 0.50Max <=1.6 0.22Max 0.025 0.025 MECHANICAL PROPERTIES Tensile strength Min Yield Point Min Elongation % Min DELIVERY CONDITION 580N/mm2 420N/mm2 10 STRESS RELIEVED BKS Marking: JW, material grade, specification Length: unbending length or fix length Package: steel strip bundle, knitting strip bundle or steel box. Conservation: Anti rust oiled inside and outside surface, cap in both end. Weld ability: very good weld ability according to the common welding system. Impact test: -20, 27 J (only for especial require) TOLERANCES 1.OUTER DIA <40mm ±0.2mm FROM 40 TO 100mm ±0.3mm >100mm ±0.5mm 2.WALL THK <120mm OD±5% >120mmOD±7.5%