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GradeST45.8, ST 52.3 BK+SMetric sizeO.D: 30 to 700mm, Max length 12m.Straightness: 0.5 -1.0/1000Tolerance EXT: DIN 2391Tolerance INT: ISO H8Roughness(Ra): 0.2 to 0.4µType: cold drawing, cold rolling, honedCHEMICAL COMPOSITION (%)SiMnCP (Max.)S(Max)0.50Max<=1.60.22Max0.0250.025MECHANICAL PROPERTIESTensile strength MinYield Point MinElongation % MinDELIVERY CONDITION580N/mm2420N/mm210STRESS RELIEVED BKSMarking: JW, material grade, specificationLength: 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)TOLERANCES1.OUTER DIA <40mm ±0.2mmFROM 40 TO 100mm ±0.3mm>100mm ±0.5mm2.WALL THK <120mm OD±5%>120mmOD±7.5%