Electric-resistance-welded Carbon Steel Tube (ERW

ERW tube welded steel tube welded pipe Used the high precisionwelded line bench to product tubes, with complete checking equipments. Consistent with ASTM A513/EN10305, used quality raw materials and reasonable production process. Advantages: high precision size, high consistency, excellent mechanical properties. Widely used in follow industries: furniture, mechanical structure,bicycle, fitness equipment and so on. Chemical composition(%) of welded tube’s common grades Standard Grade Chemical Composition(%)C Si Mn S P Cr GB700 Q/BQB402-2003 Q195 0.06 0.12 ≤0.30 0.25 0.50 ≤0.050 ≤0.045 Q215 0.09 0.15 ≤0.30 0.25 0.55 ≤0.050 ≤0.045 Q235A 0.14 0.22 ≤0.30 0.35 0.65 ≤0.050 ≤0.045 SPCC ≤0.12 ≤0.05 ≤0.50 ≤0.025 ≤0.035 Conventional mechanical properties of welded tube Standard Grade Soft conditions Low-hand conditions Tensile stengthσb(MPa) Make percentage elongationδ5(%) Tensile stengthσb(MPa) Make percentage elongation δ5(%) GB/T13793-1992 Q/BQB402-2003 Q195 ≥315 ≥22 ≥335 ≥14 Q215 ≥335 ≥22 ≥355 ≥13 Q235A ≥375 ≥20 ≥390 ≥9 SPCC ≥270 ≥36 - -