... strength:600-850Mpa/mm2 enlongation:3%-6% Black painted steel stripsMaterials:Q195/Q215/Q235B/Q345B/20Mn steelTechnical Parameters ... )≥850-950,elongation:δ5≥5-8%Surface treatment: painted or painted& waxedColors:black,green,red,yellow,etcSpecifications:(ThicknessxWidth) BWG28X3 ... 0mm, 25.4mm, 32.0mm)Coils Inner Diameter:Ribbon wound=200mm/300mm/406mm;Oscillated wound=406mm Black painted steel strips