... thicknesssurface:2B BA 6K 8K HLapplication range: High-strength parts, spring building structure, bus, car wheels, cover platerstensil strength:1100 to ... 2000 N/mm2Tempered spring steel stripMaterial grade: c50,c55,c60,c67,c70,c75 Thickness ... : 0.15mm to 2.5mm Width: 8mm-300mm Surface: blue,yellow, ...