1- chemical composition ( wt % ) ------------------------------ element c si mn p s ni cr cn ------- -- -- -- - - -- -- -- Min. 0.62 0.2 0.45 0 0 0 12.5 0 Max. 0.72 0.5 0.80 0.02 0.025 0.5 13.7 0.1 2- Mechanical properties ------------------------ ultimate tensile strengh Hardness vickers ------- -------- 1070 ± 100 Mpa 230 - 330 hv 1kg at dual time 15 sec 3- Strip dimensions -------------------- 22.40 mm +0.025 mm width 16.97 mm +0.025 mm 14.00 mm +0.025 mm Thickness 0.1 mm +0.007 mm Maximum naverse variation of thickness <0.005 mm 4- coil size ------------- the net weight of each coil shall be with in the following ranges : size 0.1 mm x 22.40 mm 17-24 kg size 0.1 mm x 16.97 mm 14-17 kg size 0.1 mm x 14.00 mm 12-14 kg