chemical composition % ? of grade ? cu-phc ? ( cw020a ) cu including ag < 0.015% p cu pb bi others 0.001 - 0.006 min ? 99.95 max ? 0.005 max ? 0.0005 total 0.03 mechanical properties of grade ? cu-phc ? ( cw020a ) rm?- tensile strength (mpa) (r220) 220-260 rm?- tensile strength (mpa) (r290) 290-360 rm?- tensile strength (mpa) (r350) 350 rp0.2?0.2% proof strength (mpa) (r220) 140 rp0.2?0.2% proof strength (mpa) (r290) 250 rp0.2?0.2% proof strength (mpa) (r350) 320 a?- min. elongation at fracture (%) (r350) 5 a?- min. elongation lo = 50mm (%) (r220) 33 a?- min. elongation lo = 50mm (%) (r290) 4 a?- min. elongation lo = 100mm (%) (r350) 3 ? vickers hardness ?( hv): ? (h040) (r220) 40 - 65 ? vickers hardness ?( hv): ? (h090) (r290) 90 - 110 ? brinell hardness ? (hb): ? (h100) (r350) 100 properties cu-phc volume resistivity = 0.01724 - 0.01786 ω*mm2/m ; equivalent grades of grade ? cu-phc ? ( cw020a ) warning! only for reference eu? germany en din,wnr cu-phc 2.007 se-cu