Cu is listed as a Balance element for this material, but its % value is not listed in the specification. The value shown is a calculated one.

Cast: 85,000-90,000 TS; 60,000-70,000 YS; 4-12 El; 9 RA; 200-220 HB; For gears, shafting welding dies and welding electrodes; corrosion resistant, age hardening.