A. Improvement of casting characteristics B. Improvement of corrosion resistance C. One of the best known age and precipitation-hardening systems D. Improving machinability
A. 94% aluminium, 4% copper and 0.5% mn, mg, si and fe B. 92.5% aluminium and, 4% copper, 2% nickel and 1.5% mg C. 90% aluminium and 90% copper D. 90% magnesium and 9% aluminium with some copper
A. Gamma iron (910° to 1400°c), cu, ag, au, al, ni, pb, pt B. Mg, zn, ti, zr, br, cd C. A iron (below 910°c and between 1400 to 1539°c), w D. All of the above
