1.  iron

2.  copper

3.  aluminum

1.  delta metal

2.  monel metal

3.  constantan

1.  improvement of casting characteristics

2.  improvement of corrosion resistance

3.  one of the best known age and precipitation-hardening systems

2.  improvement of corrosion resistance

3.  one of the best known age and precipitation-hardening systems

4.  improving machinability

1.  copper and tin

2.  copper and zinc

3.  copper and iron

1.  63 to 67% nickel and 30% copper

2.  88% copper and 10% tin and rest zinc

4.  silver and chromium

1.  1% silver

2.  2.5% silver

4.  10% silver

1.  magnesium alloys

3.  chromium alloys

4.  magnetic steel alloys

1.  94% aluminum, 4% copper and 0.5% Mn, Mg, Si and Fe

2.  92.5% aluminum and, 4% copper, 2% nickel and 1.5% Mg

3.  10% aluminum and 90% copper

1.  mild steel

2.  German silver

3.  lead