sulphur, lead, phosphorous

silicon, aluminium, titanium

vanadium, aluminium

chromium, nickel

0.02%

0.30%

0.63%

0.80%

aluminium, copper etc.

nickel, molybdenum etc.

nickel, copper, etc.

all of the above

nickel, copper

nickel, molybdenum

zinc, tin, lead

nickel, lead and tin

silver and some impurities

refined silver

nickel, copper and zinc

nickel and copper