Abstract: A zinc cast alloy is disclosed which contains, by weight, 15-60% Al, 0.05-3% Cu, 0.5-7% Si, 0.01-0.8% Mn, optionally 0.005-0.12% P and/or Na, balance Zn and incidental impurities. The alloy has a high damping characteristic, concurrently with good intergranular corrosion resistance and high resistance to both room and elevated temperatures. To achieve values of more than 1.times.10.sup.-3 (internal friction of Q.sup.-1), 20 .mu.m (corrosion depth) or less, 10 kg/mm.sup.2 or more (0.2% yield strength) at room temperature, and 20 kg/mm.sup.2 or more at elevated temperature of 100.degree. C., the alloy has to be subjected to a solution-heat treatment in the range of 300.degree.-400.degree. C., followed by a rapid cooling, preferably a water quench.

Abstract: An iron-base alloy having high erosion resistance to molten zinc attack which essentially consists of (by weight):0.01 to 2% of carbon;0.01 to 2% of silicon;0.01 to 2% of manganese;totally 1 to 6% of at least one element selected from the group consisting of niobium and tantalum;totally 1 to 10% of at least one element selected from the group consisting of molybdenum and tungsten;10 to 30% of nickel;10 to 30% of cobalt;10 to 25% of chromium; anda balance which is iron and inevitable impurities.

Abstract: A forgeable nickel-base super alloy free from cobalt and comprising the following essential constituent elements in weight percentage:Carbon--0.04 to 0.25%;Chromium--10.0 to 25.0%;Tungsten--10.0 to 25.0%;Aluminum--0.1 to 1.0%;At least one element selected from the group consisting of 0.005 to 0.05% calcium, 0.001 to 0.02% magnesium and a 0.001 to 0.02% rare earth element--0.001 to 0.05%;andNickel and other inevitable impurities--balance;said forgeable nickel-base super alloy including a forgeable nickel-base super alloy added with, as required, the following additional elements in weight percentage in addition to the aforementioned essential elements:Zirconium--0.005 to 0.1%;and/orAt least one element selected from the group consisting of 0.1 to 3.0% niobium and 0.1 to 1.5% hafnium--0.1 to 3.0%.