Such
alloys are formed by atoms with metallic radii that are within about 15
percent of each other Because of similar radii and other characteristics
of transition metals, alloys are readily formed by these metals The
alloys so formed are hard and have often high melting points The best
known are ferrous alloys: chromium, vanadium, tungsten, molybdenum
and manganese are used for the production of a variety of steels and
stainless steel