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Alloys of Steel

Steel is successfully alloyed with other metals, improving its qualities for some purposes. 어ὸ part of silver adds immensely to the hardness of steel, and yet increases its tenacity. To part of platinum, though not forming so hard an alloy as the silver and steel, gives a very great degree of toughness. Rhodium, palladium, iridium, remains ductile. Especially recommended is metal is rendered hard and more brilliant , but the alloy consisting of 97 per cent. of alum- 3 per cent of zinc. The alloy with not take a very fine polish, and cannot be 7 per cent. of tin can be worked well, but does cast, since a more fusible alloy with a large proportion of tin is separated. Aluminum and lead do not unite. The composition with 3 per cent. of silver and 97 of aluminum posa beautiful color, and in equal parts they yield an alloy of the hardness of bronze.

The union of 99 per cent. of aluminum and 1 and osmium make steel very hard, but their of gold is, though hard, still ductile; its color use, from their cost, is confined mainly to the experimental laboratory. Platinum, in its malleable state, may be cut with a knife; but with steel it forms an alloy not to be touched with a file.