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Show Alamlnum and Iron Alloy-Ten Alloy-Ten per cent, of aluminum odded to tho weak metal copper gives it the strength of steel. Ono stove making concern in Michigan uses about one-tenth of 1 per cent, of tho metal in all its Iron castings, with the result of diminishing the shrinkage, shrink-age, making it fill tho mold better, Improving Im-proving the skin, rendering the grain perfectly even and preventing chilling, oven turning white iron into gray. The addition of silicon to cast Iron has been shown to turn white iron into gray also Tho experiments with aluminum show '- -uocessive remeiwng toe aluminum becomes deposited and tho al loy loses its strength, it does so loss than iron of the samo kind without alumnia subjected to the same number of remelt-ings remelt-ings under the same conditions. The iron and aluminum alloy can be very readily turnod in the lathe, tho grain being be-ing fine and even. Tho elasticity of the iron is increased. St. Louis Republic. |