Sand casting greater cost. With a completed mold at the appropriate moisture content, the box containing the sand mold is then positioned for filling with molten metal—typically iron, steel, bronze, brass, aluminium, magnesium alloys, or various pot metal alloys, which often include lead, tin, and zinc. After being filled with liquid metal the box is set aside until the metal is sufficiently cool to be strong. The sand is then removed, revealing a rough casting that, in the case of iron or steel, may still be glowing red. In the case of metals that are significantly heavier than the casting sand, such
American Brass Company Inc., the next largest brass manufacturer, was able to expand its market share significantly as American Brass lagged. Despite its managerial challengers, American Brass was still a highly innovative company. It developed and patented a process for constructing hollow and ventilated busses from rectangular copper bars. The company also developed numerous new and unique metallurgical processes and alloys. On January 1, 1912, the companies held by American Brass were dissolved and all of the firm's divisions began operating under the name of the American Brass Company. The company also expanded, taking over the Chicago Brass Company of Kenosha, Wisconsin; Waterbury