Other standards detail the property and testing. requirements for gray and white iron castings, cast. iron pipe and fittings, and ductile iron castings. This volume also includes standards on. radiographic examination of castings to be used. with ASTMâs standard reference radiographs.
The free enterprise system in the United States developed soon  after the country gained its independence. This is a system that  allows people or entities to establish theiâ¦r own company, taking a  competitive stance with other businesses, and operate it for their  own profit.
A Mixed Economy-The Us System. The economic system of the United States is principally one of private ownership. This system, often referred to as a free enterprise system, can be contrasted with a socialist economic system, which depends heavily on government planning and public ownership of the means of production. Yet government has to some extent always been involved in regulating and guiding the U.S. economy.