《Carbon_and_Alloy_Steels_Introduction》.pdf

Carbon Alloy Steels Introduction Designation System Much study and effort have been put into providing a simplified list of Table 1 Types and Approximate Percentages of steel compositions to serve the metallurgical and engineering requirements Identifying Elements in Standard Carbon and Alloy of fabricators and users of steel products. These studies have resulted in the Steels carbon and alloy steel compositions listed in Tables 2 to IO and are generally known as the Standard Grades. Series designation Description AISI-SAE Grades Carbon steels With few exceptions. steel compositions established by the American IOXX Nonresulhrize~. I .oO manganese maximum iron and Steel Institute and the Society of Automotive Engineers (AISI and IIXX RlWlfWiZ~d SAE) use a four-numeral series to designate the standard carbon and alloy IZXX Rephosphorized and resulfurized steels. specified to chemical composition ranges. In two instances of alloy ISXX Nonresulfurized. over I .OOmanganese mwmum steels. a five-numeral designation is used.