STAINLESS STEEL

摘要

The entire family of stainless steels is divided into four major groups. The basic characteristics of each group and the AISI means of designation are summarized briefly in the paragraphs which follow. Austenitic grades. The austenitic grades carry identifying numbers of either 200 or 300. However, most of the steels are 300 series alloys, the chromium-nickel grades. The 200 series represents a more recent addition to the austenitic series, in which some of the nickel has been replaced by manganese. The austenitic grades are used more widely in corrosive environments, although some grades, most notably type 310, are used for elevated temperatures up to 650 deg C (1200 deg F).