AISI Bar Machinability Database of Steels Using Sintered Carbide Tools in Single Point Turning
The AISI Bar Machinability Sub-committee was formed in 1991 to develop a database of automotive bar steel machinability under single point carbide turning conditions. To accomplish this task more than 30 industrially significant steel grades and their variants have been evaluated in the ensuing years. The test materials were produced by eight different steel companies using various melting and casting practices. Material properties and microstructures were characterized and the machinability of each steel variant was evaluated by at least two different machinability testing laboratories. This paper presents the results of these tests and correlates the machinability of the steels with their properties. The data base thus generated can be used by the machining industry to compare the relative machinability of various steel grades and their properties to make more informed materials application decisions.