Hardening. Heat to 800 “C (l-l75 “FL Carbonitriding and austempering
are suitable processes. Quench in water. brine. or aqueous polymers. Oil
quench rounds under A.7 mm (0. I9 in.) for full hardening. Responds well
to austempering (same procedure as for 1090).
In aerospace practice, parts are austenitized at 800 “C (1475 “F). and
quenched in oil or polymers