GAS NITRIDING AND HEAT TREATMENT OF LOW-ALLOY STEEL PARTS
AMS2759/6
This document specifies the procedure and requirements for heat treating Nitralloy 135M, Nitralloy EZ, Nitralloy N, 4140, 4340, and H11 steels and for the subsequent gas nitriding of these alloys by the use of raw or dissociated ammonia.