We are an approved for provider for processing in accordance with BAC 5619 and BAC 5617 in the temperature range of 550-1150 degrees F (see D14426). BAC 5619 capabilities include Precipitation Hardening of 15-5 and 17-4 PH to all  hardness ranges and Stress Relieving. BAC 5617 capabilities is strictly Stress Relieving of alloy steels.