This SAE Aerospace Standard (AS) is to be used as a supplement to AS7109. In addition to the requirements contained in AS7109@ the requirements contained herein shall apply to suppliers seeking Nadcap Coatings accreditation who are engaged in cementation. Class Qualification shall include one of the following: Class A Pack Process-In Pack Class B Above Pack Class C Chemical Vapor Deposition (CVD)/Diffusion Class D Slurry Process a. Dip b. Spray