| Details  | 
              Description | 
              Can Do  | 
            
            
              
                | Class 1                   | 
                As plated, no subsequent heat treatment: A bake for hydrogen embrittlement relief is not considered a heat treatment. | 
                Yes | 
              
              
              
                | Class 2                   | 
                Heat treated to obtain required hardness: Ma be used on all metals not affected by heating to 500F and above. | 
                Yes | 
              
              
              
                | Class 3                   | 
                Aluminum alloys non-heat treatable, and beryllium alloys processed to improve adhesion of the deposit. | 
                Yes | 
              
              
              
                | Class 4                   | 
                Aluminum alloys, heat-treatable, processed to improve adhesion of the nickel deposit. | 
                Yes | 
              
              
              
                | Grade A                   | 
                0.0010 inch minimum thickness | 
                Yes | 
              
              
              
                | Grade B                   | 
                0.0005 inch minimum thickness | 
                Yes | 
              
              
              
                | Grade C                   | 
                0.0015 inch minimum thickness | 
                Yes |