... ,1/8,5/32,3/16,7/32,1/4,5/16 copper plated steel ... G16 G100 G1000 AISI52100 chrome steel 1/16,3/32,1/8,5/32,3/16,7/32,1/4,5/16 ... -10852. Grade:G100 to G10003. Size: 1/8" 5/32" 3/16" 5/16" 5/32" 7/32" 1/4 ... " 3/8" -7/8" 1/2" 1"4. Hardness: 58-62HRC5. ... .500.10~0.300.60~0.900.04Max0.05MaxAISI 10850.83~0.880.10~0.300.30~0.700.04Max0.04Max ...