| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | REQUIRED CHEMICAL CONTENT COBALT 97.00 PCT MIN MAX IMPORITIES LIMITATIONS,CARBON 0.50 PCT,COPPER 0.10 PCT,IRON 0.30 PCT,NICKEL 0.75 PCT,PHOSPHORUS 0.02 PCT,SULPHUR 0.05 PCT,ALL MATERIAL SHALL PASS A SCREEN WITH 2 IN. SQ OPENINGS AND SHALL NOT PASS A US STD SIEVE NO. 20 |