Appearance: Dark powder.  Application: For producing cemented carbide, etc. Product specification: Grade CTC-2 CTC-3 Fssss (µm) 2-5 2-5 Combined Carbon(%) 9.7-10.3 12.3-12.7 Combined Carbon(%) e95 e120 No more than(%) O 0.25 / N 0.4 / Fe 0.05 0.05 Co 0.05 0.08 Mo 0.05 0.05 K, Na 0.05 0.01 S 0.02 0.02 Si 0.005 0.005 Ca 0.01 0.01 Cf 0.5 0.05