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   API C1 Tungsten Carbide
Tungsten Carbide Grade Specifications

Material: H81
Hardness: 88 - 89.0 RA
Density: 14.05 - 14.25 GM / CC
Chemical Composition:
Co - 13.0%   Wc - 86.50%
Tac - 0.5%    
Remarks:  
GOOD WEAR RESISTANCE, MEDIUM SHOCK
Material: COBALT BINDER
Hardness: 88.0 - 89.5 RA
Density: 14.05 - 14.25 GM/CC
Chemical Composition:
Co - 12.5%   Wc - 87.0%
Tac - .5%    
TRS: 485,000 MIN
POROSITY (200X): A00 B00 C00
Remarks:  
GOOD WEAR RESISTANCE, MEDIUM SHOCK