Tungsten Carbide Ball Grade

Class	Grade	Chemical Composition				Physical-Mechanical Property			Performance characteristic	Orientation for Property Increasing
		WC	Co	Ni	Others	Density g/cm³	Hardness （HRA）	T.R.S. N/mm²
WC + Co	YG6	B a l a n c e	6			14.6-15.0	91	1600	The hardest and most wear resistant. Lower toughness than YG8. Used in ball valves that is high abrasion and high impact resistance.	↑ Abrasive Resistance Toughness ↓
	YG8	B a l a n c e	8			14.4-14.8	89	1800	Higher hardness and wear resistant. Better toughness than YG6. Have a well shock resistance, used in ball valves.
	YG6X	B a l a n c e	6		A Little	14.6-15.0	92	1450	Submicron carbide, higher hardness and wear resistance than YG6, lower toughness than YG8. Used in ball valves that is high abrasion and high impact resistance.
WC + Ni (Cr)	YN6	B a l a n c e		6	A Little	14.5-14.9	90	1450	Higher hardness and wear resistance and corrosion resistant. Used in ball valves where high temperature is required.	↑ Abrasive Resistance Toughness ↓
	YN8	B a l a n c e		8	A Little	14.4-14.8	88	1650	Higher hardness and wear resistance. Used in ball valves where shock resistance and corrosion are required.
	YN12	B a l a n c e		12	A Little	14.0-14.4	86	1800	Higher toughness for impact load .Use in ball valves where better shock and impact are required.