HRA89 Tungsten Carbide Shield Cutter Tungsten Carbide Cutting Tips

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Hunan Boyun-Dongfang Powder Metallurgy Co., Ltd

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Cemented carbide for construction engineering tools J21 type

Grade Introduction of Mineral
Grade	Co	Grain Size of WC	Hardness		Density	Flexural Strength	Bending Tough- ness	Elastic Modulus	Coeffi- cient of Thermal Expan- sion	Application
	Co%		HRA	HV₃₀	g/cm³	MPa	N/mm²	GPa	10^-6/°C
G206	6	Medium	90.8	1500	14.9	3200		530	4.9	Suitable for DTH drilling with high wind pressure
G506	6	Coarse	88.0	1200	14.9	2500		530	4.9	Suitable for gear shaper cutting of concrete and asphalt road
G208	8	Medium	89.1	1300	14.7	2750		510	5.1	Suitable for DTH drilling with medium and low wind pressure,and rock breaking
G308	8	Medium	88.8	1270	14.7	2750		510	5.1	Suitable for tri-cone drill bit in milling, and tri-cone
G211	11	Medium	88.0	1200	14.4	2800		478	5.6	tri-cone drill bit in milling, drill bit in engineering
G215	15	Medium	86.8	1100	14	2800		430	6.3	Suitable for oilfield composite sheet
G510	10	Coarse	86.2	1040	14.5	2700		490	5.4	Suitable for rotary drilling cutter, and coal cutters
G512	12	Coarse	86.0	1030	14.3	2900		470	5.7	Suitable for tunnel boring machine of scraper,cut- ter and wear plate
G513	13	Coarse	85.6	1000	14.2	2900		460	5.8	Suitable for tunnel boring machine of scraper,cut- ter and wear plate
G707	7	Extra Coarse	86.3	1050	14.8	2200		520	5	Suitable for hard rock in engineering, and DTH drilling cutter
G806	6	Extra Coarse	86.2	1040	14.9	2100		530	4.9	Suitable for high rock of rotary drilling cutter

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