Characteristics of Tungsten Carbide Cutter

There are two grades of cemented carbide, tungsten carbide and tungsten steel.

One is pure carbide and anti hole types. Pure carbide contains carbides and cobalt only, with best strength and anti-wear characteristics, and its strength and abrasion resistance will be reduced by adding any other substances, it is usually used for cutting cast iron and non-ferrous metal materials. But the pure carbide cannot endure high temperature, its scrap will stick on the cutter blade face easily during high heat, which causes the flank depression by its diffusion. Carbide added tantalum carbide and titanium carbide is with high temperature resistance because these two ingredients are with higher melting point than tungsten carbide, relatively its strength and anti-ear characteristics are lower than pure carbide.

tungsten steel material properties:

ISO classification	Grade	Usage	Rockwell Hardness	Bending Force	Ingredients
			HRA	(kg/mm2)	W	Co	Ti	Ta	C
P	P01	toughness↓big big↑wear	91.5↑	70↑	30-78	4-8	10-40	0-25	7-3
	P10		91↑	90↑	50-80	4-9	8-20	0-20	7-10
	P20		90↑	110↑	60-83	5-10	5-15	0-15	6-9
	P30		89↑	130↑	70-84	6-12	3-12	0-12	6-8
	P40		88↑	150↑	65-85	7-15	2-10	0-10	6-8
	P50		87↑	170↑	60-83	9-20	2-8	0-8	5-7
M	M10	toughness↓big big↑wear	91↑	100↑	70-86	4-9	3-11	0-11	6-8
	M20		90↑	110↑	70-86	5-11	2-10	0-10	5-8
	M30		89↑	130↑	70-86	6-13	2-9	0-9	5-8
	M40		87↑	160↑	65-85	8-20	1-7	0-7	5-7
K	K01	toughness↓big big↑wear	91.5↑	100↑	83-91	3-6	0-2	0-3	5-7
	K10		90.5↑	120↑	84-90	4-7	0-1	0-2	5-6
	K20		89↑	140↑	83-89	5-8	0-1	0-2	5-6
	K30		88↑	150↑	81-88	6-11	0-1	0-2	5-6
	K40		87↑	160↑	79-87	7-16	--	--	5-6

tungsten steel tool suitability:

ISO classification	Grade	Work Material	Cutting Type	Working Conditions
P	P01	cast steel, steel	Precise turning, precise boring	Apply to cutting high-speed steel and small feed, or require the dimensional accuracy and good surface of the work piece, and work under no vibration state of processing.
	P10	cast steel, steel	turning, by die cutting, thread cutting	High ~ middle speed cutting, Small ~ middle milling area, middle feed or under good processing
	P20	cast steel, steel、malleable iron (Long chip)	Turning, by the die cutting, milling, planning cutting	Middle speed cutting, middle feed power, the most popular one among P series.   Planning feed should be small, with good machining conditions.
	P30	cast steel, steel、malleable iron (Long chip)	turning, milling, planning	Low ~ medium-speed cutting, medium ~ high amount of feed, or the surface hardness of work piece with uneven hardness, changes of feeding, and vibration conditions .
	P40	Steel, cast iron with sand hole	turning, planning	low-speed cutting, large amount of feed, and under the worst processing conditions
	P50	low to middle tensile strength steel	turning, planning	low-speed cutting, large amount of feed, and under the worst processing conditions
		cast iron with sand hole	turning, planning	low-speed cutting, large amount of feed, and under worse processing conditions than P40
M	M10	steel, cast steel, cast iron	turning	medium to high-speed cutting, small to medium amount of feed, or under the better processing conditions, for cutting steel and cast iron materials.
		High manganese steel, Eos Tiantie Gang, special cast iron	turning	Medium to high-speed cutting, small to medium amount of feed, or under the better conditions.
	M20	steel, cast steel, cast iron	turning, planning	Middle speed milling, medium feed, or under bad processing conditions, for cutting steel and cast iron materials.
		Eos Tiantie Gang, special cast iron, high manganese steel	turning, planning	Medium speed milling, middle feed,, or cut under a good processing conditions.
	M30	steel, cast steel, cast iron, Oswald Tiantie Gang, special cast iron, heat-resistant steel	turning, milling, breaking	Medium speed milling, middle to large amount of feed, or thick rough material and material with sand holes, welding materials, under worse processing conditions than M20.
	M40	cutting steel, non-ferrous metal	turning, breaking	High speed cutting, middle to large amount of feed, complex shape of the cutting edge, it’s the M Series most needed toughness cutting processing conditions.
K	K01	cast iron	precision turning, precision honing, fine milling	High speed cutting, small amount of feed, under good cutting conditions without vibration.
	K10	chilled cast iron, hard cast iron, hardened steel	turning	very low speed cutting, small amount of feed, under good cutting conditions without vibration.
		High silicon aluminum alloy, ceramics, asbestos, cardboard, graphite,		Cutting under good cutting conditions without vibration.
		cast iron above HB200, malleable iron (long cutting)	turning, milling, honing cutting, broaching, reaming	Middle speed cutting, small amount of feed, widely used for K series, or under vibration-free machining conditions.
		chilled steel	turning	low-speed cutting, small amount of feed or under cutting conditions of smaller vibration.
		silicon-aluminum alloy, hard copper alloy, hard rubber, glass, porcelain, plastics		under cutting conditions of smaller vibration.
	K20	Cast iron belowHB220	turning, milling, planning, reaming, drilling	Middle speed cutting, medium to large amount of feed, used for general machining or request of the powerful the wayward processing conditions
		Non ferrous metal materials		Request under powerful the wayward processing conditions
	K30	low tensile strength steel, low hardness cast iron	turning, milling, planning	low speed cutting, small amount of feed, under better processing conditions.
	K40	non-ferrous metal of low hardness materials, wood	turning, milling, planning	cutting under the conditions worse than K30

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Reference Information Source: tool designed Huang Rongwen

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