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tungsten: 7.5: 3430–4600: 2000–4000: 1960–2450 75: Re: rhenium: 7.0: 1350-7850: ... Mohs scale of mineral hardness; Mohs hardness of materials (data page ...
Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering [7] for use in industrial machinery, engineering facilities, [8] molding blocks, [9] cutting tools, chisels, abrasives, armor ...
Mohs hardness kit, containing one specimen of each mineral on the ten-point hardness scale The Mohs scale ( / m oʊ z / MOHZ ) of mineral hardness is a qualitative ordinal scale , from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material.
A superhard material is a material with a hardness value exceeding 40 gigapascals ... Tungsten carbide is an industrially-relevant ... from 0 to 10 on the Mohs ...
Sometimes manufacturers or retailers refer to tungsten carbide as a metal, but it is a ceramic. [79] Because of tungsten carbide's hardness, rings made of this material are extremely abrasion resistant, and will hold a burnished finish longer than rings made of metallic tungsten.
The coefficient of thermal expansion of cemented tungsten carbide is found to vary with the amount of cobalt used as a metal binder. For 5.9% cobalt samples, a coefficient of 4.4 μm/m·K was measured, whereas 13% cobalt samples have a coefficient of around 5.0 μm/m·K.
Mohs hardness: 7.5 : Vickers hardness: 3430–4600 MPa : Brinell hardness: 2000–4000 MPa : CAS Number: 7440-33-7 : History; Discovery and first isolation: Juan José Elhuyar and Fausto Elhuyar [12] (1783) Named by: Torbern Bergman (1781) Symbol "W": from Wolfram, originally from Middle High German wolf-rahm 'wolf's foam' describing the ...
increases hardness, tensile strength, and toughness. increases resistance to corrosion, heat, and wear. more than 11% makes it "stainless", by causing an oxide coating to form. [61] carbide inclusions reduce wear, but bulk material is softer. Cobalt (Co) increases strength and hardness, and permits quenching in higher temperatures.
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