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2026

What Is Tungsten Carbide? Hardness, Density, Price & CNC Machining Applications

Author:

Benda

Discover what tungsten carbide is, its extreme hardness, and density. Learn why it doesn't tarnish

In heavy-duty manufacturing, high-speed cutting, and severe wear environments, standard steel and aluminum often fail to meet performance demands. When extreme durability is required, industrial engineers turn to one of the hardest materials known to man: tungsten carbide.

If you are sourcing high-wear components, choosing between tungsten vs tungsten carbide, or looking for specialized industrial parts like a tungsten carbide nozzle, understanding this material’s properties is critical.

What Is Tungsten Carbide?

To understand what is tungsten carbide, we must look at its chemical composition. Unlike pure tungsten metal, tungsten carbide (chemical formula: WC) is an inorganic chemical compound containing equal parts of tungsten and carbon atoms.In its most basic form, it is a fine gray powder. Through an advanced industrial process called powder metallurgy (sintering), this powder is pressed with a metallic binder—usually cobalt or nickel—at ultra-high temperatures to create incredibly dense, rigid, and solid industrial shapes. Products like tungsten carbide sanding disc, cutting inserts and spray nozzles all rely on this material for heavy‑duty service.

Tungsten vs Tungsten Carbide: What Is the Difference?

Comparison Item	Pure Tungsten	Tungsten Carbide
Material Nature	Pure elemental metal (W), single metal substance	Man-made alloy (Tungsten + Carbon + Cobalt binder), composite industrial material
Hardness	Low-moderate, relatively soft, easy to deform under friction	Extremely high (8.5–9 Mohs), superior wear resistance
Density	19.3 g/cm³ (Higher density, best for counterweights)	15.0–16.0 g/cm³ (High density but lighter than pure tungsten)
Melting Point	3422°C (Highest among all metals, excellent high-temperature resistance)	2870°C (High heat resistance, but lower than pure tungsten)
Tarnish & Corrosion Resistance	No tarnish, good oxidation resistance	Does not tarnish in normal environments; only slight oxidation for cobalt-bonded grades in harsh conditions
Machinability	Soft and ductile, easy for standard CNC turning & milling	Hard & brittle, requires professional grinding, EDM and precision CNC machining
Main Advantages	Ultra-high melting point, maximum density, stable high-temperature performance	Super hardness, long service life, anti-wear, high machining stability
Price Level	High raw material cost	Tungsten carbide price is cost-effective for industrial tools, stable market price
Core Applications	High-temperature furnace parts, electrodes, radiation shielding, precision counterweights	Tungsten carbide disc, tungsten carbide wheel, tungsten carbide sanding disc, tungsten carbide nozzle, CNC cutting tools, wear-resistant parts

Properties of Tungsten Carbide

Pure tungsten carbide appears as a grayish-black powder. Its Mohs hardness reaches 8-9 (second only to diamond's 10), and its melting point is as high as 2870°C, almost twice that of steel (approximately 1538°C). However, pure tungsten carbide also has a drawback: it is relatively brittle and easily fractures under impact. Therefore, the industry standard is "tungsten carbide alloy," usually with cobalt (Co) as a binder. This alloy retains over 90% of its hardness while significantly improving its toughness. WC-Co alloy is the most commonly used material in cutting tools. The addition of cobalt gives it excellent hardness and toughness, making it ideal for machining steel and hard materials.

Tungsten Carbide Hardness
Tungsten carbide hardness is its biggest advantage. It scores around 8.5–9 on the Mohs scale, much harder than steel, titanium and pure tungsten. This extreme hardness makes tungsten carbide disc, tungsten carbide wheel and tungsten carbide sanding disc ideal for grinding metal, stone and composite materials without quick wear‑out.

Tungsten Carbide Density
Tungsten carbide density is approximately 15–16 g/cm³, heavier than steel and titanium. Its high density brings stable weight balance and strong impact resistance, perfect for heavy‑load industrial tools and precision counterweight components.

Does Tungsten Carbide Tarnish?

Pure tungsten carbide itself is highly resistant to oxidation and corrosion. It will not rust, fade or tarnish under normal industrial conditions. Only cobalt‑bonded carbide may slightly oxidize in extreme humid or acidic environments, but surface treatment can easily solve this issue. For daily use and machining work, carbide remains long‑term stable and shiny.

Main Application Industries of Tungsten Carbide

CNC Machining & Metalworking Industry

This is the most common field. Tungsten carbide is made into cutting inserts, drill bits, milling cutters, turning tools, and customized wear‑resistant parts. Products like tungsten carbide disc, tungsten carbide wheel and tungsten carbide sanding disc are widely used for metal grinding, polishing and surface finishing in machining workshops.

Oil, Gas & Energy Industry
High‑pressure and wear‑resistant components such as tungsten carbide nozzle, valve cores, pump parts and sealing rings are applied in oil extraction, natural gas transmission and new‑energy equipment, thanks to its high density and corrosion resistance.

Mining & Construction Industry
Carbide‑tipped drill bits, crushing tools, wear plates and excavation components are used for rock drilling, mining, road construction and tunnel engineering, with long service life under heavy load.

Aerospace & Defense Industry
High‑precision tungsten carbide parts are used for aircraft engine components, weapon wear‑resistant parts, counterweights and anti‑abrasion structural parts, requiring strict tolerance and surface finish.

Automotive Industry
Carbide cutting tools for auto parts machining, wear‑resistant pins, bearings, valve components, and sanding wheels for automotive surface treatment.

Electronics & Semiconductor Industry
Ultra‑precision carbide nozzles, grinding discs and small wear‑resistant parts for chip processing, circuit board cutting and precision polishing.

Chemical & Marine Industry
Due to good corrosion resistance, tungsten carbide parts are used in chemical pumps, seawater treatment equipment and marine engineering components.

3C Hardware & Daily Tools
Tungsten carbide wheel, grinding discs and abrasive accessories for hardware polishing, jewelry processing and mold making.

FAQ

What is the tungsten carbide price?

The price varies by grade, cobalt content, precision and processing difficulty. High‑precision parts like tungsten carbide nozzle cost more than standard abrasive‑grade tungsten carbide disc or wheels. Bulk custom orders get better unit price.

How is tungsten carbide processed?

Due to its high hardness and brittleness, it cannot be machined by ordinary turning or milling. Main processing methods include diamond grinding, wire EDM, sinker EDM, laser machining and powder metallurgy sintering.

Is tungsten carbide brittle?

Yes. Tungsten carbide is hard but brittle. It resists friction well but may crack under strong heavy impact, so proper processing and usage are required.

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