Tungsten Disulfide Powder (WS2 Powder)

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Tungsten disulfide powder, also known as WS2 powder, is a high-performance dry solid lubricant used to reduce friction, support high-load sliding surfaces and improve lubricity in demanding operating environments. Tungsten Disulfide is widely evaluated for aerospace, vacuum, automotive, racing, tooling, precision engineering and industrial lubrication applications where conventional oils or greases may be limited.

Lowerfriction supplies tungsten disulfide powder for technical buyers, engineers, researchers and procurement teams evaluating dry film coatings, oil/grease additive systems and specialized solid lubricant materials. Use the product options on this page to buy Tungsten Disulfide online where available, or contact Lowerfriction for bulk supply, custom particle size or application-specific recommendations.

Engineer / Procurement Summary: WS2 powder is a dry solid lubricant material with formula WS2 and CAS No. 12138-09-09. It is known for approx. 0.03 dynamic coefficient of friction, coated-film load-bearing ability up to approx. 300,000 psi, sub-micron particle size options and suitability for dry film coatings, vacuum lubrication, high-load surfaces and lubricant additive testing. Confirm purity, SKU, packaging and documents against the latest product listing, brochure and SDS before purchase.

Quick Product Data

Common names	WS2 powder, tungsten disulfide powder, tungsten disulphide powder, tungsten sulfide powder
Chemical formula	WS2
CAS No.	12138-09-09
Material type	Dry solid lubricant powder / inorganic lamellar solid lubricant
Typical coefficient of friction	Approx. 0.03 dynamic and 0.07 static, subject to test method and operating conditions
Reference load-bearing ability	Up to approx. 300,000 psi as a coated film, application-dependent
Typical dry film thickness	Approx. 0.5 micron, depending on application process
Common sub-micron particle size range	Approx. 0.4 to 1.0 micron; nano options may be available
Primary use	Dry film lubrication, oil/grease additive use, vacuum lubrication, high-load friction reduction, tooling and precision engineering
Brand	Lowerfriction Lubricants / MKnano
Purity / SKU note	Confirm against selected product SKU, SDS and latest product document before publishing

Available WS2 Powder Particle Sizes and Grades

Grade / Product Direction	Particle Size Direction	Suggested Use	Availability / Product Note
Sub-micron WS2 powder	Approx. 0.4 to 1.0 micron	Dry film coatings, precision interfaces, bearings, sliding components and additive blending	Available as standard product
Nano WS2 powder	Nano-grade option, availability-dependent	Research, fine dispersion, thin films and specialized coating systems	Confirm availability before purchase; request-based if not actively listed
Custom / bulk grade	Application-specific	Industrial procurement, recurring supply and non-standard technical requirements	Request custom particle size or bulk quotation

Which WS2 Powder Grade Should I Choose?

Application Need	Suggested WS2 Direction	Buyer Guidance
Lowest-friction dry film coating	Sub-micron WS2 powder	Use where a very thin dry film is required on compatible metal or solid surfaces.
Vacuum or aerospace-related lubrication	Sub-micron WS2 dry film coating	Useful where oils and greases may migrate, evaporate or become unsuitable.
Grease or oil additive blending	Sub-micron WS2 powder	Validate dispersion, carrier compatibility and required wt% before production use.
Racing / high-load mechanical friction reduction	Application-specific WS2 grade	Confirm substrate, temperature, load and lubrication method before selecting grade.
Research or advanced material testing	Nano WS2 or custom grade	Confirm nano SKU availability; request-based if not actively listed.

Need help choosing a WS2 grade? Share your substrate, environment, operating temperature, load, carrier medium and target quantity with us. Contact Lowerfriction for technical guidance or a bulk quotation.

Standard Packing Options

Packing Size	Typical Buyer Use
1 lb	Small technical order / evaluation quantity
10 lb	Industrial order / production testing
55 lb / 25 kg	Bulk order / recurring industrial use
Custom / bulk	Procurement-specific requirement — available on request, subject to confirmation

Technical Specifications of Tungsten Disulfide Powder

Note: Values shown are typical reference values. Performance depends on particle size, grade, substrate, surface preparation, coating method, load, temperature, humidity, vacuum conditions and application environment.

Specification	Value / Reference Direction
Material	Tungsten Disulfide (WS2)
CAS Number	12138-09-09
Coefficient of friction — dynamic	Approx. 0.03
Coefficient of friction — static	Approx. 0.07
Load-bearing ability — coated film	Up to approx. 300,000 psi
Temperature range — air / normal atmosphere	Approx. -450°F (-270°C) to 1200°F (650°C)
Temperature range — vacuum	Approx. -305°F (-188°C) to 2400°F (1316°C)
Typical coating film thickness	Approx. 0.5 micron
Common sub-micron particle sizes	Approx. 0.4 to 1.0 micron

Application Methods of WS2 Powder

WS2 powder can be used as either a dry film coating material or as an additive in lubricants and compatible mixtures.

1. Additive Blending in Oil, Grease or Synthetic Lubricants

Typical blending ranges are application-specific and should be validated through testing before production use.
WS2 may help improve lubricity under boundary or extreme-pressure conditions when dispersion and carrier compatibility are suitable.
Particle size, mixing method, lubricant viscosity, filtration and operating environment should be considered before use.

2. Dry Film Coating by Spray, Buffing or Tumbling

Spray application may be performed using clean, dry pneumatic air under controlled conditions.
Typical reference dry film thickness is approx. 0.5 micron, depending on method and surface preparation.
Alternate methods may include forming a paste with a compatible carrier and buffing onto the substrate.
Common substrate categories include compatible metals such as steel, aluminum and copper, plus selected solids or plastics depending on application testing.

Application Clusters

WS2 Powder for Vacuum Lubrication

Tungsten disulfide powder is commonly selected for vacuum-related lubrication because it can support low-friction dry film performance where conventional oils and greases may not be practical. WS2 is relevant for bearings, actuators, sliding interfaces, fasteners and precision mechanisms used in low-pressure or controlled environments.

Suitable for dry film lubrication where liquid lubricants can migrate or fail.
Relevant for aerospace, laboratory, semiconductor and precision mechanism applications.
Application testing is recommended to confirm substrate compatibility, film quality and wear performance.

WS2 Powder for Dry Film Coating

WS2 powder can be applied as a thin dry film coating by spray, buffing or tumbling methods. A typical reference film thickness is approx. 0.5 micron, depending on surface preparation and process control.

Useful where a thin, low-friction coating is required without a wet lubricant layer.
Commonly considered for steel, aluminum, copper and other compatible metal surfaces.
Surface cleaning and controlled application conditions strongly affect final performance.

WS2 Powder as an Oil or Grease Additive

WS2 powder can be blended into oils, greases or synthetic lubricants to support boundary lubrication and friction reduction. Typical blending levels are often application-specific and should be validated by the user.

Suitable for engineers testing additive systems under load or high-temperature conditions.
Dispersion quality, carrier viscosity and particle size selection should be validated.
Avoid unsupported dosage claims unless confirmed by product testing or client guidance.

WS2 Powder for Automotive and Racing Components

In automotive and racing applications, WS2 is considered for pistons, rings, valve train components, cam/tappet interfaces, gears and selected wear points where lower friction and high-load performance are priorities.

Relevant for components exposed to heat, pressure and repeated sliding contact.
May be used through additive blending or selective dry film coating.
Results vary by engine design, lubricant system, coating process and operating conditions.

WS2 Powder for Tooling, Dies and Metal Forming

Tungsten disulfide powder can help reduce friction, galling and sticking in tooling, die, punch, mold release and metal-forming environments when selected and applied correctly.

Useful where dry film lubricity and high-load support are required.
Can support smoother release and reduced sliding friction on compatible surfaces.
Production trials should be performed before full-scale use.

WS2 Powder for Precision Engineering

For precision engineering, WS2 powder is relevant for linear bearings, precision gears, miniature mechanical assemblies, moving interfaces and components that require smooth motion with limited lubricant residue.

Supports very low-friction movement in compatible assemblies.
Can be useful where conventional wet lubricants attract contamination or are difficult to reapply.
Grade selection should consider surface finish, tolerance and operating environment.

Typical Industries and Use Cases

Industry / Segment	Common Components	Why WS2 is Used	Typical Application Method
Aerospace / Vacuum	Bearings, actuators, sliding interfaces, fasteners	Maintains lubricity in vacuum; supports high load and temperature extremes	Dry film coating
Automotive / Racing	Pistons, rings, valve components, cam/tappet interfaces, gears	Reduces friction and wear under high load/high heat	Additive blending; selective dry film
Precision Engineering	Linear bearings, precision gears, moving assemblies	Ultra-low friction for smoother motion and reduced wear	Dry film coating
Tooling / Metal Forming	Cutting tools, punches, dies, mold release	Lower friction; helps reduce galling and improves release	Dry coating / buffing
Industrial Machinery	Chains, slides, rollers, conveyors	Helps extend component life where relubrication is difficult	Additive in grease/oil; dry film on wear points

WS2 vs MoS2 vs hBN vs PTFE vs Graphite

Material	Best-Fit Use Direction	Key Difference / Selection Note
WS2 powder	Ultra-low-friction dry film coating, vacuum lubrication, high-load precision applications	Often selected when the lowest coefficient of friction and very high load-bearing coated-film performance are priorities.
MoS2 powder	High-load dry lubrication, oil/grease additives, coatings, polymers and vacuum-related applications	A proven solid lubricant and useful comparison product for broad extreme-pressure lubrication requirements.
hBN powder	High-temperature, release-agent and electrically insulating applications	Often considered when boron nitride properties are preferred over metal sulfide lubricants.
PTFE powder	Low-friction polymer additive, coatings and non-stick applications	Useful when polymer compatibility and non-stick properties are more important than metal sulfide dry-film behavior.
Graphite powder	General dry lubrication where environmental moisture is present	Common dry lubricant, but behavior can differ in vacuum or very low-moisture environments.

WS2 vs MoS2 — Performance Comparison

Property	Tungsten Disulfide (WS2)	Molybdenum Disulfide (MoS2)
Primary benefit	Ultra-low friction, very high load-bearing coated-film performance and strong high-temperature/vacuum suitability	Proven solid lubricant widely used for extreme-pressure lubrication and additive applications
Coefficient of friction	Approx. 0.03 dynamic and 0.07 static	Often higher than WS2 depending on film/test conditions
Load-bearing ability	Up to approx. 300,000 psi as coated film	Up to approx. 250,000 psi reference value
High-temperature performance	Reference range up to approx. 650°C in air and 1316°C in vacuum	Strong high-temperature performance; varies by environment and coating system
Vacuum suitability	Excellent; commonly considered for vacuum-related applications	Excellent in inert/high-vacuum environments
Takeaway	Often preferred when lowest friction and maximum coated-film load-bearing are key	Often selected for broad EP solid lubrication and additive use cases

Product Documents

Download Tungsten Disulfide Powder Product Brochure | Download Tungsten Disulfide Powder SDS

Safety, Handling and Storage Snapshot

Safety Disclaimer: This summary is provided for quick product evaluation only. Always review the latest Safety Data Sheet before handling, storage, transport or workplace use.

Safety Area	Recommended Page Wording
Dust / inhalation	Dust may cause respiratory irritation. Use appropriate ventilation and respiratory protection where dust is present.
Skin / eye contact	May cause skin and eye irritation. Use gloves and safety glasses or other workplace-appropriate PPE.
Ventilation	Use adequate ventilation or local exhaust where dust may be generated.
Storage	Keep container tightly closed in a dry, well-ventilated location.
Shipping / hazard wording	Avoid broad standalone non-hazardous claims. Qualify shipping wording with the latest SDS and transport classification.
Appearance note	Color/appearance can vary by grade and source document. Confirm final published wording against the latest SDS and product brochure.

Frequently Asked Questions

What is tungsten disulfide powder?

Tungsten disulfide powder, also called WS2 powder, is an inorganic dry solid lubricant used to reduce friction and wear. It is known for ultra-low friction, high load-bearing coated-film performance and suitability for demanding temperature or vacuum-related applications.

What is WS2 powder used for?

WS2 powder is used for dry film coatings, oil and grease additive blending, vacuum lubrication, aerospace components, automotive and racing parts, precision engineering, tooling, metal forming and industrial machinery wear points.

Can I buy Tungsten Disulfide online from Lowerfriction?

Yes. Technical buyers can use the product options on this page where available or contact Lowerfriction for bulk, custom particle size or procurement-specific tungsten disulfide powder requirements.

Do you supply WS2 powder in the USA, Canada and international markets?

For USA, Canada and international supply requirements, contact Lowerfriction with your target quantity, particle size, application, delivery location and required documents so the team can confirm availability and procurement options.

Why choose WS2 over MoS2?

WS2 is often selected when ultra-low friction and very high load-bearing coated-film performance are priorities, especially in high-temperature or vacuum-related conditions. MoS2 remains a proven choice for broad extreme-pressure solid lubrication and additive applications.

What particle size of WS2 powder should I choose?

Sub-micron WS2 powder is a useful starting point for many dry film coating, additive blending and precision applications. Nano or custom grades may be suitable for research or advanced dispersion needs. Final selection should consider substrate, temperature, load, carrier medium and application method.

How is WS2 powder applied?

WS2 powder can be applied as a dry film coating by spray, buffing or tumbling methods, or blended into oils, greases and synthetic lubricants as an additive. Surface preparation, dispersion and process control affect performance.

Can WS2 powder be used in vacuum applications?

Yes. WS2 powder is commonly considered for vacuum-related lubrication because dry solid lubricants can be useful where conventional oils and greases may migrate, evaporate or become unsuitable.

Can WS2 powder be used in engine oil or grease?

WS2 powder can be evaluated as an additive in oils, greases and synthetic lubricants. Blending percentage and compatibility should be validated for the specific lubricant, component, load and operating environment.

Is tungsten disulfide powder hazardous?

Always review the latest Safety Data Sheet before handling. WS2 dust may cause respiratory irritation and may irritate skin or eyes. Use adequate ventilation and appropriate PPE such as gloves, eye protection and respiratory protection where dust is present.

What documents should procurement teams request?

Procurement teams should request the latest product brochure, Safety Data Sheet, available grade details, particle size information, packaging options and any required technical documentation before ordering. Contact Lowerfriction to request documents.

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Lowerfriction Lubricants
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sku: MK-WS2-06

Tungsten Disulfide (WS2) Powder, 0.6 micron

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Lowerfriction Lubricants
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sku: MK-WS2-06

Tungsten Disulfide (WS2) Powder, 0.6 micron

Product # MK-WS2-06 Tungsten Disulfide PowderWS2, 99.9% Pure, APS: 0.6 micron All prices are in US Dollar. This is Non-Hazardous product. Please select only Non-Hazardous shipping options on online order form

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Now: $144.00
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Lowerfriction Lubricants

sku: MK-WS2-06

Tungsten Disulfide (WS2) Powder, 0.6 micron

Lowerfriction Lubricants

sku: MK-WS2-06

Tungsten Disulfide (WS2) Powder, 0.6 micron