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Tech Data

Lubra Plex 4000



Packaging 14 ounce cartridge; 40 pound container
Net Weight
14 ounces (400 grams); 40 lbs (18 kg)
Appearance/Color Semi-Solid, Black
Odor Characteristic Petroleum
pH Range N/A
Flammability Slight
Vapor Pressure <0.01 (mm Hg)
Vapor Density >5 (air + 1)
Flash Point 662°F (350°C)
Boiling Point N/A
Dropping Point >608°F (>320°C)
Application Temperature Range -4°F (-20°C) to 1472°F (800°C)
Corrosion No color change (T2sheet copper, 100°C, 24 h)
Evaporation Loss % <0.4 (150°C, 22h)
Water Washout % <3.5 (38°C, 1h)
Coefficient Of Friction 0.015
Solubility In Water Insoluble
Extinguishing Media Dry Chemical, Carbon Dioxide, Foam, Water Spray
Materials To Avoid Acids, Strong Oxidizing Agents
Conditions To Avoid Extended exposure to high temperatures can cause decomposition
Storage Store in approved, tightly closed, containers in cool, dry, well-ventilated areas away from incompatible material, heat, and all sources of ignition
Shelf Life 2 Years


 Comparison of the Physical & Technical Properties of Tungsten Disulfide and Moybdenum Disulfide


Properties Tungsten Disulfide (WS2)CAS No 12138-09-9 Molybdenum Disulfide (MoS2)CAS No 1317-33-5
Color Silver Gray Blue-Silver Gray
Appearance Crystalline Solid Crystalline Solid
Melting Point (º C) 1250º C, 1260º C (decomposes) 1185º C (decomposes)
Boiling Point   450º C
Density 7500Kg.m-3 5060 Kg.m-3
Molecular Weight 248 160.08
Coefficient of Friction 0.03 Dynamic; 0.07 Static  
Thermal Stability in Air COF <0.1 till 1100ºF (594ºC) COF <0.1 @600ºF (316ºC) increases to 0.5 @1100ºF (594ºC)
Thermal Stability in Argon COF <0.1 till 1500ºF (815ºC) COF increases rapidly starting @800ºF (426ºC)COF >0.1 @900ºF (482ºC)
Load Bearing Ability 300,000 psi for coated filmCOF:0.044 @ 20,000 psiCOF reduces to 0.024 between 200,000 to 400,000 psi 250,000 psi
Lubrication Temperature Range Ambient: from -273ºC to 650ºC Vacuum(10-14 Torr): from -188ºC to 1316ºC Ambient: from -185ºC to 350ºC Vacuum: from -185ºC to 1100ºC
Chemical Durability Inert Substance,Non-Toxic Inert Substance, Non-Toxic
Magnetism Non-Magnetic Non-Magnetic
Electrical Properties Has Semiconductor properties  
Rockwell Hardness 30HRc  
Coating Film Thickness 0.5 micron  
Corrosion Stability Can slow down the corrosion rate, but can not fully prevent substrate corrosion  
Coatable Substrates Iron, Steel, Aluminum, Copper, other Metals, Plastics and Manmade Solids  
Compatibility Oil, Solvent, Paint, Fuel Oil, Solvent, Paint, Fuel