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Data Availability

Although MatWeb makes every effort to find all available material property data, some material properties are not available for every entry in the database.  The table below will give you some guidance to help you make the best possible use of our quantitative searches on the Property Search Page or Advanced Search.

If you are searching for materials that meet your property specification(s), and a material in MatWeb does not have that data point available, then that material is not returned from the search.  Do not let this discourage you from using our powerful Property Search for these reasons:

Percentage of Entries for Which a Given Property Value Is Available in MatWeb

PropertyPolymerMetalCeramic
Arc Resistance, sec10%  
CTE, linear 20ºC, µm/m-°C30%64%43%
CTE, linear 250ºC, µm/m-°C1%58%17%
CTE, linear 500ºC, µm/m-°C 51%10%
CTE, linear 1000ºC, µm/m-°C 23%11%
Coefficient of Friction4%  
Comparative Tracking Index, V13%  
Compressive Yield Strength, MPa15%4%24%
Deflection Temperature at 1.8 MPa, ºC59%  
Deflection Temperature at 0.46 MPa, ºC44%  
Density, g/cc93%90%76%
Dielectric Constant25% 25%
Dielectric Constant, Low Frequency (Polymers)14%  
Dielectric Strength, kV/mm 24% 15%
Dissipation Factor23% 14%
Dissipation Factor, Low Frequency (Polymers)14%  
Electrical Resistivity, Ohm-cm40%80%28%
Elongation %; break81%85%7%
Emissivity (0-1) 1%1%
Fatigue Strength, MPa1%6%0%
Flammability, UL94 (5=V-0; 4=V-1; 3=V-2; 1=HB) 47%  
Flexural Modulus, GPa64%1%1%
Flexural Yield Strength, MPa51%0%0%
Fracture Toughness, MPa-m½0%2%8%
Glass Temperature, ºC5%  
Gloss, %4%  
Hardness, Barcol1%  
Hardness, Brinell 48% 
Hardness, Knoop 50% 
Hardness, Rockwell A 7% 
Hardness, Rockwell B 39% 
Hardness, Rockwell C 37% 
Hardness, Rockwell E1%  
Hardness, Rockwell M6%  
Hardness, Rockwell R24%  
Hardness, Shore A7%  
Hardness, Shore D10%  
Hardness, Vickers 49%0%
Haze, %5%  
Heat Capacity, J/g-°C3%70%15%
Heat of Fusion, J/g 7%2%
Impact Strength, Charpy, in J or J/cm²11%16%0%
Impact, Unnotched Charpy, J/cm² (Polymers)9%  
Impact, Low T Notched Charpy, J/cm² (Polymers)6%  
Impact, Low T Unnotched Charpy, J/cm² (Polymers)7%  
Impact Strength, Izod, in J, J/cm, or J/cm²61%11%1%
Impact Strength, Unnotched Izod, J/cm (Polymers)23%  
Impact, Low T Notched Izod, J/cm (Polymers)6%  
Linear Mold Shrinkage, cm/cm56%  
Liquidus, °C 41%1%
Maximum Service Temperature, Air, °C42%10%28%
Melt Flow, g/10 min37%  
Melting Point, °C20%44%28%
Modulus of Elasticity, GPa54%76%31%
Moisture Vapor Transmission, g-mm/m²-24hr-atm2%  
Oxygen Index, %7%  
Oxygen Transmission, cc-mm/m²-24hr-atm2%  
Poissons Ratio2%16%12%
Processing Temperature, ºC30%  
Reflection Coefficient, Visible (0-1)0%2%8%
Refractive Index2% 15%
Shear Modulus, GPa0%47%7%
Solidus, °C 39%4%
Surface Resistance, Ohm18%  
Tensile Strength, Ultimate, MPa70%90%21%
Tensile Strength, Yield, MPa33%82% 
Thermal Conductivity, W/m-K12%80%40%
Transmission, Visible, %4% 9%
UL RTI, Electrical, ºC7%  
UL RTI, Mechanical with Impact, ºC7%  
UL RTI, Mechanical without Impact, ºC6%  
Vicat Softening Point, ºC20%  
Water Absorption, %48% 9%
Moisture Absorption at Equilibrium, % (Polymers)5%  
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