UHMW
| Mechanical |
| Property | ASTM Test | Units Metric(US) | Typical Values |
| Density | D 792 | gm/cm3 | 0.926-0.934 |
| Tensile strength @ Yield | D 638 | MPa (psi) | 21(3,100) |
| Tensile strength @ Break | D 638 | MPa (psi) | 48(7,000) |
| Elongation @ Break | D 638 | % | 350 |
| Youngs (“E”) Modulus (23°C) | D 638 | MPa(psi X 105) | 690(1.0) |
| Youngs (“E”) Modulus (-269°C) | D 638 | MPa(psi X 105) | 2,970(4.3) |
| Izod Impact Strength (23°C) | D 256 (1) | J/m(ft-lb/in notch) | 140(30) |
| Izod Impact Strength (-40°C) | D 256 (1) | J/m(ft-lb/in notch) | 100(21) |
| Hardness, Shore “D” | D 2240 | - | 62-66 |
| Abrasion Resistance | (2) | - | 100 |
| Water Absorption | D 570 | % | Nil |
| Relative Solution Viscosity | D 4020 | dl/gm | 2.3-3.5 |
- Izod Impact Strength: samples have two (15° ± 1/2°) notches on opposite sides to a depth of 5 mm.
- Abrasive wear is measured in the laboratory by a “sand/water-slurry test”, in which a sample is rotated at high velocity in a sand/water slurry for 24 hours. The following table gives an indication of the abrasion resistance of DURAVAR UHMW polymer. A value of 100 was designed for the amount of volumetric abrasion loss to UHMW specimen. The values shown for other materials are their relative loss compared to DURAVAR. The higher the figure, the greater the abrasion loss.
- DURAVAR (UHMW-PE): 100
- Acetal Copolymer (POM): 700
- Stainless Steel: 160
- Polyvinyl Chloride (PVC): 920
- Polytetrafluoroethylene(PTFE): 530
- Polymethylmethacrylate(PMMA): 1,800
- PTFE(25% Glass Fiber): 570
- Phenolic Resin (PF): 2,500
- Low Density polyethylene (LDPE): 600
- Beechwood: 2,700
- Polypropylene (PP): 660
- Epoxy Resin (EP): 3,400
| Thermal |
| Property | ASTM Test | Units Metric(US) | Typical Values |
| Crystalline Melting Range, Powder | Polarized Microscope | °C(°F) | 138-142(280-289) |
| Coefficient of Linear Expansion | | | |
| 20 to 100°C | D696 | K-1 | ~2 X 10-4 |
| -200 to -100°C | D696 | K-1 | ~0.5 X 10-4 |
| Electrical |
| Property | ASTM Test | Units Metric(US) | Typical Values |
| Volume Resistivity | D 257 | O cm | >5 X 1016 |
| Dielectric Strength | D 149 | KV/cm (V/mil) | 900(2,300) |
| Dielectric Constant | D 150 | - | 2.30 |
| Dissipation Factor | D 150 | | |
| At 50 Hz | | - | 1.9 X 10-4 |
| 103Hz | - | | 0.5 X 10-4 |
| 105Hz | - | | 2.5 X 10-4 |
Comparison of Dynamic Coefficient of Friction on Polished Steel
| Property | UHMW-PE | Nylon 6 | Nylon 6/6 | Nylon/MoS2 | PTFE | Acetal Copolymer |
| Dry | 0.10 - 0.22 | 0.15 - 0.40 | 0.15 - 0.40 | 0.12 - 0.20 | 0.04 - 0.25 | 0.15 - 0.35 |
| Water | 0.05 - 0.10 | 0.14 - 0.19 | 0.14 - 0.19 | 0.10 - 0.12 | 0.04 - 0.08 | 0.10 - 0.20 |
| Oil | 0.05 - 0.08 | 0.02 - 0.11 | 0.02 - 0.11 | 0.08 - 0.10 | 0.04 - 0.05 | 0.05 - 0.10 |
General Machining Guidelines
- Cutting: Band Saw: 3,300 – 6,600 ft./min. circular saws: 10,000 – 13,000 ft/min.
- Turning: Up to 2,000 ft/min.
Note: Higher cutting, turning, and drilling speeds may require compressed air, water, or cutting oil for cooling.The information herein contained is based upon data believed to be thoroughly reliable, but no guaranty or warranty with respect to accuracy or completeness or product result is implied and no liability is assumed. It is the responsibility of the user to verify suitability of the material for their particular use or purpose. In view of the many uses of this material and the different equipment and processing techniques used, we cannot guarantee results in specific instances. No statement contained herein should be construed as a recommendation or license to use our products in a manner that would constitute infringement of any patent.
Title: Physical Properties for UHMW Board Stock & Angle
Description: Physical, Mechanical, Electrical and Thermal Typical Properties.
Published: 1/27/2009
Last Edited: 1/12/2023
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