UHMW
Gar-Dur® UHMW
This chart shows the physical properties of Gar-Dur®. It should be noted that Gar-Dur® UHMW has the highest impact resistance of all thermal plastics. Gar-Dur® has outstanding low-temperature impact strength plus high energy absorption. As an example of toughness, Gar-Dur® UHMW is used in mallet faces and hammer heads.
| Property | Units | ASTM Test Procedure | Result |
| Density at 23°C.(73°F) | g/cc. | D 792 | 0.941 |
| Hardness, Rockwell “R” | R | D 785 | 64 |
| Ultimate Tensile Strength at 2”/min. | psi | D 638 | 6,400 |
| Tensile Yield Strength at 2”/min. | psi | D 638 | 3,400 |
| Tensile Yield Elongation at 2”/min. | % | D 638 | 14 |
| Elongation at Break at 2”/min. | % | D 638 | 350 |
| 1% Secant Modulus | psi | D 790B | 175,000 |
| Izod Impact at 23°C (73°F) | f.p.i.n. | D 256 A | Non-break |
| Izod Impact at -40°C. | f.p.i.n. | D 256 A | Non-break |
| Durometer Hardness (Shore D) | D/15 sec. | D 2240 | 67 |
| Deflection Temp. at 66 psi | °C | D 648 | 80 |
| Deflection Temp. at 264 psi | °C | D 648 | 47 |
| Vicat Softening point | °C | D 1525 B | 136 |
| Coefficient of Linear Thermal Expansion | in/in/°F | D 696 | 9.1 X 10-5 |
Notes:
- Crystalline melting point 130-131°C. = (267°F)
- Stress Crack (ASTM D 1693 modified) = None
- This material will not absorb moisture.
Compression Deformation
This chart illustrates the compression strength of Gar-Dur® UHMW for engineering purposes.
| Compressive Stress
psi | Compressive Values
% | Permanent deformation 24 hours after removal of stress
% |
| 20°C (68°F) | 282 | 0.9 | 0.6 |
| 570 | 1.8 | 1.2 |
| 850 | 2.7 | 1.8 |
| 1,140 | 3.6 | 2.4 |
| 1,420 | 4.5 | 2.9 |
| 1,700 | 5.4 | 3.5 |
| Compressive Stress
psi | Compressive Values
% | Permanent deformation 24 hours after removal of stress
% |
| 50°C (122°F) | 282 | 1.3 | 0.8 |
| 570 | 2.7 | 1.5 |
| 850 | 4.1 | 2.3 |
| 1,140 | 5.5 | 3.1 |
| 1,420 | 6.9 | 3.9 |
| 1,700 | 8.2 | 4.7 |
| Compressive Stress
psi | Compressive Values
% | Permanent deformation 24 hours after removal of stress
% |
| 80°C (176°F) | 282 | 1.6 | 1.1 |
| 570 | 3.2 | 2.3 |
| 850 | 4.8 | 3.5 |
| 1,140 | 6.4 | 4.6 |
| 1,420 | 8.1 | 5.8 |
| 1,700 | 9.7 | 6.9 |
Property values reflect typical average values and are provided as a general guide only, not for design purposes.
Title: Physical Properties for UHMW Bar, Rod, & Tube
Description: Physical, Mechanical, Electrical and Thermal Typical Properties.
Published: 1/27/2009
Last Edited: 1/12/2023
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