Acetal
Typical Properties of Acetal Copolymer & Delrin®
|
Property |
Test Method | Acetal Copolymer | Delrin® | Delrin®AF |
|
Mechanical Properties |
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|
Specific Gravity |
ASTM D792 | 1.41 | 1.42 | 1.50 |
|
Density (lb/in³) |
ASTM D792 | 0.0509 | 0.0515 | – |
|
Tensile Strength, Break (p.s.i.) |
ASTM D638 | 9,800 | 10,000 | 7,600 |
|
Elongation At Break (%) |
ASTM D638 | 75 | 75 | 22 |
|
Tensile Modulus (p.s.i.) |
ASTM D638 | 430,000 | 450,000 | 420,000 |
|
Rockwell Hardness |
ASTM D785 | M80 | R120 / M94 | R118 / M78 |
|
Impact Strength 73°F Notched (ft-lbs/in) |
ASTM D256 | 1.0 | 2.3 | 1.2 |
|
Flexural Strength (p.s.i.) |
ASTM D790 | 13,000 | 14,300 | 10,500 |
|
Flexural Modulus (p.s.i.) |
ASTM D790 | 370,000 | 420,000 | 340,000 |
|
Coefficient Of Friction (Dynamic) |
40psi 50fpm | 0.21 | 0.20 | 0.16 |
|
Thermal Properties |
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|
Melting Point (°F) |
– | 330 | 347 | 347 |
|
Heat Deflection at 66psi (°F) |
ASTM D648 | 316 | 336 | 334 |
|
Heat Deflection at 264psi (°F) |
ASTM D648 | 230 | 257 | 244 |
|
Max Service Temperature Short Term (°F) |
– | 285 | 300 | 300 |
|
Max Service Temperature Long Term (°F) |
– | 195 | 185 | 185 |
|
Thermal Conductivity (BTU-in/ft²-hr-°F) |
ASTM C177 | 1.60 | 2.60 | – |
|
Coefficient of Linear Thermal Expansion (in/in/°F) |
ASTM D696 | 0.000061 | 0.000068 | 0.000068 |
|
Flammability |
UL94 | HB | HB | HB |
|
Electrical Properties |
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Dielectric Constant At 60HZ |
ASTM D150 | 3.8 | 3.7 | 3.1 |
|
Dissipation Factor At 60HZ |
ASTM D150 | 0.003 | 0.005 | 0.009 |
|
Dielectric Strength (V/mil) |
ASTM D149 | 500 | 500 | 400 |
|
Water Absorption Rates |
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|
Water Absorption -24 hrs. (%) |
ASTM D570 | 0.20 | 0.25 | 0.20 |
|
Water Absorption -Saturation (%) |
ASTM D570 | 0.80 | 0.90 | 0.72 |
NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets.