Looking for High-Performance Plastic Components?
Delrin 570is a 20% glass filled acetal homopolymer blend. DuPont Delrin® is a popular acetal homopolymer brand name, and the most commonly used acetal homopolymer. The combination of glass in Delrin® acetal resin gives this material excellent stiffness, strength, and stability. This combination offers higher mechanical properties at elevated temperatures.
It is commonly utilized in spools, fixtures, and electrical components where dimensional stability and enhanced mechanical and insulating properties are required.
Available in sheet and rod, it is easily machined with standard metal working equipment. Tolerances of +/-.0005 can be achieved with experience. The glass can lead to some premature wear of tooling, so care should be taken to avoid excessive tool speeds.
| Specification | Test | Value | Units |
| Specific Gravity, 73°F | D792 | 1.56 | – |
| Tensile Strength @ Yield, 73°F | D638 | 7700 | psi |
| Tensile Modulus of Elasticity, 73°F | D638 | 860000 | psi |
| Tensile Elongation (at break), 73°F | D638 | 10 | % |
| Flexural Strength, 73°F | D790 | 14500 | psi |
| Flexural Modulus of Elasticity | D790 | 650000 | psi |
| Shear Strength, 73°F | D732 | - | psi |
| Compressive Strength – Ultimate | - | psi | |
| Compressive Strength at 1% Deformation | D695 | 1500 | psi |
| Compressive Strength at 10% Deformation | D695 | 14500 | psi |
| Deformation Under Load | < 2 | % | |
| Compressive Modulus of Elasticity, 73°F | D695 | - | |
| Compressive Strength ⊥ to Laminate (Modulus) | psi | ||
| Compressive Strength ⊥ to Laminate (Yield) | 1450 | psi | |
| Compressive Strength ⊥ to Laminate (Ultimate) | 1450 | psi | |
| Hardness, Durometer (Shore “D” scale) | D2240 | D83 | |
| Hardness, Rockwell (Scale as noted) | D785 | 87 | Rockwell M |
| Izod Impact, Notched @ 73°F | D256 Type A | 0.6 | ft.lbs/in. of notch |
| Coefficient of Friction (Dry vs Steel) Static | PTM 55007 | - | |
| Coefficient of Friction (Dry vs Steel) Dynamic | PTM 55007 | - | |
| Maximum Static Bearing Load (P) | PTM 55007 | - | psi |
| Maximum Unlubricated No Load Bearing Velocity (V) | PTM 55007 | - | ft/minute |
| Maximum Limiting PV (Unlubricated) | PTM 55007 | - | psi x ft/min. |
| Wear Factor “K” x 10-10 | PTM 55010 | - | Cubic in.-min/ft.lbs.hr |
| Sand Wheel Wear/Abrasion Test | - | UHMW=100 | |
| Minimum Mating Surface Hardness | - | Rockwell (Brinnell) | |
| Coefficient of Linear Thermal Expansion | E-831 (TMA) | 4.72 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion // to Laminates | E-831 (TMA) | 4.72 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion I to Laminates | E-831 (TMA) | 4.72 | in/in/°F x 10-5 |
| Softening Point | - | °F | |
| Heat Deflection Temperature 264 psi | D648 | 311 | °F |
| Embrittlement Temperature | - | °F Min. | |
| Continuous Service Temperature in Air | 185 | °F Max. | |
| Short Term Service Temperature | 300 | °F Max. | |
| Tg-Glass Transition (Amorphous) | D3418 | °F | |
| Melting Point (Crystalline) Peak | D3418 | 347 | °F |
| Thermal Conductivity | F433 | BTU-in/(hr/ft2°F) | |
| Dielectric Strength Short Term | D149 | 452 | Volts/mil |
| Volume Resistivity | D257 | >8x1014 | ohm/cm |
| Surface Resistivity | D257 | >2x1015 | ohm/cm |
| Dielectric Constant, 106 Hz | D150 | 3.8 | |
| Dissipation Factor, 106 Hz | D150 | 0.006 | |
| Flammability @ 1.47mm(1/16 in.) UL94 | UL94 | HB | |
| Arc Resistance | seconds | ||
| Water Absorption, Immersion 24 Hours | D570 (2) | 0.15 | % |
| Water Absorption, Immersion Saturation | D570 (2) | 1 | % |
| Machinability Rating | 3 | 1=easy, 10=difficult | |
| Rod Diameter Availability (Off the Shelf) | 0.125 | 6 | inches |
| Sheet Thickness Availability (Off the Shelf) | 0.25 | 3 | inches |