Acetals Data Sheet

||Acetals Data Sheet
Acetals Data Sheet2018-04-26T11:29:50+00:00

Acetal copolymer is a family of engineering thermoplastics based on formaldehyde polymerization technologies.  Acetals have an exceptional balance of tensile properties, shear strength, stiffness and toughness.  They are natural bearing materials because they exhibit a very low friction coefficient against metals, acetal and other plastics.  Delrin® is the brand name for the homopolymer acetal and is a highly versatile engineering plastic with metal like properties.

CCT Precision Machining is an industry leader in Delrin® and Acetals machining.  We are able to maintain tolerances, create features and produce parts that even the material manufacturers deem impossible. By using high speed spindles capable of turning at 30,000 RPM, tightly controlled work envelopes and cutting edge work holding systems, CCT Precision can machine thermoplastic components from the most simple part to the most intricate part on any of the 25+ machines in our facility.

  • 27” x 15” x 13” Work Envelope
  • Tolerances to +/- .00025” (0.006 mm)
  • Hole Diameters to 0.003” (0.076 mm)

If precision machining of Delrin® parts is what you are looking for, Request a Quote today.

Acetron GP Acetal Delrin Acetal Delrin 570 Blend 25% Glass-Filled Acetal Copolymer Delrin AF-Filled Acetal Acetron NS-Filled Acetal Delrin 500 CL
Mechanical ASTM Test Method Polyoxy-methylene Copolymer Polyoxy-methylene Homopolymer 20% Glass-Filled POM Homopolymer 25% Glass-Filled POM Homopolymer PTFE-Filled POM Homopolymer Lubricated POM Copolymer Lubricated POM Homopolymer Units
Strength to Weight Ratio - - - - - - - - ksi
Specific Gravity @73 F D792 1.41 1.41 1.56 1.59 1.50 1.44 1.42 -
Tensile Strength @73 F, (ult)/(yld) D638 9,500 (ult) 11,000 (ult) 8,500 (ult) 16,000 (yld) 8,000 (ult) 7,500 (ult) 9,500 (yld) psi
Tensile Modulus of Elasticity @73 F D638 400,000 450,000 900,000 1,200,000 435,000 400,000 450,000 psi
Tensile Elongation at Break @73 F D638 30 30 12 2-3% 15 10 40 %
Flexural Strength @73 F D790 12,000 13,000 10,700 - 12,000 15,000 13,000 psi
Flexural Modulus of Elasticity @73 F D790 400,000 450,000 730,000 1,050,000 445,000 400,000 400,000 psi
Shear Strength @73 F D732 8,000 9,000 - - 76,000 6,000 - psi
Comprehensive Strength, (% Deformation) @73 F D695 15,000 (10) 16,000 (10) - - 16,000 (10) 15,000 (10) 4,500 (10) psi
Comprehensive Modulus of Elasticity @73 F D695 400,000 450,000 - - 350,000 315,000 - psi
Hardness, Rockwell, Scale as noted @73 F D785 M88 (R120) M89 (R122) M90 (R118) M80 M85 (R115) M85 (R116) M90 (R120) -
Hardness, Durometer, Shore D @73 F D2240 D85 D86 - - D83 D83 - -
Izod Impact, (Notched) @73 F D256 Type A 1.0 1.0 0.8 1.1 0.7 0.7 1.4 ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic - 0.25 0.25 0.34 - 0.19 0.20 - -
Limiting PV, (with 4 to 1 factor of safety applied) - 2,700 2,700 - - 7,500 7,500 - psi-ft/min
Thermal ASTM Test Method Polyoxy-methylene Copolymer Polyoxy-methylene Homopolymer 20% Glass-Filled POM Homopolymer 25% Glass-Filled POM Homopolymer PTFE-Filled POM Homopolymer Lubricated POM Copolymer Lubricated POM Homopolymer Units
Coefficient of Linear Thermal Expansion @73 F E-831 (TMA) 5.4E-04 4.7E-05 4.5E-05 2.2E-05 5.0E-05 4.7E-05 6.8E-05 in/in/F
Heat Deflection Temperature @264 psi D648 220 250 316 322 244 250 257 F
Tg-Glass transition termperature, (Amorphous) D3418 - - - - - - - F
Melting Point, (VS=Vicat Softening Temp.) D3418 335 347 347 - 347 347 347 F
Continuous Service Temperature in Air, (Max.) - 180 180 185 - 180 180 - F
Thermal Conductivity - 1.60 2.5 - - - - - BTU-in /
hr-ft2-F
Electric ASTM Test Method Polyoxy-methylene Copolymer Polyoxy-methylene Homopolymer 20% Glass-Filled POM Homopolymer 25% Glass-Filled POM Homopolymer PTFE-Filled POM Homopolymer Lubricated POM Copolymer Lubricated POM Homopolymer Units
Dielectric Strength, Short Term D149 420 450 490 - 400 350 400 Volts/mil
Volume Resistivity D257 1.0E+17 1.0E+15 5.0E+14 - 3.0E+16 1.0E+15 1.0E+15 ohm-cm
Dielectric Constant @10E6 Hz D150 3.8 3.7 - - 3.1 - 3.5 -
Dissipation Factor @10E6 Hz D150 0.005 0.005 0.006 - 0.010 - 0.006 -
Flammability @3.1 mm unless noted UL94 HB HB HB - HB HB HB (0.78mm) -
H2O ASTM Test Method Polyoxy-methylene Copolymer Polyoxy-methylene Homopolymer 20% Glass-Filled POM Homopolymer 25% Glass-Filled POM Homopolymer PTFE-Filled POM Homopolymer Lubricated POM Copolymer Lubricated POM Homopolymer Units
Water Absorption, Immersion, 24 hours D570(7) 0.20 0.20 0.25 0.29 0.20 0.20 0.27 % by weight
Water Absorption, Saturation D570(7) 0.90 0.90 1.00 - 1.0 0.90 0.90 % by weight