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Typical Properties of Acetal Copolymer & Delrin®

Property

Test Method Acetal Copolymer Delrin® Delrin®AF

Mechanical Properties

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

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

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

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.

 
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