Acetron™/Ertacetal™ H POM-H is a polyoxymethylene homopolymer acetal grade that offers superior mechanical strength, stiffness, hardness and creep resistance, in addition to a much lower thermal expansion rate and increased wear resistance when compared to copolymer acetal grades. Due to these characteristics, Acetron™ POM-H/Ertacetal™ H POM-H excels in a variety of applications including small diameter, thin-walled bushings and bearings, gears, electrical components, valves and fluid handling components.
PROPERTIES
Excellent mechanical properties allows use of standard fasteners
Excellent stability and machining properties reduce machining cost
Durability of material allows easy installation and removal (low distortion)
Chemical resistance enables very long service lifetime
High impact strength, even at low temperatures
Very good dimensional stability (low water absorption)
Thermal Properties
Property
Value
Heat Deflection Temperature at 1.8MPa (264 psi) (ºC)
110
Continuous allowable service temperature in air
90
Mechanical Properties
Property
Value
Tensile Strength (MPa)
78
Tensile Modulus of Elasticity (MPa)
3,700
Compressive stress at 1% nominal strain (MPa)
29
Compressive stress at 2% nominal strain (MPa)
49
Compressive stress at 5% nominal strain (MPa)
85
Flexural Strength (MPa)
106
Charpy Impact Notched (kJ/m²)
10.0
Chemical Properties
Property
Value
Hot Water / Steam
Limited
Acids, Weak
Limited
Acids, Strong (pH 1-3)
Not acceptable
Alkalies, Weak
Acceptable
Alkalies, Strong (pH 11-14)
Limited
Hydrocarbons - Aromatic
Acceptable
Hydrocarbons - Aliphatic
Acceptable
Ketones, Esters
Acceptable
Chlorinated Solvents
Limited
Alcohols
Acceptable
Inorganic Salt Solutions
Acceptable
Electrical Properties
Property
Value
Dielectric Strength (kV/mm)
20
Certification Properties
Property
Value
FDA
Compliant
European Food Approval
Not compliant
NSF
Compliant
3A-SSI
Not compliant
Canada AG
USDA
Compliant
Flammability (UL Rating)
HB
Medical use
FOOD - FDA FOOD - USDA
Miscellaneous Properties
Property
Value
Base Material
POM-H
Brand Family
Colors
Natural Black
Density (g/cm3)
1.43
Water Absorption after 24 hrs immersion in water (%)
