Material properties

The combination of special properties of HAWAMID PA 12G

The special feature of HAWAMID PA 12G is that it combines two important properties. Alternative materials such as POM or PA 6G may have individual material parameters that are superior in terms of e.g. strength, heat deflection temperature or abrasion resistance – but only if observed in isolation. As soon as they are subjected to environmental stress such as dampness, heat, cold, chemical substances etc., the material property values generally decrease rapidly.

HAWAMID PA 12G maintains its mechanical properties across a wide range of temperatures, absorbs the least amount of water amongst all polyamides and, to a great extent, is resistant to chemicals. What is decisive is the interaction between the required mechanical properties when subjected to the existing environmental conditions in the correct application.

This data printout contains guiding values. These values can be influenced by processing conditions, modifications, material additives and ambient influences and do not exempt the user from performing his own tests and trials. They have been compiled according to our current experience and knowledge. No legally binding guarantee of certain properties or suitability for concrete applications can be derived from our specifications.

It is the responsibility of the recipient of our products to observe possible property rights as well as existing laws and provisions.

Material properties of HAWAMID PA 12G
Test methodUnit of measurePolyamidesPOM
DescriptionHAWAMID HWHAWAMID HIHAWAMID + ÖlPOM
Description ISO/DINPA 12GPA 12G HIPA 12G +ÖlPA 6GPOM C
General properties
DensityDIN 53479g/cm³1,031,031,0251,15 – 1,171,41
Moisture absorption%0,90,90,75/0,8520,2
Feuchtigkeitsaufnahme bei Sättigung%1,11,116 – 70,8
Max. water absorption in standard atmospheric conditions 23°CGew.-%ca. 1,10,75/0,8
Mechanical characteristics
Tensile strengthDIN 53455N/mm²6662648572
Elongation at tearDIN 53455%10121160 250*35
Elastic modulus tensile testDIN 53457N/mm²2200210021003000 1900*2750 – 3000
Tensile stress after 1000 h at 1% elongationDIN 53444N/mm²4036362114
Bending strength dryDIN 53452N/mm²908510094
Elastic modulus bending testDIN 53452N/mm²2400220033002500
Permissible pressure load at 0.1 % compressionDIN 53505N/mm²46423235
HardnessShoreD7872768085
Ball indentation hardnessDIN 53456N/mm²10610095140150
Antifriction properties (compared to steel)µ0,350,380,180,21 – 0,40,15 – 0,35
Friction wear (compared to steel)µm/km0,20,20,10,108,9
PV guiding value at v = 0.1 m/s p ~ 24 N/mm² dryN/mm² * m/s0,15 – 0,120,15 – 0,120,25 – 0,300,130,15
Friction coefficient static0,350,350,35o. A.o. A.
Friction coefficient dynamic0,400,400,4o. A.o. A.
Elongation at yield pointDIN 53455%79915 – 30
Elongation at break%91110>30
Impact strength (Chapy) 20°CKJ/m²8 – 1212 – 1510 – 125 – 67
Impact strength (Chapy) -50°CKJ/m²6 – 108 – 128 – 104 – 55
Abrasion resistanceTaber-Abrazermg/100 U2424
Impact strength 23°CmJ/mm²110140130>150
Impact strength -30°CmJ/mm²658080
Vicat-B-50 softening temperature°C188 ±3177 ±3185 ±3210140
Thermal properties
Temperature limit in the application Constant (bottom and top temp.)°C-50 bis 120-40 bis 100-50 bis 80
Temporary°C150120100
Constant temperature (<104 h) in oil°C140
Constant temperature (<104 h) in water°C90
Constant temperature (<104 h) in air°C120
Therm. coefficient of linear expansionDIN 52328K-1*10-58 – 1098 – 10912
Coefficient of linear expansion -50°C – (-30°C)VDE 030410-4 °C0,8 – 1,0
Coefficient of linear expansion +30°C – (+80°C)VDE 030410-4 °C1,0 – 1,8
Coefficient of thermal conductivityDIN 52612W/m*K0,23
UL flammability ratingUL94HB
Application temperature max. temporary°Cbis 150
Vicat-B-50 softening temperatureDIN 53460°C182 – 190
Heat distort resistance air humidityISO/R75/B°C185 – 190
Specific heatkJ/kg K2,4
Brittling in cold°C≤ -50≤ -50
Electrical properties test sample 24 h in standard atmospheric conditions 23/50 conditioned
Spec. volume resistivity at 23 °CDIN 53482Ω cm2,7 * 101410¹² /1010*1014
Spec. volume resistivity at 70 ℃Ω cm1,0 * 1014
Surface resistanceDIN 53482 Verf. ROAΩ101310121013
Percussion strengthDIN 53481kV/mm3020>16
Relative permittivity (103 Hz) at 23°CDIN 534833,5 (bei 50 Hz)3,73,7
Dissipation factor (103 – 106 Hz)DIN 534830,038 (bei 50 Hz)0,030,005
Track resistance KBDIN 53480KB 550
Track resistance KCDIN 53480KC 600> 600
Area of application
Acid resistanceCCB
Alkali resistanceAAB
Hot water resistance (hydrolysis)B – CB – CB
UV radiation (outside use)BB/ sw AC/ sw A

A = no corrosion
B = slight corrosion
C = moderate corrosion, low absorption
D = disintegrated in short time

HW: Highly wear-resistant
HI: Highly impact-resistant

* damp 23 °C / 50 % humidity