eFunda Polymers: Properties of Polyamide {nylon (PA 12), molding and extrusion compound}
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Polyamide		  
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State: nylon (PA 12)
Application: molding and extrusion compound
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   249 - 1242  tensile  dry (0.2% water content) D638
Flexural Modulus (MPa)   187 - 1311   23 ºC  dry (0.2% water content) D790
Tensile Strength (MPa)   36 - 69 at break  dry (0.2% water content) D638
  56 at break  50% relative humidity D638
  21 - 43 at yield  dry (0.2% water content) D638
Flexural Strength (MPa)
at yield or break		   10 - 56  dry (0.2% water content)   D790
Elongation at break (%)   250 - 390     D638
Hardness   70 - 109  Rockwell R  dry (0.2% water content) D638
 105  Rockwell  50% relative humidity D638
  58 - 75  Shore D  50% relative humidity D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.5 - 57.8     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   61 - 100     D696
Deflection Temperature (ºC)   70 - 150   0.46 MPa  dry (0.2% water content) D648
  35 - 58   1.82 MPa  dry (0.2% water content) D648
Thermal Conductivity (W/m-ºC)  0.217 - 0.305     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.01 - 1.02   D792
Water Absorption (% weight increase)  0.75 - 1.6  saturated D570
 0.25 - 0.3  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   450  dry (0.2% water content) D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  125 - 155  Tg, amorphous  
Melting Temperature (ºC)  160 - 209  Tm, crystalline  
Processing Temperature (ºC)  180 - 274  injection molding  
 177 - 260  extrusion  
Molding Pressure (MPa)   7 - 104    
Compression Ratio  2.5 - 4    
Linear Mold Shrinkage (cm/cm)  0.003 - 0.015   D955

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Suppliers
ALM Corp. Wayne, NJ   
Ashley Polymers Brooklyn, NY   
Creanova, Inc. Somerset, NJ   
Elf Atochem North America, Inc. Philadelphia, PA  800-225-7788
EMS-American Grilon, Inc. Sumter, SC   

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