Cast Nylon MD


What is the Material: Cast Nylon MD is a semi-crystalline material filled with Molybdenum disulfide (also called MoS2 or MD).

Key Material Features: This material is beneficial in applications requiring improved sliding, lower friction, increased surface hardness, abrasion resistance, wear resistance, and dimensional stability compared to unfilled cast nylon.

Other Considerations: The MD filler makes the material more crystalline and as a result enhances the materials physical properties compared to other nylons. It is fitting in applications where surface hardness and self-lubrication are required. Cast nylons are often used as wear parts. The properties of the materials often make them beneficial alternatives to steel and bronze parts.


Property Value Typical ASTM Test
Chemical Designation (PA-6) Cast Polyamide
Trade Names (®, ™) Sustamid MD, Nylatron GSM, Tecast, Nycast 6PA MD, Unipa
Filler Molybdenum disulfide
Color Grey
Density (g/cm^3) 1.16 D 792


Property Value Typical ASTM Test
Modulus of Elasticity (Tensile Test) (psi) 400000 D 638
Tensile Strength at Yield (psi) 11500 D 638
Tensile Strength at Break (psi) 11900 D 638
Elongation at Yield (%) 3.3 D 638
Elongation at Break (%) 38 D 638
Flexural Strength (psi) 16500 D 790
Modulus of Elasticity (Flexural Test) (psi) 460000 D 790
Compression Strength: 10% Strain (psi) 15250 D 695
Compression Strength: 1% Strain (psi) 3700 D 695
Compression Modulus (psi) 375000 D 695
Impact Strength (Izod) (ft-lbs/in) 1.9 D 256
Hardness (R) 115 D 785
Hardness (D) 82 D 785
Coefficient of Friction (Kinetic, 40 psi, 50 fpm) 0.22 D 3702


Property Value Typical ASTM Test
Melting Point (°F) 430 D 3418
Deflection Temperature (°F) (66 psi) 350 D 648
Deflection Temperature (°F) (264 psi) 250 D 648
Service Temperature Continuous (°F) 230
Service Temperature Intermittent (°F) 330
Thermal Expansion (CLTE) (in/in/°F) 4.50E-5 D 696
Thermal Conductivity (BTU-in/hr-ft^2-°F) 2.29
Specific Heat (BTU/lb-°F) 0.68


Property Value Typical ASTM Test
Specific Surface Resistance (Ω/square) 1.00E14 D 257
Volume Resistivity (Ω*cm) 1.00E15 D 257
Dielectric Strength (V/mil) 550 D 149
Dielectric Constant (1MHz) 3.7 D 150
Dielectric Constant (60 Hz and 50% RH) 3.7 D 150


Property Value Typical ASTM Test
Moisture Absorption (%) (24 Hours) 0.55 D 570
Moisture Absorption (%) (Saturated) 5 D 570
The data stated are typical values intended for reference and comparison purposes only. The data should not be used as a basis for design specifications or quality control. The information is provided as a guide to the best of our knowledge and given without obligation or liability. Testing under individual application circumstances is recommended.