Cast Nylon MD
Overview
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.
Physical
| 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 |
Mechanical
| 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 |
Thermal
| 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 |
Electrical
| 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 |
Other
| 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.