Friction Coefficient of Material
Extreme care is needed in using friction coefficients and additional independent references should be used. For any specific application the ideal method of determining the coefficient of friction is by trials.
Friction Coefficient of Material | |||||
|---|---|---|---|---|---|
| Material 1 | Material 2 | Coefficient of Friction | |||
| Dry | Greasy | ||||
| Static | Sliding | Static | Sliding | ||
| Aluminum | Aluminum | 1.05 - 1.35 | 1.4 | 0.3 | - |
| Aluminum | Mild Steel | 0.4 | - | - | - |
| Brake Material | Cast Iron | - | - | - | - |
| Brake Material | Cast Iron (wet) | 0.2 | - | - | - |
| Brass | Cast Iron | - | 0.3 | - | - |
| Brick | Wood | 0.6 | - | - | - |
| Bronze | Cast Iron | - | 0.22 | - | - |
| Bronze | Steel | - | - | 0.16 | - |
| Cadmium | Cadmium | 0.5 | - | 0.05 | - |
| Cadmium | Mild Steel | - | 0.46 | - | - |
| Cast Iron | Cast Iron | 1.1 | 0.15 | - | 0.07 |
| Cast Iron | Oak | - | 0.49 | - | 0.075 |
| Chromium | Chromium | 0.41 | - | 0.34 | - |
| Copper | Cast Iron | 1.05 | 0.29 | - | - |
| Copper | Copper | 1.0 | - | 0.08 | - |
| Copper | Mild Steel | 0.53 | 0.36 | - | 0.18 |
| Copper Lead Alloy | Steel | 0.22 | - | - | - |
| Diamond | Diamond | 0.1 | - | 0.05 - 0.1 | - |
| Diamond | Metal | 0.1 - 0.15 | - | 0.1 | - |
| Glass | Glass | 0.9 - 1.0 | 0.4 | 0.1 - 0.6 | 0.09 - 0.12 |
| Glass | Metal | 0.5 - 0.7 | - | 0.2 - 0.3 | - |
| Glass | Nickel | 0.78 | 0.56 | - | - |
| Graphite | Graphite | 0.1 | - | 0.1 | - |
| Graphite | Steel | 0.1 | - | 0.1 | - |
| Graphite (in vacuum) | Graphite (in vacuum) | 0.5 - 0.8 | - | - | - |
| Hard Carbon | Hard Carbon | 0.16 | - | 0.12 - 0.14 | - |
| Hard Carbon | Steel | 0.14 | - | 0.11 - 0.14 | - |
| Iron | Iron | 1.0 | - | 0.15 - 0.2 | - |
| Lead | Cast Iron | - | 0.43 | - | - |
| Leather | Wood | 0.3 - 0.4 | - | - | - |
| Leather | Metal (clean) | 0.6 | - | 0.2 | - |
| Leather | Metal (wet) | 0.4 | - | - | - |
| Leather | Oak (parallel grain) | 0.61 | 0.52 | - | - |
| Magnesium | Magnesium | 0.6 | - | 0.08 | - |
| Nickel | Nickel | 0.7-1.1 | 0.53 | 0.28 | 0.12 |
| Nickel | Mild Steel | - | 0.64 | - | 0.178 |
| Nylon | Nylon | 0.15 - 0.25 | - | - | - |
| Oak | Oak (parallel grain) | 0.62 | 0.48 | - | - |
| Oak | Oak (cross grain) | 0.54 | 0.32 | - | 0.072 |
| Platinum | Platinum | 1.2 | - | 0.25 | - |
| Plexiglas | Plexiglas | 0.8 | - | 0.8 | - |
| Plexiglas | Steel | 0.4 - 0.5 | - | 0.4 - 0.5 | - |
| Polystyrene | Polystyrene | 0.5 | - | 0.5 | - |
| Polystyrene | Steel | 0.3 - 0.35 | - | 0.3 - 0.35 | - |
| Polythene | Steel | 0.2 | - | 0.2 | - |
| Rubber | Asphalt (dry) | - | 0.5 - 0.8 | - | - |
| Rubber | Asphalt (wet) | - | 0.25 - 0.0.75 | - | - |
| Rubber | Concrete (dry) | - | 0.6 - 0.85 | - | - |
| Rubber | Concrete (wet) | - | 0.45 - 0.75 | - | - |
| Saphire | Saphire | 0.2 | - | 0.2 | - |
| Silver | Silver | 1.4 | - | 0.55 | - |
| Sintered Bronze | Steel | - | - | 0.13 | - |
| Solids | Rubber | 1.0 - 4.0 | - | - | - |
| Steel | Aluminium Bros | 0.45 | - | - | - |
| Steel | Brass | 0.35 | - | 0.19 | - |
| Steel (mild) | Brass | 0.51 | 0.44 | - | - |
| Steel (mild) | Cast Iron | - | 0.23 | 0.183 | 0.133 |
| Steel | Cast Iron | 0.4 | - | 0.21 | - |
| Steel | Copper Lead Alloy | 0.22 | - | 0.16 | 0.145 |
| Steel (hard) | Graphite | 0.21 | - | 0.09 | - |
| Steel | Graphite | 0.1 | - | 0.1 | - |
| Steel (mild) | Lead | 0.95 | 0.95 | 0.5 | 0.3 |
| Steel (mild) | Phos. Bros | - | 0.34 | - | 0.173 |
| Steel | Phos. Bros | 0.35 | - | - | - |
| Steel (hard) | Polythened | 0.2 | - | 0.2 | - |
| Steel (hard) | Polystyrene | 0.3-0.35 | - | 0.3 - 0.35 | - |
| Steel (mild) | Steel (mild) | 0.74 | 0.57 | - | 0.09 - 0.19 |
| Steel (hard) | Steel (hard) | 0.78 | 0.42 | 0.05 - 0.11 | 0.029 - .12 |
| Steel | Zinc (plated on steel) | 0.5 | 0.45 | - | - |
| Teflon | Steel | 0.04 | - | 0.04 | 0.04 |
| Teflon | Teflon | 0.04 | - | 0.04 | 0.04 |
| Tin | Cast Iron | - | .32 | - | - |
| Tungsten Carbide | Tungsten Carbide | 0.2 - 0.25 | - | 0.12 | - |
| Tungsten Carbide | Steel | 0.4 - 0.6 | - | 0.08 - 0.2 | - |
| Tungsten Carbide | Copper | 0.35 | - | - | - |
| Tungsten Carbide | Iron | 0.8 | - | - | - |
| Wood | Wood (clean) | 0.25 - 0.5 | - | - | - |
| Wood | Wood (Wet) | 0.2 | - | - | - |
| Wood | Metals (clean) | 0.2 - 0.6 | - | - | - |
| Wood | Metals (wet) | 0.2 | - | - | - |
| Wood | Brick | 0.6 | - | - | - |
| Wood | Concrete | 0.62 | - | - | - |
| Zinc | Zinc | 0.6 | 0.04 | - | - |
| Zinc | Cast Iron | 0.85 | 0.21 | - | - |
Tags: Coefficient Friction Tables