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Chartes
- Métal - Coefficient for static friction of steel |
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| Materials
and Material Combinations |
Coefficient
of Friction |
| Clean |
Lubricated |
| Steel |
0.8 |
0.16 |
| Copper-lead
alloy |
0.22 |
- |
| Phosphor-bronze |
0.35 |
- |
| Aluminum-bronze |
0.45 |
- |
| Brass |
0.35 |
0.19 |
| Cast
iron |
0.4 |
0.21 |
| Bronze |
- |
0.16 |
| Sintered
bronze |
- |
0.13 |
| Hard
carbon |
0.14 |
0.11-0.14 |
| Graphite |
0.1 |
0.1 |
| Tungsten
carbide |
0.4-0.6 |
0.1-0.2 |
| Plexiglas |
0.4-0.5 |
0.4-0.5 |
| Polystyrene |
0.3-0.35 |
0.3-0.35 |
| Polythene |
0.2 |
0.2 |
| Teflon |
0.04 |
0.04 |
| Aluminum-aluminum |
1.35 |
0.3 |
| Cadmium-cadmium |
0.5 |
0.05 |
| Chromium-chromium |
0.41 |
0.34 |
| Copper-copper |
1 |
0.08 |
| Iron-iron |
1 |
0.15-0.20 |
| Magnesium-magnesium |
0.6 |
0.08 |
| Nickel-nickel |
0.7 |
0.28 |
| Platinum-platinum |
1.2 |
0.25 |
| Silver-silver |
1.4 |
0.55 |
| Zinc-zinc |
0.6 |
0.04 |
| Glass-glass |
0.9-1.0 |
0.1-0.6 |
| Glass-metal |
0.5-0.7 |
0.2-0.3 |
| Diamond-diamond |
0.1 |
0.05-0.1 |
| Diamond-metal |
0.1-0.15 |
0.1 |
| Sapphire-sapphire |
0.2 |
0.2 |
| Hard
carbon on carbon |
0.16 |
0.12-0.14 |
| Graphite-graphite
(in vacuum) |
0.5-0.8 |
- |
| Graphite-graphite |
0.1 |
0.1 |
| Tungsten
carbide-tungsten carbide |
0.2-0.25 |
0.12 |
| Plexiglas-plexiglas |
0.8 |
0.8 |
| Polystyrene-polystyrene |
0.5 |
0.5 |
| Teflon-Teflon |
0.04 |
0.04 |
| Nylon-nylon |
0.15-0.25 |
- |
| Solids
on rubber |
1-4 |
- |
| Wood
on wood (clean) |
0.25-0.5 |
- |
| Wood
on wood (wet) |
0.2 |
- |
| Wood
on metals (clean) |
0.2-0.6 |
- |
| Wood
on metals (wet) |
0.2 |
- |
| Brick
on wood |
0.6 |
- |
| Leather
on wood |
0.3-0.4 |
- |
| Leather
on metal (clean) |
0.6 |
- |
| Leather
on metal (wet) |
0.4 |
- |
| Leather
on metal (greasy) |
0.2 |
- |
| Brake
material on cast iron |
0.4 |
- |
| Brake
material on cast iron (wet) |
0.2 |
- |
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