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Friction Coefficients: Steel
Cast iron slightly lubricated 485psi to Graphite Clean and Dry
Static and kinetic friction coefficients between material pairs under various surface conditions
| material 1 | material 2 condition | material 2 | mu kinetic max (dimensionless) | mu kinetic min (dimensionless) | mu static max (dimensionless) | mu static min (dimensionless) | pressure psi (psi) | standard | surface condition |
|---|---|---|---|---|---|---|---|---|---|
| Steel | Cast iron slightly lubricated 485psi | Cast iron | 0.36 | 0.36 | — | — | 485 | Machinery's Handbook (Oberg et al.) | slightly lubricated |
| Steel | Cast iron slightly lubricated 525psi | Cast iron | 0.35 | 0.35 | — | — | 525 | Machinery's Handbook (Oberg et al.) | slightly lubricated |
| Steel | Cast iron slightly lubricated 565psi | Cast iron | 0.36 | 0.36 | — | — | 565 | Machinery's Handbook (Oberg et al.) | slightly lubricated |
| Steel | Cast iron slightly lubricated 600psi | Cast iron | 0.36 | 0.36 | — | — | 600 | Machinery's Handbook (Oberg et al.) | slightly lubricated |
| Steel | Cast iron slightly lubricated 635psi | Cast iron | 0.37 | 0.37 | — | — | 635 | Machinery's Handbook (Oberg et al.) | slightly lubricated |
| Steel | Cast iron slightly lubricated 670psi | Cast iron | 0.4 | 0.4 | — | — | 670 | Machinery's Handbook (Oberg et al.) | slightly lubricated |
| Steel | Cast iron slightly lubricated 710psi | Cast iron | — | — | — | — | 710 | Machinery's Handbook (Oberg et al.) | slightly lubricated |
| Steel | Cu ASM unlubricated | Cu | 0.8 | 0.8 | — | — | — | — | Unlubricated, room temperature, ambient air |
| Steel | Cu film on steel ASM unlubricated | Cu film on steel | — | — | 0.3 | 0.3 | — | — | Unlubricated, room temperature, ambient air |
| Steel | Graphite Clean and Dry | Graphite | — | — | 0.1 | 0.1 | — | — | Clean and Dry |
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