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Material Contact Properties Table

The table below shows material types and their commonly used values for the dynamic coefficient of friction and restitution.
 
Material 1:
Material 2:
Mu static:
Mu dynamic:
Restitution Coefficient:
Dry steel
Dry steel
0.70
0.57
0.80
Greasy steel
Dry steel
0.23
0.16
0.90
Greasy steel
Greasy steel
0.23
0.16
0.90
Dry aluminium
Dry steel
0.70
0.50
0.85
Dry aluminium
Greasy steel
0.23
0.16
0.85
Dry aluminium
Dry aluminium
0.70
0.50
0.85
Greasy aluminium
Dry steel
0.30
0.20
0.85
Greasy aluminium
Greasy steel
0.23
0.16
0.85
Greasy aluminium
Dry aluminium
0.30
0.20
0.85
Greasy aluminium
Greasy aluminium
0.30
0.20
0.85
Acrylic
Dry steel
0.20
0.15
0.70
Acrylic
Greasy steel
0.20
0.15
0.70
Acrylic
Dry aluminium
0.20
0.15
0.70
Acrylic
Greasy aluminium
0.20
0.15
0.70
Acrylic
Acrylic
0.20
0.15
0.70
Nylon
Dry steel
0.10
0.06
0.70
Nylon
Greasy steel
0.10
0.06
0.70
Nylon
Dry aluminium
0.10
0.06
0.70
Nylon
Greasy aluminium
0.10
0.06
0.70
Nylon
Acrylic
0.10
0.06
0.65
Nylon
Nylon
0.10
0.06
0.70
Dry rubber
Dry Steel
0.80
0.76
0.95
Dry rubber
Greasy steel
0.80
0.76
0.95
Dry rubber
Dry aluminium
0.80
0.76
0.95
Dry rubber
Greasy aluminium
0.80
0.76
0.95
Dry rubber
Acrylic
0.80
0.76
0.95
Dry rubber
Nylon
0.80
0.76
0.95
Dry rubber
Dry rubber
0.80
0.76
0.95
Greasy rubber
Dry steel
0.63
0.56
0.95
Greasy rubber
Greasy steel
0.63
0.56
0.95
Greasy rubber
Dry aluminium
0.63
0.56
0.95
Greasy rubber
Greasy aluminium
0.63
0.56
0.95
Greasy rubber
Acrylic
0.63
0.56
0.95
Greasy rubber
Nylon
0.63
0.56
0.95
Greasy rubber
Dry rubber
0.63
0.56
0.95
Greasy rubber
Greasy rubber
0.63
0.56
0.95

References

The friction values used in the material interaction table are generalized values based on the following references:
■Bowden & Tabor, "The Friction and Lubrication of Solids," Oxford.
■Fuller, "Theory and Practice of Lubrication for Engineers," Wiley.
■Ham & Crane, "Mechanics of Machinery," McGraw-Hill.
■Bevan, "Theory of Machines," Longmans.
■Shigley, "Mechanical Design," McGraw-Hill.
■Rabinowicz, "Friction and Wear of Materials," Wiley.