Friction Center Coefficient Database The table below gives static and kinetic friction coefficients for various combinations of materials. These values are for reference only and actual values will vary depending on the particular application conditions.
Friction Couple Conditions static coefficient kinetic coefficient
aluminum / aluminum oxidizing environment 1.9
aluminum / steel 0.61 0.47
automotive brake pad / cast iron humid environment 0.2 - 0.5
brick / brick 0.65
carbon composite / carbon composite inert environment 0.5 - 1.2
carbon composite / carbon composite humid environment 0.1 - 0.5
copper / copper inert environment 4.0
copper / copper oxidizing environment 1.6
copper / steel 0.53 0.36
cortical bone / cencellous bone saline lubrication 0.61
diamond / diamond clean 0.1
diamond / diamond lubricated 0.05 - 0.1
glass / glass clean 0.94 0.40
glass / glass lubricated 0.2 - 0.3
glass / metal clean 0.5 - 0.7
gold / gold inert environment 4.0
gold / gold humid environment 2.5
ice / ice 0.1 0 0.03
iron / iron oxidizing or humid environment 1.2
leather / metal 0.55
metal / metal lubricated 0.15 0.05
mica / mica clean, fresh cleave 1.0
mica / mica 0.2 - 0.4
nickel / nickel inert environment 5.0
nickel / nickel oxidizing environment 3.0
nickel / nickel humid environment 1.6
nylon / nylon clean 0.20
rubber / concrete varying 1.00 - 4.00 0.80
sapphire / saphire non-lubricated 0.2
sapphire / steel non-lubricated 0.15
Silver / Silver oxidizing or humid environment 1.5 steel / steel 0.74 0.57
synovial joints (humans) 0.01 0.003
teflon / teflon 0.04 0.04
tungsten carbide / graphite 0.62
wood / stone 0.40
wood / wood 0.25 - 0.5 0.20
CENTER FOR ADVANCED FRICTION STUDIES
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