Marginally lubricated

3 Properties3 Properties3.1 Physical PropertiesPhysicalPropertiesCharacteristic Symbol Value DX Unit CommentsThermal Conductivity λ 52 W/mKCoefficient of linear thermal expansion :parallel to surface α 1 11 1/10 6 Knormal to surface α 2 29 1/10 6 KMechanicalPropertiesMaximum Operating Temperature T max 120 °CMinimum Operating Temperature T min –40 °CCompressive Yield Strength σ c 380 N/mm 2 measured on disc 5 mm diameterx 2.45 mm thick.Maximum LoadStatic p sta,max 140 N/mm 2Dynamic p dyn,max 140 N/mm 2ElectricalPropertiesVolume resistivity of acetal lining 10 15 ΩcmTable 1: Properties of DX3.2 Chemical PropertiesThe following table provides an indicationof the resistance of DX to various chemicalmedia. It is recommended thatthe chemical resistance is confirmed bytesting if possiple.+o-Satisfactory:Corrosion damage is unlikelyto occur.Acceptable:Some corrosion damage mayoccur but this will not be sufficientto impair either thestructural integrity or the tribologicalperformance of thematerial.Unsatisfactory:Corrosion damage will occurand is likely to affect either thestructural integrity and/or thetribological performance of thematerial.Chemical % °C RatingStrong Acids Hydrochloric Acid 5 20 -Nitric Acid 5 20 -Sulphuric Acid 5 20 -Weak Acids Acetic Acid 5 20 -Formic Acid 5 20 -Bases Ammonia 10 20 oSodium Hydroxide 5 20 oSolvents Acetone 20 +Carbon Tetrachloride 20 +Lubricants and fuels Paraffin 20 +Gasolene 20 +Kerosene 20 +Diesel fuel 20 +Mineral Oil 70 oHFA-ISO46 High Water fluid 70 oHFC-Water-Glycol 70 oHFD-Phosphate Ester 70 +Water 20 oSea Water 20 -Table 2: Chemical resistance of DX6