SAE J 200 Codes BG
Relative Cost Medium-high
40°~80°C Special Compound -55°~100°C
40°~176°F Special Compound -67°~212°F
For high hydrualic pressure
Highly stressed parts subject to wear
Performs Well in…
Petroleum based oils and fuels
Silicone oils and greases
Dilute acids, base and salt solutions to moderate temperatures
Water and steam to 150°C (300°F)
Doesn’t Perform Well in…
Polar solvents (ketones, ethers, esters)
Millable Polyurethane are distinguished into two types: polyester urethane (AU) and polyesther urethane (EU).
Millable polyurethane offers superior seal performance in hydraulic situations, where high pressure, shock load, or abrasive contamination is anticipated. It provides outstanding resistance to abrasion and tear and has the highest available tensile strength among all elastomers while providing good elongation
Excellent strength and abrasion resistance
Good resistance to petroleum oils
Good weather resistance
Unless specifically compounded, at elevated temperatures millable
polyurethane begins to soften, losing its physical strength and chemical
resistance advantages over other polymers.
Certain types of AU are sensitive to water and humidity and could be easily
hydrolyzed. EU offers better resistance to water and humidity.