ASTM D 522/D 522M - 13. Standard Test Methods for Mandrel Bend Test of Attached Organic Coatings

American Society for Testing and Materials (ASTM). Current edition approved Nov. 1, 2013. Published December 2013. Originally approved in 1939. Last previous edition approved in 2008 as D522 – 93a (2008). 4 p.
These test methods cover the determination of the resistance to cracking (flexibility) of attached organic coatings on substrates of sheet metal or rubber-type materials.
The coating materials under test are applied at uniform thickness to panels of sheet metal or rubber-type materials. After drying or curing the coated panels are bent over a mandrel and the resistance to cracking of the coating is determined. In Test Method A the coated panels are bent over a conical mandrel. In Test Method B the coated panels are bent over cylindrical mandrels of various diameters.