\brә-▐nel-\ n [Johann A. Brinell † Swedish engineer] (1915) The hardness of a material as determined by pressing a hardened steel or carbide ball, 10 mm in diameter, into the specimen under a fixed load. The Brinell number is the load in kilograms divided by the area in mm2 of the spherical impression formed by the ball. For nonferrous materials, the prescribed load is 500 kg applied for 30 seconds. The Brinell test is used mostly for ductile metals, for which the Brinell number is related to yield strength in a simple way. Also known as Brinell Hardness Number. (Shah V (1998) Handbook of plastics testing technology. Wiley, New York).