- ahmad alhayek

$2.62 In a disk test performed on a specimen 25 mm in diameter and 6 mm thick, the specimen fractures at a stress of 275 MPa. What was the load on it? 2.63 A piece of steel has a hardness of 300 HB. Calculate its tensile strength, in MPa 2.69 The design speci_cation for a metal requires a minimum hardness of 80 HRA If a Rockwell test is performed and the depth of penetration is 60_m, is the material acceptable?$