... ) Material: Q195-Q235, Q345, 3) Standard: GB9787-1988 4) Grade: GB, ASTM, JIS, DIN mild steel equal angle and unequal angle steel ... angle standard sizes1) Material: Q195-Q235, Q345,2) Standard: GB9787-19883) Grade: GB ... and unequal angle. The kind which has two equal upright borders is equal angle, otherwise, if one border is longer and another ...