The invention discloses a cupboard which comprises a metal frame made of alloy material treated by tempering. The alloy material is composed of 1-2% of B, 2.1% of Si, 3.2% of Be, 1.2% of Bi, 0.7% of Mg, 0.9% of Ra and the balance being Cu and inevitable impurity. The tempering treatment to the alloy material includes the steps of (1), subjecting the alloy material to the first tempering at the temperature of 500 DEG C for 6 hours and then cooling the same in air to room temperature; (2), subjecting the alloy material to the second tempering at the temperature of 550 DEG C for 5 hours and then cooling the same in air to the room temperature; and (3), subjecting the alloy material to the third tempering at the temperature of 600 DEG C for 4 hours and then cooling the same in air to the room temperature. The metal frame for the cupboard is light, anticorrosive, antifriction and antioxidative and is of high strength, good weather resistance and long service life.