In high-manganese aluminium bronze

there are micro-inclusions such as alundum

mullite and spinel; and micro-inclusions such as Al2O3

MnS FeS and FeO MnO. Different filtrating mediums have been used in purifying process

including corundum spheres and alumina bricks. The results show that the filtration process provides an excellent effect on eliminating inclusions in the molten metal. Fatigue strength of the material can be raised by 41.8% and elongation by 9. 7% ; while tensile strength can slightly be improved.