The forming process of large-scale tyre, casting instead of forging by using large-scale forging and ring rolling equipment was introduced, and the chemical composition of forging steel and heat treatment process of the tyre was optimized. Test results showed that the overall mechanical properties of the large-scale forged tyre, included the body tensile properties, could fully meet the technical requirements of customers, and the impact performance of the tyre at room temperature and 

-20 ℃, were far better than the technical requirements of German Standard DIN 17205.