According to the regulations of my country's heavy machinery industry, all free forgings weighing more than 1000 tons produced by forging hydraulic presses can be called large forgings. According to the forging capacity of free forging hydraulic presses, it is roughly equivalent to: shaft forgings weighing more than 5 tons and disc forgings weighing more than 2 tons.

Large forgings are the main basic parts of various large and key equipment and devices required for national economic construction, national defense industry and modern scientific development.

Large forgings are mainly used in the following aspects:

1. Working rollers, support rollers and large transmission parts of rolling equipment.

2. Forging equipment modules, hammer rods, hammer heads, pistons, columns, etc.

3. Large transmission parts of mining equipment and parts of large lifting equipment.

4. Steam turbines, generator rotors, impellers, protective rings, large tube sheets, etc.

5. Hydropower equipment: large turbine shafts, main shafts, mirror plates, pressed large blades, etc.

6. Nuclear power generation equipment: reactor pressure shell, evaporator shell, regulator shell, steam turbine and generator rotor, etc.

7. Petrochemical equipment: large cylinders, heads, and tube sheets in petroleum hydrogenation reactors and ammonia synthesis towers.

8. Large crankshafts, intermediate shafts, rudders, etc. in the shipbuilding industry.

9. Military product manufacturing: large artillery barrels, aviation turbine discs, high-pressure cylinders, etc.

10. Key components in large scientific research equipment