Application fields of 30CrMnSi steel

30CrMnSi steel is a widely used steel grade for the manufacture of important parts, such as blades and valve plates of high-pressure blowers, high-speed and high-load grinding wheel shafts, gears, sprockets, shafts, clutches, bolts, nuts, etc.

30CrMnSi steel is still widely used in aircraft structures, such as the manufacture of wing girders, engine mounts, landing gears, shock absorbers, important bolts and some parts on aero-engines. Many steel parts on aircraft are used This steel is manufactured.

The reason why this kind of steel is widely used is firstly because it does not contain the rare element nickel and has good mechanical properties and is cheap; secondly because it has good weldability, which is also good for many welded components on aircraft. Invaluable performance.

Although the hardenability of 30CrMnSi steel is not high (the hardenability in oil does not exceed 30~40mm), this problem is not acute because there are not many parts with large cross-sections on the aircraft. The impact toughness of this kind of steel is relatively low, but for the general aircraft structure, it is not required to transmit huge loads in high-speed operation, so the impact toughness can be lower.

30CrMnSi steel can be made into plates, pipes, profiles, and bars for use in aviation factories, and is supplied as high-grade high-quality steel 30CrMnSiA. When making important parts for aviation use, 30CrMnSiA steel should be smelted by electric furnace plus electroslag remelting or vacuum smelting.