Steel 12NC12
FE-PL61
Primarily composed of nickel and chromium, 12NC12 steel is used in aviation for components subjected to variable loads and constant friction. Thanks to its good wear resistance (or abrasion resistance), this alloy ensures the durability and performance of certain parts.
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A Wear-resistant steel
12NC12 steel (or 13Nicr 12) is commonly used in aviation for parts that need to withstand variable loads while being subjected to friction. These parts must therefore ensure good wear resistance, also known as abrasion resistance. The 12NC12 alloy in its carburized form has a hardened upper layer that makes it suitable for this type of use. In its non-carburized form, it is used for mechanical parts that do not particularly require wear resistance related to abrasion.
Chemical composition of 12NC12
The variations in its chemical composition for aerospace.
| % | C Carbon | Cr Chromium | Mn Manganese | Ni Nickel | P Phosphorus | S Sulfur | Si Silicon |
|---|---|---|---|---|---|---|---|
| Min. | 0.10 | 0.60 | 0.35 | 2.75 | <0.00 | <0.00 | 0.15 |
| Max. | 0.16 | 0.90 | 0.65 | 3.25 | 0.025 | 0.02 | 0.40 |
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Key properties
The most remarkable properties of this steel alloy
Tensile Strength
830-1230 MPa
Impact Toughness
≥700 kJ/m²
Yield Strength
≥630 MPa
Brinell Hardness
≤217
How 12NC12 is used in aerospace
The practical applications of this steel in aircraft construction.
Axles
The 12NC12 alloy is used in the composition of certain airplane parts, such as axles. These axles support and transmit loads between the wheels and the structure of the aircraft: landing gear axles, wheel axles, or differential axles.
Landing Gear
In the landing gear itself, 12NC12 steel is also used for the rack. Located near the hydraulic actuators, this gear mechanism allows the landing gear of an airplane to be deployed or retracted.
Drive Shaft
In helicopters and some propeller-driven airplanes, the drive shaft connects the engine to the propeller(s): it passes through the firewall to reach the cabin. 12NC12 alloy provides it with good friction resistance.
Optimizing the use of 12NC12 : treatments, regulations, and options.
Applications of
12NC12 steel
How it is used in various industries.
