Steel 12NC12

13NiCr12 - AIR 9160 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.

Carbon 0.135%
Silicon 0.225%
Manganese 0.475%
Phosphorus 0.15%
Sulfur 0.125%
Chromium 0.75%
Nickel 3%

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Standards
Dimensions

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
Si
Silicon
Mn
Manganese
P
Phosphorus
S
Sulfur
Cr
Chromium
Ni
Nickel
Min. 0.11 0.10 0.35 >0 >0 0.60 2.75
Max. 0.16 0.35 0.60 0.30 0.25 0.90 3.25
Density

Density

7,8 kg/dm³

Ductility

Ductility

(A%) 19%

Impact Toughness

Impact Toughness

(KCU) 150 J/cm²

Yield Strength

Yield Strength

(Rp0.2%) Up to 700 MPa

How 12NC12 is used in aerospace

The practical applications of this steel in aircraft construction.

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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.

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The information in this technical data sheet is indicative and may be changed without notice. The values given are typical and not guaranteed. Paris-St-Denis-Aero disclaims any responsibility for product choices or the consequences of those choices.
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