Steel 35NCD16

30NiCrMo16 - 1.6747 - 34NiCrMo16

35NCD16 is a high-strength, low-alloy steel known for its excellent mechanical properties: high tensile strength, good toughness, and excellent resistance to wear and fatigue. Its ability to maintain mechanical integrity under high stress makes it an ideal choice for applications requiring both strength and durability.

Available shapes :

Carbon 0.35%
Silicon 0.275%
Manganese 0.45%
Sulfur 0.01%
Phosphorus 0.0125%
Chromium 1.8%
Nickel 3.85%
Molybdenum 0.425%

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A famous steel, known for its resistance

35NCD16, or 1.6747, is a high-strength low-alloy steel renowned for its exceptional toughness and dimensional stability. This nickel-chromium-molybdenum steel is utilized in aerospace, automotive, and industrial machinery due to its robust mechanical properties, such as tensile strength (1050-1380 MPa) and yield strength of at least 900 MPa. Its composition, which includes a high percentage of nickel and chromium, contributes to its remarkable strength. Heat treatments such as quenching and tempering further enhance its performance, making it ideal for high-stress components like landing gear, gears, and heavy-duty shafts.

These mechanical properties and more make 35NCD16 an optimal choice for applications requiring high performance and reliability in aerospace. It was even used for certain parts of the famous Concorde!

Chemical composition of 35NCD16

The variations in its chemical composition for aerospace.

% C
Min. 0.30 0.15 0.30 >0 >0 1.60 3.50 0.25
Max. 0.40 0.40 0.60 0.02 0.025 2.00 4.20 0.60
Impact Toughness

Impact Toughness

(KCU) 150 J/cm²

Tensile Strength

Tensile Strength

1050 N/mm² (Rm)

Yield Strength

Yield Strength

900 N/mm² (Re)

Brinell Hardness

Brinell Hardness

285 (HB)

How 35NCD16 is used in aerospace

The practical applications of this steel in aircraft construction.



The 35NCD16 steel alloy is used in the wings, more specifically in the leading edge slat tracks. These allow the slats to extend and retract to facilitate takeoff and landing phases.

Landing Gear

Particularly suited for this use, the 35NCD16 finds its place in the strut and its sliding rod. These two parts work together to absorb shocks during landing. It was even chosen for the Concorde’s landing gear!


Such small elements as screws and bolts play a crucial part in the safety of airplanes. The excellent properties of the 35NCD16 meet this need for resistance to deformations : it is widely used in aerospace structures.

Optimizing the use of 35NCD16 : 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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