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35NCD16 Forgings

High-strength nickel-chromium-molybdenum alloy steel, equivalent to 36NiCrMo16 / 1.6773, forged to your drawing as rings, flanges, bars, disks, shafts and gears, with third-party EN 10204 certification.

Ni-Cr-Mo alloy steel AFNOR NF A35571 AIR 9160C aerospace EN 10204 3.1 / 3.2
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Quick specification

Grade
35NCD16
Standard
NF A35571 / AIR 9160C
Equivalent
36NiCrMo16 (1.6773)
Type
Ni-Cr-Mo alloy steel
Condition
N+T or Q+T
Forms
Rings, flanges, bars, disks, shafts

What is 35NCD16 steel?

35NCD16 is a French AFNOR high-strength nickel-chromium-molybdenum low-alloy steel, defined in standard NF A35571 (NFA 35552) and covered by the aerospace specification AIR 9160C. Its closest European equivalent is 36NiCrMo16, material number 1.6773. The grade combines high tensile strength and deep hardenability with good dimensional stability, which makes it well suited to large-section components and complex parts that carry high stress.

Jiangyin Jiangnan Metal Co., Ltd. supplies 35NCD16 as open-die and seamless-rolled forgings, machined to your drawing and delivered with a third-party inspection certificate. Below is the full technical datasheet, followed by product forms, applications and quality documentation.

  • DESIGNATION35NCD16 (AFNOR, France)
  • MATERIAL No.1.6773 (36NiCrMo16)
  • STEEL TYPELow-alloy Ni-Cr-Mo steel
  • KEY FEATUREHigh strength + deep hardenability
  • MELTING ROUTEEAF + LF + VD (ESR optional)
  • CERTIFICATIONEN 10204 3.1 / 3.2

Chemical composition of 35NCD16

Typical chemical composition of 35NCD16 alloy steel, in weight percent (%):

Element ranges per AFNOR NF A35571 / AIR 9160C. Balance is iron (Fe).
CSiMnP (max)S (max)CrMoNi
0.30–0.370.10–0.400.30–0.60 ≤ 0.030≤ 0.025 1.60–2.000.30–0.503.70–4.20

The high nickel content (about 4%) together with chromium and molybdenum is what gives 35NCD16 its combination of strength, toughness and hardenability.

Mechanical properties of 35NCD16

Mechanical properties depend on section size and heat-treatment condition. Typical values in the quenched-and-tempered (Q+T) condition are:

PropertyTypical value
Tensile strength (Rm)1050–1380 MPa
Yield strength (Rp0.2)≥ 900 MPa
Elongation (A)≥ 12 % (typical)
Modulus of elasticity (E)about 205 GPa
Delivery hardnessPer order, from annealed to hardened and tempered

Values are typical and given for guidance. Guaranteed properties are agreed per order and verified on the test certificate against the governing specification and section size.

35NCD16 equivalent grades and specifications

Standard / regionDesignation
France, AFNOR35NCD16 (NF A35571 / NFA 35552)
Germany / EU, DIN, EN36NiCrMo16, 1.6773
AerospaceAIR 9160C, AIR 9161, AIR 0819
International, AICMAFE-PL 76

35NCD16 has a higher nickel content than 34CrNiMo6 (1.6582 / AISI 4340), so those are related but not interchangeable grades. Confirm equivalence against the controlling specification for your application.

Heat treatment

We heat-treat 35NCD16 forgings to the condition your application requires. Typical guideline routes are:

AnnealingAbout 680 °C, slow cooling, for machinability and stress relief.
NormalizingAbout 875 °C, air cool, to refine grain structure.
HardeningAustenitize about 875 °C, then quench, for deep hardenability.
TemperingTempered to the target strength; optional sub-zero stage for extra strength.

35NCD16 product forms we forge

From a single billet to production quantities, Jiangnan Metal produces the following 35NCD16 forgings to drawing:

Forged and rolled ringsSeamless rolled rings and forged rings for bearings, gears and flanged joints.
Forged flangesWeld-neck, blind and custom flanges for pressure and structural service.
Round bars and blanksForged round bar, step shafts and rough-turned blanks.
Disks and discsSolid and bored forged disks for gears, wheels and covers.
Shafts and spindlesStraight, stepped and eccentric shafts for power transmission.
Sleeves, bushings and blocksHollow forgings, sleeves, bushings, valve bodies and blocks.

Applications of 35NCD16 forgings

Because 35NCD16 pairs very high strength with good toughness and dimensional stability, it is chosen for demanding, safety-critical parts:

Aerospace
Landing-gear components, high-strength bolts and fasteners, and structural parts subject to high stress.
Power and turbines
Gears, gearbox components, turbine and compressor shafts, and transmission spindles.
Oil, gas and subsea
Heavy-duty shafts, wellhead and pressure components for onshore and offshore systems.
Heavy machinery
Large-section machine parts, rolls, crankshafts and mill components.
Tooling and dies
Moulds for plastics and bolsters for drop stamps where high strength is needed.

Testing and certification

Every 35NCD16 order is produced under a controlled process and documented so you can trace and accept the material with confidence:

Ultrasonic testingTo EN 10228-3, SEP 1921 or ASTM A388 as specified.
Chemical and mechanical testsSpectro analysis plus tensile, hardness and impact testing.
Inspection certificateEN 10204 3.1, or 3.2 with third-party witness.
Heat-treatment recordsFurnace charts and condition traceable to the heat number.

Why buy 35NCD16 from Jiangyin Jiangnan Metal

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging manufacturer based in Jiangyin, Jiangsu, China. We forge alloy steels, stainless steels, tool steels and nickel alloys, including 35NCD16 / 36NiCrMo16, as rings, flanges, bars, disks, shafts and gears for customers in aerospace, energy, oil and gas and heavy machinery worldwide.

Send us the size or a drawing of the 35NCD16 forging you need and our engineers will quote the best price, lead time and applicable certification for your project.

Get a 35NCD16 quote

Email your drawing or dimensions and we reply within one business day.

Email sales@steelforgepieces.com

35NCD16 frequently asked questions

What is 35NCD16 steel?
35NCD16 is a French AFNOR high-strength nickel-chromium-molybdenum low-alloy steel (standard NF A35571; aerospace spec AIR 9160C). It combines high strength and hardenability with good dimensional stability and is used for aerospace structural parts and heavy-duty machine components.
What is the equivalent grade of 35NCD16?
The closest European equivalent is 36NiCrMo16, material number 1.6773 (DIN / EN). It is also covered by aerospace specifications AIR 9160C, AIR 9161 and AIR 0819, and by the AICMA designation FE-PL 76.
What is the chemical composition of 35NCD16?
Typical composition is C 0.30–0.37%, Si 0.10–0.40%, Mn 0.30–0.60%, Cr 1.60–2.00%, Mo 0.30–0.50%, Ni 3.70–4.20%, with P max 0.030% and S max 0.025% (balance iron).
What are the mechanical properties of 35NCD16?
In the quenched-and-tempered condition, typical values are tensile strength 1050–1380 MPa, yield strength at least 900 MPa, elongation about 12%, and modulus of elasticity around 205 GPa. Actual values depend on section size and are confirmed on the test certificate.
What are 35NCD16 forgings used for?
Aerospace landing gear, high-strength bolts and fasteners, structural parts, gears, heavy-duty shafts, large-section machine parts, and dies or moulds subject to high stress.
In what forms can you supply 35NCD16?
Forged rings, seamless rolled rings, flanges, round bars, disks and discs, shafts, gears, sleeves, bushings and blocks, machined to drawing, with EN 10204 3.1 or 3.2 certificates. Send your size or drawing for a quote.