For more than 30 years, Aubert & Duval has been a leader in the most demanding marine and submarine forging applications. Our reputation has gained partnerships and valued customers, including DCNS, Areva/Technicatome, CEA, Rolls-Royce Marine, BAE Systems, Babcock International and Navantia.

Aubert & Duval follows the most stringent requirements in terms of grade composition, microstructural integrity, dimensional tolerances and quality control. Our products comply with multiple military standards.

Aubert & Duval marine forgings offering

Aubert & Duval can supply marine forging materials for submarine industry, drawing on its long history in shipbuilding.


To meet specific requests for critical naval forgings parts for the marine and submarine industry, Aubert & Duval offers an extensive product range. It provides the optimum compromise between mechanical properties (yield strength, fatigue) and resistance to localized corrosion (pitting and crevice corrosion) when required.


When the helicopter lands it is fastened to the marine rolled grid, keeping it secure in a deep sea environment.The following processes are available within Aubert & Duval or its qualified subcontractors:


  • Steelmaking for any special, stainless steel or superalloy: EAF + AOD, VIM, gas-atomization powder + hipping.
  • ESR or VAR remelting
  • Open die forging (parts up to 30 tons)
  • Closed die forging up to 8 tons (with presses from 4,800 to 65,000 tons)
  • Rolling of bars, sheets and plates
  • Heat treatment for up to 21 meter-long forged parts (e.g. shafts and tubes)
  • Machining up to 20 meters

Naval forging applications

  • Marine forgings for: launch torpedo tubes, spindles, rods,
  • Marine forgings for: shafts, sleeves, manholes, pump elbows,
  • Marine forgings for: blocks, rings, flanges, nozzles, filters,
  • Marine forgings for: caps, covers, helicopter landing grids, shells,
  • Marine forgings for: steering gears, press main shafts., etc.

Shipbuilding forging grades

Material Grade Type Applications
Alloyed steels 18MnD5 A508 Gr3 Pump elbow
Alloyed steels 80HLES 12NiCrMoV18 Structural forgings
Alloyed steels 100HLES X10NiMoCrV6 Structural forgings
Stainless steels 316L 1.4404 Shafts for water-jet turbines
Austenitic stainless steels URANUS C1 1.3964 Non-magnetic shafts
Austenitic stainless steels X18MnBZ AISI 347 Structural forgings
Super-austenitic stainless steel NYB66® S31266 Sea water circuit, cups, pistons,
Martensitic stainless steels APX® 4 X4CrNiMo16-5-1 Periscope masts, landing grids
Precipitation-hardened steels MARVALX®12H X1CrNiMoAlTi12-10-2 Helicopter/UAV, landing grids
Precipitation-hardened steels X13VD X12CrNiMoV12 Landing grids
Maraging steels MARVAL®18 Maraging 250 Motor cases, cups, sheets
Titanium alloys Ti6Al4V
Ti 40
Forged parts for pump or valve bodies, flanges, condensers, etc.
Superalloys Inco 625 Flanges, fittings valves, forging for sea water circuits


Aubert & Duval offers many other marine forging grades for the navy market: HY80, HY100, AISI 304L, AISI 347 AISI 316LN, AISI 316LN, AISI 316Nb, URANUS 47N, URANUS 47N+, URANUS 52N, URANUS 52N+, URANUS C1, URANUS C2 (XM19)…

Metal powders for additive manufacturing

Aubert & Duval can provide metal powders for 3D-printed manufacturing parts for marine applications,

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For specific grades, dimensions or applications contact us

See Also


Austenitic stainless steels


Stainless steels with structural hardening


Martensitic stainless steels


Maraging steels


Martensitic stainless steels