Home Stock Program F51/Duplex 2205

Duplex 2205 steel / AISI 318

Your specialist for Duplex 2205 steel / F51 sawn steel from forged billets directly from stock in Texas. We provide metal cutting services.
Duplex 2205 steel

The austenitic-ferritic chromium-nickel-molybdenum steel, F51 material / Duplex 2205, is rust and acid resistant. It is characterized by its good corrosion resistance to pitting and surface corrosion. Resistance to seawater is given.

Duplex 2205 magnetic stainless steel has high yield strength, molybdenum addition and low nickel content.
Its particular strength is resistance to stress corrosion.

International identifiers:

ASTM A182F51, SUS329J3L, STS329J3LTP, S31803, SS2377, Z3CND22-05Az, 1.4462, Duplex 2205, Alloy 2205


Duplex 2205 stainless steel is used in construction industry, shipbuilding, food industry, chemical industry, mechanical engineering, seawater desalination plants, offshore and for oil and gas industry. SS steel high pressure pumps.



Forgeability: medium
Welding suitability: good
Mechanical properties: excellent
Corrosion resistance: excellent

Forging: F51 duplex / AISI 318 must be heated slowly to 1200°C, as it reacts sensitively to thermal shock stresses. With subsequent rapid cooling in air or water, it can be forged in the temperature range between 1200°C – 900°C.

Welding: Weldability of Alloy 2205 is difficult. Working with unsuitable welding parameters can lead to poor results.

Corrosion resistance: Duplex 2205 has excellent corrosion resistance in acid environments, pitting corrosion and chloride-containing media. Against intergranular corrosion and stress corrosion cracking, this stainless steel is strongly superior to austenitic steel grades due to the duplex structure of austenite and ferrite.

Machining: F51 / AISI 318 is machinable only under difficult properties due to the two-phase structure. The machinability allows ideal cutting conditions and are in the smaller range than of austenites. Therefore, it is advisable to use cermet or coated carbide tips.

temperature in °C cooling
cold transformation 1.200 – 950 air
heat treatment
Desolventizing annealing (+AT) 1.020 – 1.100 water, air
Duplex AISI 318 Tensile strength Rm 680 to 880 Mpa

Processing Duplex / F51:

Polishability is possible
Cold working is possible
Machining is possible
Cold heading only possible under certain conditions
Open and closed die forging is possible

Chemical analysis:

F51 / AISI 318
C Si Mn P S Cr Mo Ni V Al Cu N Nb Ti
min. 21,0 2,5 4,5 0,10
max. 0,03 1,0 2,0 0,035 0,02 23,0 3,5 6,5 0,22

We deliver from stock:

flat, forged, pre-machined

acero plano, forjado, recocide disolución y curado

Advantages of saw cut:

The use of a saw for processing involves mechanical manipulation of the material, resulting in a reduced risk of unintended deformation and increased hardness compared to thermal cutting methods. As a result, the workpiece maintains a consistent structure, allowing for seamless continuation of material processing. This characteristic enables immediate finishing touches through milling or drilling without the need for pre-annealing or similar procedures.

  • Produced to highest standards

Produced to highest standards
  • Quick delivery

Quick delivery from US
  • From stock in Texas

Steel from stock in Texas

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