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Alloy 347

Alloy 347 exhibits excellent resistance to intergranular corrosion.

Alloy 347 from NeoNickel offers superior resistance to intergranular corrosion. It’s also suitable for high temperature service, due to its good mechanical properties. Alloy 347 is now available from NeoNickel Hranice.


Product form Size range from Size range to
Alloy 347 welding wire 0.762mm 2.3622mm
Alloy 347 sheet & plate 0.508mm 101.6mm
Alloy 347 round bar 9.5mm 177.8mm
Alloy 347 coil 4.76mm -

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    Welding Consumables

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    Sheet & Plate

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    Round Bar

Chemical Analysis

% Cr Ni Cb+Ta C Si Mn P S Fe
Min 17 9 Cb10xc 0.04 - - - - -
Max 19 13 1 0.08 0.75 2 0.045 0.03 Balance


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Perfect for applications in the Thermal Processing industry

Alloy 347 can be used in a variety of applications including:

  • Oil Refineries
  • Fluid catalytic cracking units
  • Hanger rods
  • Recuperator tube sheets
  • Fired heater tubes
  • Equipment in and around reactors

About Alloy 347

Alloy 347 is generally used where corrosive conditions are severe, such as aircraft exhaust stacks, manifolds and ring collectors. Type 347 is also used for heavy welded assemblies which cannot be annealed after welding or where the operating conditions cause exposure within the temperature range between 426.67° to 815.55°F.


7.916 g/cm³
Electrical resistivity:
8.89 x 10^ -7 Ωm


UNS Number:
UNS S34700
AMS 5512, AMS 5646, AMS 5680
Download the Alloy 347 Data Sheet Download

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