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Alloy 400

A nickel-copper grade, Alloy 400 combines high strength and corrosion resistance.

Superb corrosion resistance in a wide range of media including seawater, hydroflouric acid, fluorine, sulphuric acid and alkalis.


Product FormSize range fromSize range to
Alloy 400 round bar4.76 mm279 mm GET A QUOTE
Alloy 400 round tubing3.175 mm19.05 mm GET A QUOTE
Alloy 400 sheet & plate0.5 mm76.2 mm GET A QUOTE
Alloy 400 pipe0.25 in8 in GET A QUOTE
Alloy 400 pipe fittings0.25 in8 in GET A QUOTE
Alloy 400 flanges0.25 in8 in GET A QUOTE

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Pipe Fittings

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Sheet & Plate

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Chemical Analysis



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Perfect for applications in the Chemical Processing Industry

Alloy 400 can be used in a variety of applications, here are just a few examples:

  • Packed columns
  • Pressure vessels and reactors
  • Brine heaters
  • Heat exchangers
  • Salt production equipment
  • Pump and valve components
  • Pipe work and pipe spools

About Alloy 400

Alloy 400 from NeoNickel has superb corrosion resistance, particularly in neutral and alkaline salts. It is also one of a limited number of alloys that can be used in conjunction with hydrofluoric acid and fluorine. With high nickel content, this alloy is immune to chloride-induced stress corrosion cracking. The alloy also has good mechanical properties from sub-zero temperatures up to 549°C.

This alloy also performs excellently in seawater, with improved resistance to cavitation corrosion compared with other copper-base alloys. It’s often used to handle sulphuric acid up to 80% concentration at room temperature and up to 15% sulphuric acid at boiling temperatures.

Check out our Technical Resource: Burst Pressure Tables using Alloy 400 Seamless Tube.



8.80 g/cm³
Melting Range:
1300 - 1350 °C
60-80 HRB
Specific Heat Capacity:
427 J/kg.°C
Electrical Resistivity:
0.511 µΩ.m
Curie Temperature:
Poisson's Transus:


UNS Number:
ASTM B127, B163, B164, B165, B564, B725, B730, B366, AMS 4675, 4730, AMS 4544, 4731
Download the Alloy 400 Data Sheet Download

Request a Quote

Fill in our online form to get a fast quote. Got a technical question? Contact us on techsales@neonickel.com or for more general enquiries please email us at enquiries@neonickel.com