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A super-austenitic nickel-chromium-molybdenum-nitrogen stainless steel, AL6-XN® has outstanding corrosion resistant in a wide range of applications.

With many years of proven seawater service and 50% higher strength than stainless steel, AL6-XN® is the alloy of choice in high chloride, seawater and brine applications.


Product Form Size Range From Size Range To
AL6-XN® sheet & plate 0.6 mm 82.6 mm
AL6-XN® pipe 0.5 in 16 in
AL6-XN® round bar 9.5 mm 203.2 mm
AL6-XN® coil - 1 mm
AL6-XN® pipe fittings - 1 mm

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Pipe Fittings

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Sheet & Plate

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Round Bar

Chemical Analysis

% Cr Ni Mo C N Mn Si P S Cu Fe
MIN 20.00 23.50 6 - 0.18 - - - - - -
MAX 22.00 25.50 7 0.03 0.25 2 1 0.04 0.03 0.75 Balance


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Ideal for applications in the Oil & Gas industry

AL6-XN® can be used in a variety of applications, here are just a few examples:

  • FGD scrubbers
  • Reverse osmosis desalination
  • Distillation columns
  • Heat exchangers
  • Biopharm tanks and fermenters
  • Pressure vessels
  • Manways
  • Agitators and mixers
  • Seawater coolers in nuclear plants

About AL6-XN®

AL6-XN® (UNS N08367) is a 6% molybdenum, low carbon, nitrogen-bearing super-austenitic stainless alloy. The alloy was originally designed for seawater applications. AL6-XN® has also been successfully used in a broad range of very corrosive environments including the rapidly developing biopharm markets.

The high strength and corrosion resistance of the AL6-XN® alloy make it a better choice than the conventional duplex stainless steels and a cost effective alternative to more expensive nickel-base alloys where excellent formability, weldability, strength and corrosion resistance are essential.


8.055 g/cm³
Melting Point:
Electrical Resistivity:
8.89 x 10^ -7 Ω⋅m


UNS Number:
ASTM A182, A240,A249, A276, A312, A479, B462, B472, B564, B675, B676, B688, B690, B691, B366, B804
Download the AL6-XN® Data Sheet Download

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