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AL 6XN Description

A super-austenitic nickel-chromium-molybdenum-nitrogen stainless steel, AL-6XN® has outstanding corrosion resistance in a wide range of applications
AL-6XN® (UNS N08367) is a 6% molybdenum, low carbon, nitrogen-bearing super-austenitic stainless alloy. The alloy was originally designed for seawater applications. AL-6XN® 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 AL-6XN® 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.

AL-6XN® is the registered trademark of Allegheny Ludlum Corporation.

Chemical Composition %

% C Cr Ni Mo Cu P Mn Si S N
min 20 23.5 6 0.18
max 22 25.5 7 0.75 0.04 1 0.03 0.25

Mechanical & Physical Properties

0.2% Yield Strength Tensile Strength Elongation Modulus of Elasticity Density Melting Range
MPa MPa % GPa g/cm³ °C
393 770 44 195 8.06 1321-1393
  • COMMON TRADE NAMES
  • AL-6XN
  • UNS N08367
  • EN 1.4529 (nearest)
  • X1NiCrMoCuN 25-20-6
  • JIS NW8601

Specification

ASTM: A182, A240, A249, A276
ASTM A312, A479, B462, B472
ASTM B564, B675, B676, B688
ASTM B690, B691, B366, B804

Typical Applications

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

Welding consumables

AWS A5.4: E NiCrMo-3
AWS A5.14: ER NiCrMo-3

What Can We Offering

Available Product Range (in mm)

<ul>
<li class=”elementor-icon-box-title”><span style=”color: #3366ff;”>Hot-Rolled Steel Plates</span></li>
<li>Thickness: Ranging from 3mm to 120mm</li>
<li>Width: 600mm-2500mmStandard Width: 1000, 1219, 1500, and 2000mm</li>
<li>Length:1000mm-25000mm</li>
<li>Cut to Length: 2000 2440, 3000, 3048 and 6000mm</li>
<li>Surface Finish:  NO.1, NO.4, 2B,2D,BA,6K,8K, HL,Embossed</li>
<li class=”elementor-icon-box-title”><span style=”color: #3366ff;”>Cold-Rolled Steel Sheet/Plate</span></li>
<li>Thickness: Ranging from 0.2mm to 4mm</li>
<li>Width: 600mm-2000mm</li>
<li>Standard Width: 1000, 1219, 1500, and 2000mm</li>
<li>Length:1000mm-6000mm</li>
<li>Cut to Length: 2000 2440, 3000, 3048 and 6000mm</li>
<li>Form: Sheet Or Coil</li>
<li class=”elementor-icon-box-title”></li>
</ul>

Available Round Bar Dimensions (in mm)

<ul>
<li><span style=”color: #0000ff;”>Diameter</span></li>
<li>General Range: 3mm to 800mm</li>
<li>Common Range: 25mm to 152mm</li>
<li>Specialized: Up to 300mm or more for certain applications</li>
<li><span style=”color: #0000ff;”>Length</span></li>
<li>Standard: 1 to 6 meters</li>
<li>Custom: Available in custom cut lengths</li>
<li><span style=”color: #0000ff;”>Other dimensions</span></li>
<li>Forms: Available in various forms including round, square, hex, flat, billet, and ingot</li>
<li>Finishes: Common finishes include bright, polished, and black</li>
<li>Tolerance:±0.05 mm (cold-drawn), ±0.4 mm (hot-rolled)</li>
</ul>

Type Of Flangs (Size/Dimensions)

<ul>
<li><span style=”color: #0000ff;”>Welding Neck, Reducer Flange,</span><span style=”color: #0000ff;”>Socket Weld Flange</span></li>
<li>Dimensions:½” – 48″（DN15-DN1200）</li>
<li>Pressure Class:150# 300# 600#900#1500#</li>
<li>Facing Type:RF,FF,RTJ</li>
<li><span style=”color: #0000ff;”>Slip-On Flange,</span><span style=”color: #0000ff;”>Lap Joint Flange,</span><span style=”color: #0000ff;”>Threaded Flange</span></li>
<li>Dimensions:½” NB – 24″ NB（DN15 – DN600）</li>
<li>Pressure Class: Class 150 to 2500</li>
<li>Face: Raised face (RF), Ring type joint (RTJ)</li>
<li><span style=”color: #0000ff;”>Blind Flange</span></li>
<li>Dimensions:½” – 60″（DN15-DN1500）</li>
<li>Pressure Class:150# 300# 600#900#1500#</li>
</ul>

Types of Steel Pipes & Tubes

<ul>
<li><span style=”color: #0000ff;”> </span><span style=”color: #0000ff; font-size: 19.2px;”>Seamless Pipe</span></li>
<li>OD Φ6 – Φ630 mm, WT 0.5 – 80 mm</li>
<li><span style=”color: #0000ff;”>Welded Pipe</span></li>
<li>OD Φ15 – Φ3000 mm (up to 3m for spiral)</li>
<li><span style=”color: #0000ff;”>Precision Tube</span></li>
<li>OD Φ4 – Φ100 mm, WT tolerance ±0.05mm</li>
<li><span style=”color: #0000ff;”>Capillary Tube</span></li>
<li>OD 0.5 – 6 mm, WT down to 0.1mm</li>
<li><span style=”color: #0000ff;”>Coiled Tube</span></li>
<li>Up to 100–1000m long, for OD &lt; Φ25mm</li>
</ul>

Types of Fittings

90° Butt Weld Elbows
90° Tri-Clamp x Butt Weld Elbows
90° Tri-Clamp Elbows
Reducing Tri-Clamp 90° Elbows
Reducing Tri-Clamp x Butt Weld 90° Elbows
45° Butt Weld Elbows
45° Tri-Clamp x Butt Weld Elbows
45° Tri-Clamp Elbows
Butt Weld 88° Elbow
Tri-Clamp x Butt Weld 88° Elbow
Tri-Clamp x Butt Weld 92° Elbow

Overall Supply Range of Metal Strip & Foil

<h5><img class=”alignnone wp-image-11592″ src=”https://hloem.net/wp-content/uploads/2025/10/250923-steel-coil.svg” alt=”” width=”62″ height=”62″ /> Strip &amp; Foil</h5>
<ul>
<li>Thickness(Thin Strip):0.02 mm – 0.5 mm</li>
<li>Thickness(Foil):≤ 0.02 mm（20 μm）</li>
<li>Narrow width: 5–50 mm (for electronic leads)</li>
<li>Wide width: 50–600 mm (for general coil applications)</li>
<li>Coil Length:Continuous rolls, each roll 10–3000 meters</li>
<li>Roll weight: 1–500 kg (depending on material density)</li>
<li>Finishes:Bright,Matte,Embossed,Coated</li>
</ul>

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