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AL6XN

AL6XN

Nickel (Ni) - 24.5 Median
(23.5 Min - 25.5 Max)
Chromium (Cr) - 21.0 Median
(20.0 Min - 22.0 Max)
Molybdenum (Mo) - 6.5 Median
(6.0 Min - 7.0 Max)
Iron (Fe) - 43.935 Balance
Manganese (Mn) - 2.0 Max
Silicon (Si) - 1.0 Max
Other

Key

Nickel
Copper
Chromium
Aluminum
Molybdenum
Iron
Titanium
Manganese
Cobalt
Other
  • Nickel (Ni) 24.5 Median
    (23.5 Min - 25.5 Max)
  • Copper (Cu) 0.75 Max
  • Chromium (Cr) 21.0 Median
    (20.0 Min - 22.0 Max)
  • Molybdenum (Mo) 6.5 Median
    (6.0 Min - 7.0 Max)
  • Iron (Fe) 43.935 Balance
  • Manganese (Mn) 2.0 Max
  • Carbon (C) 0.03 Max
  • Silicon (Si) 1.0 Max
  • Nitrogen (N) 0.2150 Median
    (0.18 Min - 0.25 Max)
  • Phosphorus (P) 0.04 Max
  • Sulfur (S) 0.03 Max

UNS N08367

AL6XN is a super-austenitic alloy, the most abundant element being iron. It is the most popular of the 6% molybdenum alloys. Common usages are in the food processing, pharmaceutical and biotech industries. In most environments, it shows superior corrosion resistance when compared to duplex alloys. Due to the lower nickel content, AL6XN fasteners are generally more economical than the high nickel alloy fasteners.

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Summary

  • Environment:
    Mildly Corrosive: Salt Water & Mild Acids
  • Temperature Limit:
    1000 °F / 538 °C
  • Ultimate Tensile (Typical):
    108 ksi / 745 mpa

Specifications & Technical Data

If your question isn’t answered below, download the technical data sheet here.

Specifications

  • Plate: ASTM A240, ASME A240

Applications

  • Flue gas desulfurization (FGD) equipment
  • Reverse osmosis desalination equipment and pumps
  • Chemical process tanks and pipelines
  • Seawater heat exchangers
  • Tall oil distillation columns and packing
  • Offshore oil and gas production equipment
  • Pulp bleaching plant washer, vats, press rolls, and pipelines
  • Salt dryers

Physical Properties

Density: 0.291 lb/in3

Melting Range: 2410 – 2540°F

Electrical Resistivity at 68°F: 535 Ohm-circ mil/ft

Temperature, ° F 70 200 300 400 600 700 800
Coefficient* of Thermal Expansion, in/in°F x 10 -6 – 7.9 8.3 8.4 8.6 8.7 8.8
Thermal Conductivity Btu • ft/ft2 • hr • °F 6.7 7.5 8.1 8.7 10.0 10.6 11.2
Modulus of Elasticity Dynamic, psi x 106 28.3 27.4 – 26.1 24.8 – 23.4

*70°F to indicated temperature

Mechanical Properties

Minimum Specified Properties, ASME SB-688 Plate
Ultimate Tensile Strength, ksi 95
0.2% Yield Strength, ksi 45
Elongation, % 30
Hardness MAX, HRC 30.5

 

Typical Tensile Properties, Plate
Temperature, °F -450 -320 70 200 400 600 800 1000
Ultimate Tensile Strength, ksi 218.0 196.0 108.0 99.9 90.3 86.0 87.0 83.6
0.2% Yield Strength, ksi 142.0 107.0 53.0 49.4 40.4 36.3 36.0 34.0
Elongation, % 36 49 47 47 46 47 48 50
Charpy Impact V-notch, ft-lbs 322* 85 140 – – – – –

*KIC Fracture Toughness

ASME Maximum Allowable Stresses, Section VIII, Division 1, ksi
Temperature, °F 200 400 600 800
AL-6XN® 27.1 24.6 23.3 22.6
316L 20.0 19.3 17.0 15.9
Alloy 400 18.7 18.7 18.7 15.0

 

Corrosion Resistance

PREN CPT, °F CCCT, °F
AL-6XN® 44 172 110
ZERON® 100 41 180 108
316L 24 68 <28

PREN =%Cr + 3.3%Mo + 16%N
Critical Crevice Corrosion Temperature (CCCT) – ATSM G48B

In-stock

AL6XN Fasteners

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Bolts & Screws
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Set Screws
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Socket Products
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Vented Products
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Nuts
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Studs & Rods
U-bolts
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Fittings
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Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

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