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AL6XN

The AL6XN alloy is a super austenitic stainless steel with UNS designation of N08367 which exhibits good resistance to a broad range of severely corrosive environments, especially the chloride bearing environments. Compared to Hastelloy C-276 and titanium alloys, it has favourable corrosion resistance in many instances while it is much more cost-effective. AL6XN is a typical 6Mo stainless steel with high nickel and chromium content, as well as deliberate addition of nitrogen & copper(its nominal chemical composition is 46Fe-24Ni-21Cr-6Mo-Cu-N). It has outstanding resistance to pitting corrosion, crevice corrosion and stress corrosion even at high temperatures.

AL6XN lap joint stub end

A lap joint stub end made to ASME B16.9. Material spec.: AL6XN(ASTM A403 WP6XN / UNS N08367). 4″ SCH80 long pattern.

Chemical Composition of AL6XN

CMnPSSiCrNiMoNCuFe
≤0.030≤2.00≤0.040≤0.030≤1.0020.0~22.023.5~25.56.0~7.00.18~0.250.75Remainder
*All values are in weight percentage.
*Mechanical properties vary in different product forms and heat treatment conditions.

Physical Properties of AL6XN

PropertyValue(Units)
Density0.291 lb/in³
8.06 g/cm³
Modulus of Elasticity23.8 ×106 psi
195 Gpa
Melting Range2410 to 2550 ℉
1320 to 1400 ℃
Thermal Conductivity7.5 Btu/hr • ft • ℉
14.1 W/(m • K)
Coefficient of Expansion7.9 10-6/℉
14.2 10-6/℃
Specific Heat capacity0.11 Btu/lb • ℉
500 J/kg • K
Electrical Resistivity535 Ohm • circ mil/ft
0.89 Ωm
Scaling temperature1885 ℉
1030 ℃

Product and Standards

ProductSpecification
UNS N08367ASMEASTM
Plate, Sheet & StripSA-240, SB-688A240, B688
Rod, Bar & WireSB-691B691
Welded PipeSB-675B675
Heat Exchanger TubingSA-249A249
Sanitary TubingSA-270A270
Welded Tube (General Applications)SB-676B676, A269
Seamless Pipe & TubeSB-690B690
Billets and Bars for ReforgingSB-472B472
Forged Flanges, Fittings & ValvesSB-462B462
Butt Weld Pipe FittingsSB-366, SA-403B366, A403
ForgingsSB-564, SA-182B564, A182
Pipe Welded w/ FillerSB-804B804
Castings (CN-3MN, UNS J94651)SA-351A743, A744, A351

Applications of AL6XN

AL6XN alloys are widely used in seawater desalination systems, flue gas desulfurization (FGD) systems, chemical process vessels and pipelines, seawater heat exchangers, oil distillation columns and packing, offshore platforms, pulp and paper industry, etc.

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Austenitic Stainless Steel

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    Hebei Metals Industrial Limited
    (Shijiazhuang Metalsin Pipeline Tech Co., Ltd)
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