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1. outstanding corrosion resistance in alkaline and acidic halide-containing media
2. excellent resistance to sulfuric acid, even in highly concentrated form
3. excellent resistance to corrosion and erosion in phosphoric acid media
4. outstanding resistance to surface corrosion and local corrosion in chlorine dioxide bleaching plants in paper production
5. excellent resistance in reducing and oxidizing media as well as in boiling azeotropic nitric acid
Grade | UNS | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Ni | Cr | Cu | Mo | N |
Alloy 31 | N08031 | 0.015 | 2 | 0.025 | 0.01 | 0.3 | 30.0-32.0 | 26.0-28.0 | 1.0-1.4 | 6.0-7.0 | 0.15-0.25 |
Mechanical properties | Tensile, min, ksi[MPa] | Yield, min, ksi[MPa] | Elongation, %(min) |
Alloy 31 | 94[650] | 40[276] | 40 |
Pipe Smls | Tube Smls | Sheet/Plate | Bar | Forging | Fitting |
ASTM B622 | ASTM B622 | ASTM B625 | ASTM B472/ASTM B649 | ASTM B564 | ASTM B366 |
Alloy 31 Equivalent Grades
STANDARD | WERKSTOFF NR. | UNS | EN |
Alloy 31 | 1.4562 | N08031 | X1NiCrMoCu32-28-7 |
Alloy 31 Application：
Components for flue gas desulfurization (FGD) plants
Plants for the production of phosphoric acid via the wet digestion process
Pipes and heat exchangers for sulfuric acids contaminated with chlorides
Pipes containing ocean water and brackish water, condensers and chillers
Pickling plants for sulfuric acid as well as nitric-hydrofluoric acid
Treatment of sulfuric acids from waste
Evaporation and crystallization of salts
Components for the cellulose and paper industry
Digestion of ores, e.g. in HIPAL (high-pressure acid leach) plants for the digestion of laterite ores
Mineral oil production and refineries
Organic acids and ester synthesis
Strain-hardened transport and feed pipes as well as slicklines, wirelines and flowlines in the transport of oil and gas
Marine scrubber / ship diesel scrubber
