Material grade: Alloy 31
US grade: UNS N08031
German grade: 1.4562
I. Overview of Alloy 31 (N08031)nickel-based alloy:
1. Alloy 31 (N08031) is a nitrogen-containingiron-nickel-chromium-molybdenum alloy with properties between super austeniticstainless steel and existing nickel-based alloys. It is suitable for industrialfields such as chemical and petrochemical, environmental engineering and oiland gas production.
2. Main Features:
(1) Excellent corrosion resistance in halidemedia (whether acidic or alkaline)
(2) Excellent corrosion resistance in anyconcentration of sulfuric acid
(3) Excellent corrosion resistance andcorrosion resistance in phosphoric acid medium
(4) Excellent resistance to local and uniformcorrosion in chlorine dioxide bleach media
(5) Excellent corrosion resistance in bothreducing and oxidizing environments
(6) Easy to process and weld
(7) Certified for pressure vessels with awall temperature of -196 to 450 ° C.
II. Chemical composition: seetable 1:
Table 1 %
III. Mechanical properties:
1. Density: 8.1g / cm3
2. Melting point: 1350-1450 ° C
3. Tensile strength: σb≥650Mpa
4. Yield strength: σb≥276Mpa
5. Elongation: δ≥40
6, Brinell hardness (HB): 220.
IV. Application fields:
Flue gas desulfurization system, pulp andpaper industry, fine chemical synthesis industry, phosphoric acid production,organic acid and ester synthesis, waste sulfuric acid recovery, seawater orbrine heat exchanger, ore treatment and laterite ore High-pressure acidfiltration technology, petroleum production and refining, pickling plant(H2SO4), sulfuric acid condenser, evaporation and crystallizing salt, acid gasenvironment (in accordance with NACE standard MR0175, level VI).
V. Specifications and Ex-factorystatus
1. Classification: Huacheng Jinyan can supplyin form of seamless pipes, steel plates, round steel, forgings, flanges, rings,welded pipes, steel strips, wire and supporting welding materials.
2.Ex-factory status: Seamless Tube: solidsolution + acid white, length can be fixed; Plate: solid solution, pickling,trimming; Welded Tube: solid solution acid white + RT% flaw detection; Forging:annealing + turning; the bar is delivered in the state of forging, surfacepolishing or lapping; the strip is delivered after cold rolling, solid solutionsoftening, and descaling; the wire is solid-dissolved and pickled in a disc orstraight strip, solid solution straight polished.