Super Nickel Based Alloy Sheet Corrosion Resistance Incoloy 825 UNS
N08825 Nickel Alloy Plate
INCOLOY 825:
Incoloy 825 is a high-performance nickel-iron-chromium alloy. Its
chemical composition includes nickel (38-46%), chromium
(19.5-23.5%), iron (balance), carbon (≤0.025%), manganese (≤1.0 %),
silicon (≤0.5%), copper (1.5-3.0%), molybdenum (2.5-3.5%), aluminum
(≤0.2%), titanium (0.6-1.2%) and other elements. The physical
properties of this alloy include a density of 8.14 g/cm³ and a
melting point of 1370-1400°C. At normal temperature, its minimum
mechanical properties include tensile strength 550 N/mm², yield
strength 220 N/mm², elongation 30% and Brinell hardness ≤ 200.
The properties of Incoloy 825 include good resistance to stress
corrosion cracking, pitting and crevice corrosion, resistance to
oxidizing and non-oxidizing hot acids, and good mechanical
properties at room temperature and at elevated temperatures up to
550°C. In addition, the alloy has certification for manufacturing
pressure vessels up to 450°C.
Incoloy 825 is widely used in various industrial fields where the
operating temperature does not exceed 550°C, such as heating tubes,
containers, baskets and chains used in sulfuric acid pickling
plants, seawater cooling heat exchangers, marine product pipeline
systems, acid gas environment pipelines, Heat exchangers,
evaporators, washers, dip tubes, etc. in phosphoric acid
production, air heat exchangers in petroleum refining, food
engineering, chemical processes, and flame retardant alloys for
pressurized oxygen applications.
Incoloy 825 is suitable for welding with the same material or other
metals using any traditional welding process, such as tungsten
electrode inert gas shielded welding, plasma arc welding, manual
sub-arc welding, metal electrode inert gas shielded welding, and
melting electrode inert gas shielded welding. When using manual arc
welding, it is recommended to use a shielding gas mixed with
(Ar+He+H2+CO2) multiple components. Welding must be carried out in
the annealed state, and stains, dust and various marks must be
cleaned with a stainless steel wire brush.
| GRADE | UNS | DENSITY | DIN | GB |
| INCOLOY 825 | UNS N08825 | 8.14g/cm³ | W.NR.2.4858 | NS1402 |
CHEMICAL COMPOSITION:
| Ni | C | Fe | Mn | Cr | S | Mo |
| 38.0 - 46.0 | 0.05max | 22.0min | 1.0max | 19.5 - 23.5 | 0.03max | 2.5 - 3.5 |
| Si | Cu | Al | Ti | | | |
| 0.5max | 1.5 - 3.0 | 0.2max | 0.6 - 1.2 | | | |
SPECIFICATION:
| FORM | ASTM |
| Rod and bar | B 425 |
| Plate, sheet and strip | B 424, B 906 |
| Seamless pipe and tube | B 423, B 829 |
| Welded pipe | B 705, B 775 |
| Welded tube | B 704, B 751 |
| Fitting | B 366 |
| Forging | B 564 |
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