UNS N08825 WELDING-NECK WNRF FLANGE ASTM B564 INCOLOY825 B16.5
ASTM B564 INCOLOY825 UNS NO8825 WELDING NECK FLANGE WNRF B16.5
Overview
Incoloy825 is an iron-nickel-chromium alloy with molybdenum, copper and titanium elements. The chemical composition of the alloy is designed for working conditions that require excellent resistance to a variety of corrosive environments. The appropriate hot working temperature of the alloy is 1150-900 ℃, and the cooling method can be water quenching or rapid air cooling. Incoloy825 is a general engineering alloy. It has resistance to acid and alkali metal corrosion in both oxidation and reduction environments. High nickel content makes the alloy have effective resistance to stress corrosion cracking. It has good corrosion resistance in various media, such as sulfuric acid, phosphoric acid, nitric acid and organic acid, and alkali metals such as sodium hydroxide, potassium hydroxide and hydrochloric acid solution.
Incoloy825 Flange has excellent resistance to chloride-ion-induced stress corrosion cracking, reducing environments containing phosphoric and sulfuric acids, oxidizing environments containing nitric acid and nitrates, and pitting, crevice corrosion and intergranular corrosion. It has good mechanical properties at cryogenic temperatures to moderately high temperatures up to 538℃.
Incoloy825 characteristics:
- Good stress corrosion cracking resistance
- Good resistance to spot corrosion and crevice corrosion
- Good oxidation resistance and non-oxidation hot acid performance
- Good mechanical properties at room temperature and high temperature up to 550 ℃
- Certification of pressure vessels with manufacturing temperature up to 450 ℃
Incoloy825 Flange's type
| Incoloy 825 Slip On Flanges | Incoloy 825 Weld Neck Flanges |
| Incoloy 825 weld neck rtj Flanges | Incoloy 825 blind flange |
| Incoloy 825 BLRF Flanges | Incoloy 825 orifice flange |
Incoloy825 Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | AFNOR | GOST | JIS | BS | EN | OR |
| Incoloy 825 | 2.4858 | N08825 | NC 21 FeDU | XH38BT | NCF 825 | NA 16 | NiCr21Mo | ЭП703 |
Incoloy825 Chemical Composition
| Grade | Cr | Fe | Ni | C | Mn | Cu | Si | S |
| Incoloy 825 | 19.5 – 23.5 | 1.0 max | 38.0 – 46.0 | 0.05 max | 1.0 max | 1.5 – 3.0 | 0.5 max | 0.03 max |
Incoloy825 Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.47 g/cm3 | 1413 °C (2580 °F) | Psi – 95000, MPa – 655 | Psi – 45,000 , MPa – 310 | 40 % |
Typical Application of Incoloy 825:
- Heating pipes, containers, baskets and chains used in sulfuric acid pickling plants.
- Seawater cooling heat exchanger, marine product pipeline system and sour gas environment pipeline.
- Heat exchanger, evaporator, washing, impregnation tube, etc. in phosphoric acid production,
- Air heat exchanger in petroleum refining
- Food engineering
- Chemical process
- Flame retardant alloy for high-pressure oxygen application
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