ASTM B564 INCOLOY 825/UNS NO8825(DIN 2.4858) WELDING NECK FLANGE WNRF B16.5
Weld Neck Flange is flanges that designed to be joined to a piping system by butt welding. This kind of flange include lots of specification.
Weld Neck Flange is expensive because of its long neck and cost of people for contact WN flange with pipeline or fitting but is preferred for high-stress applications. The necks, or hubs, transmits stresses to the pipeline.
The gradual transition of thickness from the base of the hub to the wall thickness at the butt weld provides important reinforcement of the Weld Neck Flange. The bore of Weld-Neck flange matches bore of the pipeline, reducing turbulence and erosion.
ASTM B564 UNS N08825, also known as Incoloy 825, is a high nickel alloy that is used in high corrosion and high temperature applications. It has different designations in different countries: ASTM B424 Gr. UNS N08825(US), DIN 17750 Gr. 2.4858, JIS G4902 Gr. NCF 825.
Incoloy 825 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℃.
Specification: ASTM B564/ ASME SB564, ASTM B637/ ASME SB637, ASTM B462/ ASME SB462, ASTM B865/ ASME SB865
Grade: Inconel 600 (UNS N06600, Alloy 600, 2.4816), Inconel 601 (UNS N06601, Alloy 601, 2.4851), ASTM B564 Inconel 625 (UNS N06625, Alloy 625, 2.4856), Incoloy 800 (UNS N08800, Alloy 800, 1.4876)
Connect Type/ Flange Face Type: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Large Tongue & Groove, Small Tongue, Groove
Size Range: 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Standard: To ANSI, DIN, EN, JIS, etc. or according to drawing
Flange's type:
| Incoloy 825 Slip On Flanges | Incoloy 825 Weld Neck Flanges |
| Incoloy 825 weld neck rtj Flanges | Incoloy 825 blind flange |
| Alloy 825 BLRF Flanges | Incoloy 825 orifice flange |
| 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 |
INCOLOY 825 FLANGES 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 |
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 % |
Nickel alloys’ application:
- Desalination plants
- Pressure vessels
- Oil platforms
- Heat exchangers
- Seawater handling
- Pulp bleaching
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ASTM B564 Incoloy 825, UNS NO8825, DIN 2.4858 Flange WNRF B16.5 Images
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