Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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Hastelloy C276 Flange , ASTM B462 UNS N10276 / 2.4819 Nickel Alloy Blind Flange
ASTM B462 C276 Hastelloy Blind Flange is a solid disk used to blank off the end of a piping system, a pressure vessel opening, or a valve. It is manufactured from a nickel-chromium-molybdenum alloy known for exceptional corrosion resistance in a wide range of severe environments.
Advantages of Using C276 Blind Flanges
Long Service Life: Drastically reduces maintenance and replacement frequency in aggressive environments.
Reliability and Safety: Provides a robust and leak-proof seal for isolating high-pressure, hazardous systems.
Versatility: A single, well-chosen material (C-276) can often handle multiple process streams, simplifying inventory.
High-Temperature Capability: Maintains strength and corrosion resistance at elevated temperatures.
Equivalent Grades of ASTM B462 Hastelloy C276 Flange Nickel Alloy UNS N10276 Blind Flange
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | OR | GOST |
| Hastelloy C276 | N10276 | 2.4819 | - | NiMo16Cr15W | NW 0276 | ЭП760 | ХН65МВУ |
Chemical Composition of of ASTM B462 Hastelloy C276 Flange Nickel Alloy UNS N10276 Blind Flange
| Hastelloy C276 | Ni | C | Mo | Mn | Si | Fe | P | S | Co | Cr |
| Balance | 0.010 max | 15.00 – 17.00 | 1.00 max | 0.08 max | 4.00 – 7.00 | 0.04 max | 0.03 max | 2.5 max | 14.50 – 16.50 |
Mechanical properties (Minimum value at 20℃) of Hastelloy C276 Flange Nickel Alloy UNS N10276 Blind Flange
| Tensile Strengthσb/MPa | Yield Strengthσp0.2/MPa | Elongationσ5 /% |
| 690 | 283 | 40 |
When you request or purchase this component, ensure your purchase order or data sheet includes the following:
Material Specification: ASTM B462, Grade C276 / UNS N10276.
Product Standard: ASME B16.5 or ASME B16.47.
Size: Nominal Pipe Size (NPS) - e.g., 8", 12", 24".
Pressure Class: e.g., Class 150, Class 300, etc.
Facing: e.g., Raised Face (RF), Ring-Type Joint (RTJ).
Special Requirements:
Heat Number: Required for critical services to verify material properties.
Certification: Material Test Reports (MTRs) or Certificates of Conformance.
Non-Destructive Testing (NDT): Dye Penetrant (PT) or Ultrasonic Testing (UT) may be specified.
Positive Material Identification (PMI): Verification of alloy composition.
Application
Chemical Processing Industry (CPI): Reactors, vessels, and piping handling harsh acids (sulfuric, hydrochloric) and chlorine.
Pollution Control / Flue Gas Desulfurization (FGD): Scrubbers, ductwork, and dampers handling hot, wet, chlorinated gases.
Pulp and Paper Industry: Digesters, bleach plants (handling chlorine dioxide).
Pharmaceutical Industry: Critical process equipment requiring high purity and corrosion resistance.
Waste Incineration & Wastewater Treatment: Handling aggressive chemical by-products.
Marine and Offshore: For components exposed to seawater and sour gas (H₂S).
