Hastelloy C276 Flanges

Hastelloy C276 Flanges are forged rings used to connect pipes, valves, and equipment, creating a highly secure and removable joint in severe service piping. As a key specialty product from Zeron Fasteners, these flanges utilize the outstanding properties of the nickel-chromium-molybdenum alloy to provide exceptional defense against a broad range of corrosive chemicals, including strong acids and chloride-containing media. They are indispensable in systems requiring periodic inspection or modification, such as heat exchangers and pressure vessels in the Chemical Processing (CPI) and Marine industries. We supply a full range of flange types, including Weld Neck (for critical applications), Slip-On, Blind (for sealing pipe ends), and Socket Weld, all manufactured to strict ASME B16.5 and B16.47 specifications.

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Hastelloy C276 Flanges

Hastelloy C276 Chemical Composition

Element Composition (%)
Nickel (Ni) Balance
Molybdenum (Mo) 15.0 to 17.0
Chromium (Cr) 14.5 to 16.5
Tungsten (W) 3.0 to 4.5
Iron (Fe) 4.0 to 7.0
Carbon (C) 0.010 max
Silicon (Si) 0.08 max
Cobalt (Co) 2.5 max

Hastelloy C276 Mechanical Properties

Property Value (Minimum)
Tensile Strength, min 690 MPa (100,000 psi)
Yield Strength (0.2% Offset), min 283 MPa (41,000 psi)
Elongation, min 40%
Standard Pressure Ratings (ASME B16.5) Class 150 to Class 2500
Flange Face Finish Stock or Spiral Serrated

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