Hastelloy C276 Socket Weld Flanges

A Socket Weld Flange is a type of flange where the pipe is inserted into a recessed area (the socket) within the flange before being fillet-welded around the outside. This design provides high internal pressure holding capability and is generally used on smaller pipe diameters (NPS 4 and smaller) in applications that do not require radiographed joints. Forged from Hastelloy C276, the resulting flange offers exceptional protection against a wide spectrum of aggressive media, including reducing and mild oxidizing acids, making them critical components in chemical processing and petrochemical industries. Zeron Fastners is a trusted manufacturer and supplier of these durable nickel alloy flanges, guaranteeing reliable, high-integrity connections for challenging piping systems.

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Hastelloy C276 Socket Weld Flanges

Hastelloy C276 Chemical Composition

Element Composition (%)
Nickel (Ni) Balance
Molybdenum (Mo) 15.0 to 17.0
Chromium (Cr) 14.5 to 16.5
Iron (Fe) 4.0 to 7.0
Tungsten (W) 3.0 to 4.5
Carbon (C) 0.010 max
Vanadium (V) 0.35 max
Cobalt (Co) 2.5 max

Hastelloy C276 Mechanical Properties

Property Value
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 300 to Class 2500
Flange Joint Type Fillet Welded (Inside and Outside)
Hardness (Rockwell B) 100 max
Density 8.89 g/cm3 (0.321 lb/in3)

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