Hastelloy C276 Pipe Fittings
Hastelloy C276 Pipe Fittings Manufacturer & Supplier
Hastelloy C276 Pipe Fittings are high-performance nickel–molybdenum–chromium alloy fittings designed for superior corrosion resistance in the most aggressive environments. Known as one of the most corrosion-resistant alloys available, Hastelloy C276 offers exceptional protection against pitting, crevice corrosion, stress corrosion cracking, oxidizing agents, reducing acids, and chloride-containing solutions.
This alloy is widely used in industries where exposure to strong acids, seawater, organic compounds, and high-temperature environments is unavoidable. It retains excellent mechanical strength and metallurgical stability even under extreme pressure and temperature conditions, making it the preferred choice for critical piping systems.
Key Features
Exceptional resistance to pitting & crevice corrosion
Superior performance in reducing and oxidizing environments
Resistant to wet chlorine gas, hypochlorites, chlorine dioxide
Excellent protection against strong acids including HCl, H₂SO₄, and HNO₃
High resistance to stress-corrosion cracking
Excellent mechanical strength at high temperatures
Outstanding weldability & fabricability
Preferred alloy for chemical processing & pollution control systems
Specifications
| Category | Details |
|---|---|
| Material | Hastelloy C276 |
| UNS Number | N10276 |
| Werkstoff Nr. | 2.4819 |
| Standard | ASTM B366 / ASME SB366 |
| Type | Seamless, Welded, Buttweld, Forged |
| Fitting Types | Elbow, Tee, Reducer, Cap, Stub End, Cross, Nipple |
| Size Range | ½” to 48” |
| Schedule | SCH 10s–XXH |
| Dimensions | ASME B16.9, ASME B16.28, MSS SP-43 |
| Connections | Buttweld, Socket Weld, Threaded |
| Manufacturing Method | Hot Forming, Cold Forming, Fabricated |
Equivalent Grades
| Grade | UNS | Werkstoff Nr. |
|---|---|---|
| Hastelloy C276 | N10276 | 2.4819 |
Available Sizes
Pipe Fittings: ½” to 48”
Thickness: SCH 10 to XXH
Custom sizes and dimensions available based on project requirements.
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | Balance |
| Molybdenum (Mo) | 15.0 – 17.0 |
| Chromium (Cr) | 14.5 – 16.5 |
| Iron (Fe) | 4.0 – 7.0 |
| Tungsten (W) | 3.0 – 4.5 |
| Cobalt (Co) | ≤ 2.5 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 0.08 |
| Carbon (C) | ≤ 0.01 |
| Vanadium (V) | ≤ 0.35 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.03 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 760 MPa (Min) |
| Yield Strength | 280 MPa (Min) |
| Elongation | 40% |
| Hardness | 100 HRB (Max) |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.89 g/cm³ |
| Melting Range | 1325 – 1370°C |
| Thermal Conductivity | 10 W/m·K |
| Electrical Resistivity | 1.21 µΩ·m |
| Specific Heat | 420 J/kg·K |
| Modulus of Elasticity | 205 GPa |
Types of Hastelloy C276 Pipe Fittings
Long Radius & Short Radius Elbows
Equal & Reducing Tees
Concentric & Eccentric Reducers
End Caps
Stub Ends (Short & Long)
Cross Fittings
Pipe Nipples
Custom & Fabricated Fittings
Corrosion Resistance
Strong oxidizing and reducing environments
Wet chlorine gas, chlorine dioxide & hypochlorite media
Sulfuric, hydrochloric & nitric acid mixtures
Seawater & brine environments
Organic acids & contaminated chemical streams
Pitting, crevice corrosion & stress-corrosion cracking
Heat Resistance
Excellent oxidation resistance up to 1250°C
Retains strength in high-temperature and high-pressure systems
Resistant to carburization & thermal fatigue
Suitable for heat exchangers, furnace systems & high-temperature chemical reactors
Heat Treatment
Solution Annealing: 1120°C – 1175°C
Cooling: Rapid water quenching recommended
The alloy is not hardenable by heat treatment
Welding
Hastelloy C276 offers excellent weldability using:
GTAW / TIG Welding
SMAW / Stick Welding
GMAW / MIG Welding
Plasma Arc Welding
Recommended filler metals:
Hastelloy C276 filler wire
Hastelloy C22 (for some corrosion-critical welds)
Nickel Alloy 625 (specific applications)
Fabrication
Good hot & cold forming characteristics
Work-hardens rapidly: requires heavy-duty tools
Suitable for bending, rolling, and machining
Maintains strength & toughness after fabrication
Lower heat input recommended during welding
Applications
Chemical Processing Industry
Petrochemical & Refining Plants
Pollution Control Systems
Pharmaceutical Production
Pulp & Paper Bleaching Systems
Marine & Offshore Engineering
Acid Production Units
Waste Treatment Plants
Heat Exchangers, Reactors & Evaporators
Flue Gas Desulfurization Systems