Hastelloy C276 Pipe Fittings (UNS N10276) refers to nickel molybdenum chrome alloy pipe fittings that have been designed for extremely aggressive and high temperature uses. This alloy, which contains nickel, chrome, molybdenum and tungsten, has very high resistance to oxidation, reduction, pitting, crevice and stress corrosion cracking. These come in a variety of shapes, sizes seamless fittings from 1/2" to 10" and welded fittings from 1/2" to 48 and are in seamless and buttweld configurations, per ASTM B366. They have a high melting temperature typically above 1375°C, and possess good mechanical properties, which makes them a broad application in chemical processing, marine, oil & gas, heat exchanger applications etc. Metinox Overseas delivers precision-engineered Hastelloy C276 fittings with strict quality control and reliable performance.
Table of Contents
- Hastelloy C276 Pipe Fittings Specifications
- Hastelloy C276 Chemical Composition
- Hastelloy C276 Pipe Fittings Mechanical Properties
- Equivalent Grades of Hastelloy C276 Pipe Fittings
- Different Types of Hastelloy C276 Pipe Fittings
- Thermal Properties of Hastelloy C276 Pipe Fittings
- Dimension Chart of Hastelloy C276 Pipe Fittings
- Weight Chart of Hastelloy C276 Pipe Fittings
- Size Chart of Hastelloy C276 Pipe Fittings
- Corrosion Resistance of Hastelloy C276 Pipe Fittings
- Applications and Industrial Uses
- Related Products
- Frequently Asked Questions
Hastelloy C276 Pipe Fittings Specifications
| Material Standards | ASTM: B366 | ASME: SB 366 |
|---|---|
| Material Designations | UNS: N10276 | W.Nr. (Werkstoff Nr): 2.4819 |
| Trade Names | Hastelloy® C276 (Haynes International), Nicrofer® 5716 hMo (VDM Metals), Nickelvac® HC-276 |
| Dimensional Standards | ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Stock Size Range | Seamless Fittings: 1/2" – 10" | Welded Fittings: 1/2" – 48" |
| Wall Thickness / Schedule | SCH 10 To SCH 160 |
| Fittings Form & Types | Tee (Equal & Unequal), Cap, Elbow (Standard & Reducing), Reducer, Stub Ends, Nipple, Cross |
| Manufacturing Process | Hot forming, Mandrel |
| Elbow / Fitting Method | Seamless, Welded, Fabricated |
| Elbow Bending Radius | 1D, 2D, 3D, 5D |
| Elbow Bending Method | Rotary Draw Bending, Ram-Type Bending, Mandrel Bending, Roll Bending |
| Surface Finish | Polished, Pickled, Mill |
| Physical Properties | Density: 8.89 g/cm³ | Melting Point: 1325–1370°C | Temperature Range: 1,323 – 1,371°C |
| Testing & Quality Control | Ultrasonic test, HIC tested, PMI (Positive Material Identification) |
| Documentation Supplied | 100% Radiography Test Report, Third Party Inspection Report |
| Approved Origin | Japanese, Indian, Korean, European, American |
| Applications | Chemical Processing, Sour Gas, Pharmaceuticals |
| Packaging Options | Bubble wraps, Packed in Wooden Boxes, As per Customer's Request |
Hastelloy C276 Chemical Composition
| Element | Symbol | Composition (Weight %) |
|---|---|---|
| Nickel | Ni | Balance (Typically 57.00% – 60.00%)* |
| Molybdenum | Mo | 15.00% – 17.00% |
| Chromium | Cr | 14.50% – 16.50% |
| Iron | Fe | 4.00% – 7.00% |
| Tungsten | W | 3.00% – 4.50% |
| Cobalt | Co | 2.50% max |
| Manganese | Mn | 1.00% max |
| Silicon | Si | 0.08% max |
| Vanadium | V | 0.35% max |
| Phosphorus | P | 0.04% max |
| Sulfur | S | 0.03% max |
| Carbon | C | 0.010% max |
Hastelloy C276 Pipe Fittings Mechanical Properties
| Condition | Tensile Strength ksi (MPa) | Yield Strength ksi (MPa) | Elongation % |
|---|---|---|---|
| Annealed | 100 (690) | 41 (283) | 40 |
Equivalent Grades of Hastelloy C276 Pipe Fittings
| Standard / System | UNS | Werkstoff Nr. (Germany) | GOST (Russia) | JIS (Japan) | EN / OR (European Norm) |
|---|---|---|---|---|---|
| Designation | N10276 | 2.4819 | ХН65МВУ (ЭП760) | NW 0276 | NiMo16Cr15W |
Different Types of Hastelloy C276 Pipe Fittings
Hastelloy C276 45 Degree Elbow
Hastelloy C276 90 Degree Elbow
Hastelloy C276 Pipe Tee
Hastelloy C276 Pipe Reducer
Hastelloy C276 Pipe Cap
Hastelloy C276 Stub End
Hastelloy C276 Pipe Cross
Hastelloy C276 Pipe Nipple
Hastelloy C276 Reducing Elbow
Thermal Properties of Hastelloy C276 Pipe Fittings
| Property | Value |
|---|---|
| Specific Heat | 427 J/kg · °C |
| Thermal Conductivity | 10.5 W/(m · °C) |
| Electrical Resistivity | 1.23 μΩ·m |
Dimension Chart of Hastelloy C276 Pipe Fittings
| Nominal Size (NPS) | Outer Diameter of Pipe (D) mm | 45° Elbow Center-to-End (B) mm | 90° Elbow Center-to-End (A) mm |
|---|---|---|---|
| ½ | 21.3 | 16 | 38 |
| ¾ | 26.7 | 19 | 38 |
| 1 | 33.4 | 22 | 38 |
| 1¼ | 42.2 | 25 | 48 |
| 1½ | 48.3 | 29 | 57 |
| 2 | 60.3 | 35 | 76 |
| 2½ | 73.0 | 44 | 95 |
| 3 | 88.9 | 51 | 114 |
| 3½ | 101.6 | 57 | 133 |
| 4 | 114.3 | 64 | 152 |
| 5 | 141.3 | 79 | 190 |
| 6 | 168.3 | 95 | 229 |
| 8 | 219.1 | 127 | 305 |
| 10 | 273.0 | 159 | 381 |
| 12 | 323.8 | 190 | 457 |
| 14 | 355.6 | 222 | 533 |
| 16 | 406.4 | 254 | 610 |
Weight Chart of Hastelloy C276 Pipe Fittings
| Nominal Pipe Size (NPS) | Weight in Kilograms (KG) |
|---|---|
| ½ | 0.04 |
| ¾ | 0.04 |
| 1 | 0.11 |
| 1¼ | 0.17 |
| 1½ | 0.18 |
| 2 | 0.37 |
| 2½ | 0.79 |
| 3 | 1.19 |
| 3½ | 1.59 |
| 4 | 2.04 |
| 5 | 3.40 |
| 6 | 5.44 |
| 8 | 10.43 |
| 10 | 19.51 |
| 12 | 28.12 |
| 14 | 36.29 |
| 16 | 45.36 |
| 18 | 57.15 |
| 20 | 72.57 |
Size Chart of Hastelloy C276 Pipe Fittings
| Nominal Diameter (Inches) | Equivalent Decimal (Inches) | O.D. or I.D. Diameter (Inches) | Typical Threads Per Inch (TPI) |
|---|---|---|---|
| 1/16 | 0.313 | 5/16 | 27 |
| 1/8 | 0.405 | 13/32 | 27 |
| 1/4 | 0.540 | 35/64 | 18 |
| 3/8 | 0.675 | 43/64 | 18 |
| 1/2 | 0.840 | 27/32 | 14 |
| 3/4 | 1.050 | 1-3/64 | 14 |
| 1 | 1.315 | 1-5/16 | 11-1/2 |
| 1-1/4 | 1.660 | 1-21/32 | 11-1/2 |
| 1-1/2 | 1.900 | 1-29/32 | 11-1/2 |
| 2 | 2.375 | 2-3/8 | 11-1/2 |
| 2-1/2 | 2.875 | 2-7/8 | 8 |
| 3 | 3.500 | 3-1/2 | 8 |
| 3-1/2 | 4.000 | 4 | 8 |
| 4 | 4.500 | 4-1/2 | 8 |
Corrosion Resistance of Hastelloy C276 Pipe Fittings
| Service Media | Concentration (Weight %) | Temperature | Mean Corrosion Rate (mpy) | Service Suitability & Engineering Notes |
|---|---|---|---|---|
| Acetic Acid | 99% | Boiling | < 1 | Excellent resistance; highly stable in organic acid environments. |
| Ferric Chloride | 10% | Boiling | 2 | Excellent resistance to pitting and crevice corrosion in severe chloride solutions. |
| Formic Acid | 88% | Boiling | 2 | Excellent resistance under elevated organic acid conditions. |
| Sulfuric Acid (H2SO4) | 50% | 66°C (150°F) | 4 | Highly resistant; strong performance across intermediate concentrations. |
| Hydrochloric Acid (HCl) | 1% | Boiling | 10 | Good resistance; maintains reliable performance under dilute, boiling reducing conditions. |
| Nitric Acid + 6% HF | 5% | 60°C (140°F) | 207 | ⚠ NOT RECOMMENDED. This unusually high rate (5.26 mm/year) is standard for strongly oxidizing acid mixtures. Data shown for reference only — consult manufacturing engineers for specific media suitability. |
Applications and Industrial Uses of Hastelloy C276 Pipe Fittings
- Construction
- Bridges
- Petrochemical Industry
- Ship Building
- Engineering
- General Structural Purposes
- Offshore and Onshore Services
- Power Generation Industries
- Food Processing Industries
- Oil & Gas Industries
- Sugar Industries
Frequently Asked Questions
Hastelloy C276 is a nickel-based alloy known for excellent resistance to corrosion in harsh chemical and high-temperature environments.
The UNS designation for Hastelloy C276 is UNS N10276.
The Werkstoff (DIN) number for Hastelloy C276 is 2.4819.
They are made of nickel, molybdenum, chromium, and small amounts of tungsten for superior corrosion resistance.
Hastelloy C276 fittings contain approximately 57% nickel, which enhances their corrosion resistance.
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