Hastelloy C-276丨UNS N10276
Hastelloy C-276 (UNS N10276 / W.Nr. 2.4819) is one of the most versatile nickel-molybdenum-chromium alloys available, offering exceptional resistance to oxidizing and reducing environments. It provides outstanding protection against pitting, crevice corrosion, stress corrosion cracking, and chloride-induced attack. Hastelloy C-276 is widely used in chemical processing, oil & gas, pollution control, marine engineering, and pharmaceutical industries. Available in pipe, tube, plate, sheet, bar, wire, fittings, flanges, and forgings.
Hastelloy C-276 Supplier & Manufacturer
Hastelloy C-276 (UNS N10276, W.Nr. 2.4819) is a nickel-molybdenum-chromium alloy recognized worldwide for its exceptional resistance to a wide range of corrosive environments. It is one of the most versatile corrosion-resistant nickel alloys available and is widely used in chemical processing, oil & gas, marine engineering, pollution control, power generation and pharmaceutical industries.
The alloy offers excellent resistance to oxidizing and reducing chemicals, wet chlorine gas, ferric and cupric chlorides, hot contaminated mineral acids, seawater, hypochlorite and chlorine dioxide solutions. Its low carbon content minimizes carbide precipitation during welding, helping maintain corrosion resistance in welded structures.
J&A Alloy supplies Hastelloy C-276 products in pipe, tube, plate, sheet, bar, wire, fittings, flanges and forgings with full material traceability and international standard compliance.
Key Features of Hastelloy C-276
- Outstanding resistance to oxidizing and reducing media
- Exceptional resistance to pitting and crevice corrosion
- Superior resistance to chloride stress corrosion cracking
- Excellent performance in wet chlorine environments
- Resistant to sulfuric acid, hydrochloric acid and phosphoric acid
- Excellent weldability without post-weld heat treatment
- Good mechanical properties over a wide temperature range
- Proven reliability in severe chemical processing applications
Chemical Composition of Hastelloy C-276
| Element | Composition (%) |
|---|---|
| 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 |
| Vanadium (V) | ≤ 0.35 |
| Silicon (Si) | ≤ 0.08 |
| Carbon (C) | ≤ 0.01 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.03 |
The combination of high molybdenum and chromium contents provides exceptional resistance to localized corrosion while maintaining structural integrity in aggressive environments.
Mechanical Properties of Hastelloy C-276
| Property | Value |
|---|---|
| Tensile Strength | 690 MPa min |
| Yield Strength (0.2% Offset) | 283 MPa min |
| Elongation | 40% min |
| Hardness | ≤ 100 HRB |
| Density | 8.89 g/cm³ |
| Melting Range | 1325 – 1370°C |
| Modulus of Elasticity | 205 GPa |
Hastelloy C-276 combines excellent corrosion resistance with good strength and toughness, making it suitable for demanding industrial applications.
Corrosion Resistance
Hastelloy C-276 is considered one of the most corrosion-resistant alloys available today.
The alloy demonstrates excellent resistance to:
Oxidizing Media
- Ferric chloride
- Cupric chloride
- Nitric acid mixtures
- Chlorine dioxide
Reducing Media
- Hydrochloric acid
- Sulfuric acid
- Phosphoric acid
Localized Corrosion
- Pitting corrosion
- Crevice corrosion
- Stress corrosion cracking
Marine Environments
- Seawater systems
- Offshore platforms
- Desalination plants
Its broad-spectrum corrosion resistance makes it a preferred material for severe service conditions.
High Temperature Performance
Hastelloy C-276 maintains good mechanical strength and oxidation resistance at elevated temperatures.
Benefits include:
- Stable microstructure at high temperatures
- Good creep resistance
- Resistance to thermal fatigue
- Excellent oxidation resistance
Typical service temperatures can exceed 1000°F (538°C), depending on the operating environment.
Available Forms
J&A Alloy supplies Hastelloy C-276 in the following product forms:
- Seamless Pipe
- Welded Pipe
- Seamless Tube
- Welded Tube
- Plate
- Sheet
- Coil
- Round Bar
- Flat Bar
- Hex Bar
- Wire
- Pipe Fittings
- Flanges
- Forgings
Custom dimensions are available upon request.
Applications of Hastelloy C-276
Chemical Processing
Reactors, heat exchangers, pressure vessels and transfer piping.
Oil & Gas
Sour gas systems, offshore platforms and subsea equipment.
Pollution Control
FGD scrubbers, stack liners and waste treatment systems.
Pharmaceutical Industry
Process equipment requiring high purity and corrosion resistance.
Marine Engineering
Seawater handling equipment and desalination systems.
Hastelloy C-276 vs Hastelloy C-22
| Property | Hastelloy C-276 | Hastelloy C-22 |
|---|---|---|
| UNS Number | N10276 | N06022 |
| Werkstoff Number | 2.4819 | 2.4602 |
| Chromium Content | 14.5–16.5% | 20–22.5% |
| Molybdenum Content | 15–17% | 12.5–14.5% |
| Oxidizing Environment | Excellent | Outstanding |
| Reducing Environment | Outstanding | Excellent |
| Pitting Resistance | Excellent | Outstanding |
| Crevice Corrosion Resistance | Excellent | Outstanding |
| Typical Applications | Chemical Processing, FGD, Oil & Gas | Mixed Acid Service, Pharmaceuticals |
| Best Choice For | Broad Corrosion Resistance | Severe Oxidizing Conditions |
Both alloys offer outstanding corrosion resistance.
Choose Hastelloy C-276 when:
- Reducing environments dominate
- Broad-spectrum corrosion resistance is required
- Hydrochloric acid resistance is critical
Choose Hastelloy C-22 when:
- Strong oxidizing media are present
- Maximum pitting resistance is required
- Mixed acid environments are involved
Welding & Fabrication
Hastelloy C-276 exhibits excellent weldability using conventional welding methods.
Suitable welding processes include:
- GTAW (TIG)
- GMAW (MIG)
- SMAW
- SAW
Advantages:
- No post-weld heat treatment normally required
- Excellent resistance in weld zones
- Low risk of sensitization
- Good fabrication characteristics
Proper cleaning before and after welding is recommended to maintain optimum corrosion resistance
Relevant Standards
- ASTM B575
- ASTM B619
- ASTM B622
- ASTM B626
- ASTM B366
- ASME SB575
- ASME SB619
- ASME SB622
Equivalent Grades
- Hastelloy C-276
- Alloy C276
- UNS N10276
- W.Nr. 2.4819
Frequently Asked Questions
What is Hastelloy C-276 used for?
Hastelloy C-276 is widely used in chemical processing, pollution control, marine engineering, oil & gas and pharmaceutical industries.
Is Hastelloy C-276 resistant to hydrochloric acid?
Yes. Hastelloy C-276 offers excellent resistance to hydrochloric acid across a broad range of concentrations and temperatures.
Can Hastelloy C-276 be welded?
Yes. Hastelloy C-276 has excellent weldability and generally does not require post-weld heat treatment.
What is the difference between Hastelloy C-276 and C-22?
C-276 provides broader resistance in reducing environments, while C-22 offers enhanced performance in strongly oxidizing media.
Is Hastelloy C-276 suitable for seawater service?
Yes. The alloy provides outstanding resistance to seawater corrosion, pitting and crevice attack.
What forms are available from J&A Alloy?
We supply pipe, tube, plate, sheet, bar, wire, fittings, flanges, and forgings.
Why Choose J&A Alloy
As a professional supplier of nickel alloys and corrosion-resistant materials, J&A Alloy provides high-quality Hastelloy C-276 products to customers worldwide.
Our Advantages
✓ ASTM / ASME compliant materials
✓ Full PMI and material traceability
✓ Third-party inspection available
✓ Competitive factory-direct pricing
✓ Fast global delivery
✓ Customized dimensions and specifications
✓ Experienced export and technical support team
Whether you require Hastelloy C-276 pipe, tube, plate, sheet, bar or custom forgings, J&A Alloy can provide reliable material solutions for the most demanding corrosion-resistant applications.
