SSM provides Hastelloy C276 products, including pipes, fittings, flanges, fasteners, plates, and bars, ensuring reliable performance in corrosive and high-temperature environments.
Hastelloy C276 is widely used in industries requiring high resistance to corrosion and robust mechanical properties in challenging environments.
What is Hastelloy C276 material?
Hastelloy is a nickel-based superalloy containing more than 50% nickel and significant amounts of molybdenum and chromium. Hastelloy C-276 also contains small amounts of cobalt, tungsten, and manganese. It is a versatile and reliable material chosen for its ability to withstand extreme conditions, particularly in environments involving corrosive chemicals and high temperatures.
History of Hastelloy C276
Hastelloy is a trademark of Haynes International, a company known for producing high-performance alloys. The development of the Hastelloy range began in the 1920s with the introduction of the Hastelloy B alloy, which is acclaimed for its resistance to hydrochloric acid.
Decades of research and development in nickel-molybdenum-chromium alloys eventually led to the creation of the Hastelloy C series. These alloys are designed to offer extended corrosion resistance in both oxidizing and reducing environments.
Hastelloy C-276, introduced as an improved version of the previous alloy, is specially formulated to resist corrosion in both oxidizing and reducing environments. The addition of tungsten further enhances its resistance to localized corrosion, such as pitting and crevice corrosion.
Continuous improvements and research over the years have further refined the production process and applications of Hastelloy C-276. This product represents the culmination of decades of research and development in nickel-based alloys and continues to serve as the industry benchmark for corrosion-resistant materials. Its development marks an important milestone in metallurgy and materials engineering, providing industries with reliable and durable solutions for extreme environments.
Hastelloy C276 Key Characteristics
Hastelloy C276 is a high-performance nickel-molybdenum-chromium alloy with the following notable properties:
- Exceptional Corrosion Resistance
- Resistance to Pitting and Crevice Corrosion
- Excellent Mechanical Properties
- High-Temperature Oxidation Resistance
- Ease of Fabrication and Welding
The two graphs to the right show the corrosion rate of 0.1 mm per year for different corrosion-resistant alloys. For instance, you can observe that 12% concentrated hydrochloric acid needs to be heated to around 30°C to corrode 0.1 mm of Hastelloy C-276 in one year. In contrast, at a temperature of less than 20°C, the same acid will corrode 0.1 mm of Inconel 625.
References and Further Reading：
Temperature – hydrochloric acid concentration dependence for different alloys
Temperature – sulfuric acid concentration dependence for different alloys
Equivalent Materials for Hastelloy C276
| Standard | UNS | DIN | WERKSTOFF NR. | ASTM | ASME | ISO | EN | AFNOR | JIS | BS |
| Equivalent Material | N10276 | 2.4819 | 2.4819 | B575, B564, B622, B619, B626 | SB-575, SB-564, SB-622, SB-619, SB-626 | 6208 | NiMo16Cr15W | NC17D | NW 0276 | N10276 |
Hastelloy C276 Chemical Composition
| Element | Nickel (Ni) | Molybdenum (Mo) | Chromium (Cr) | Iron (Fe) | Tungsten (W) | Cobalt (Co) | Manganese (Mn) | Vanadium (V) | Silicon (Si) | Carbon (C) | Phosphorus (P) | Sulfur (S) |
| Composition (%) | 57.0 (Min) | 15.0 – 17.0 | 14.5 – 16.5 | 4.0 – 7.0 | 3.0 – 4.5 | 2.5 (Max) | 1.0 (Max) | 0.35 (Max) | 0.08 (Max) | 0.01 (Max) | 0.04 (Max) | 0.03 (Max) |
Hastelloy C276 Physical &Mechanical Properties
Hastelloy C276 Physical Properties
- Density: 8.89 g/cm³ (0.321 lb/in³)
- Melting Point: 1370–1390°C (2500–2530°F)
- Thermal Conductivity: 10.0 W/m·K at 20°C
- Specific Heat Capacity: 410 J/kg·K at 20°C
- Electrical Resistivity: 1.23 µΩ·m at 20°C
- Coefficient of Thermal Expansion: 11.2 µm/m·K (20-100°C)
- Modulus of Elasticity: 205 GPa (29.7 x 10³ ksi)
Tensile properties of Hastelloy C-276
Load deformation curves during compression of Hastelloy C-276
Hastelloy C276 Mechanical Properties
- Tensile Strength: 690 MPa (100 ksi)
- Yield Strength (0.2% offset): 283 MPa (41 ksi)
- Elongation: 40% (in 2 inches or 50.8 mm)
- Hardness: Typically around 200 Brinell
Application of Hastelloy C276
Hastelloy C276 is a high-performance nickel-molybdenum-chromium alloy with the following notable properties:
- Chemical Processing Industry
- Chemical Processing Industry
- Oil and Gas Industry
- Pollution Control Equipment
Types of Hastelloy C276
The types of products provided by SSM include:
- Hastelloy C276 Pipes
- Hastelloy C276 Pipe Fittings
- Hastelloy C276 Flanges
- Hastelloy C276 Fasteners
- Hastelloy C276 Plates
- Hastelloy C276 Bars
What is the difference between Hastelloy C22 and Hastelloy C-276?
Hastelloy C22 and Hastelloy C-276 are both corrosion-resistant and high-temperature materials suitable for demanding environments. Hastelloy C22 is ideal for moderate corrosion and lower temperature applications, with higher yield strength and ductility. At the same time, Hastelloy C-276 performs better in extreme corrosion and high-temperature conditions, with higher tensile strength and high-temperature resistance. Depending on the specific application’s requirements, such as temperature range and corrosive environment, the appropriate material can be selected.
References and Further Reading：
