High-performance alloy material for industrial engineering and critical application conditions.
1. Introduction to Hastelloy C276 Materials
Hastelloy C-276 is a universal corrosion-resistant alloy with ultra-low silicon and carbon content. It provides outstanding resistance to wet chlorine, various oxidizing chlorides, chloride brines, sulfuric acid and oxidizing salts, and performs well in low & medium temperature hydrochloric acid. Over the past 30 years, it has been widely used in harsh corrosive industrial fields including chemical, petrochemical, flue gas desulfurization, pulp & paper and environmental protection industries.
2. Chemical composition of Hastelloy C276
| Alloy | Limit | Ni | Cr | Fe | Mo | W | Co | C | Mn | Si | S | P | V |
| Hastelloy C-276 | Minimum | Bal | 14.5 | 4 | 15 | 3 | – | – | – | – | – | – | 0.1 |
| Maximum | 16.5 | 7 | 17 | 4.5 | 2.5 | 0.01 | 1 | 0.08 | 0.001 | 0.015 | 0.3 |
3. Hastelloy C276 physical properties
| Density(g/cm³) | Melting point(℃) | Thermal conductivity(W/m·℃) | Specific heat capacity(J/kg·℃) | Elastic modulus(GPa) | Shear modulus(GPa) | Resistivity(μΩ·m) | Linear expansion coefficient(10⁻⁶/℃) |
| 8.9 | 1325-1370 | 10.2(100℃) | 407 | 208 | 79 | 1.25 | 11.7(20~100℃) |
Minimum room temperature mechanical properties of the alloy:
| Alloy state | Tensile strength Rm N/mm² | Yield strength RP0.2 N/mm² | Elongation A5 % | Brinell hardness HB |
| Solid solution treated | 730 | 363 | 30 | ≤100 |
4. Hastelloy C276 material characteristics
Excellent corrosion resistance to most corrosive media under both oxidizing and reducing conditions.
Superior resistance to pitting corrosion, crevice corrosion and stress corrosion cracking.
Metallographic structure of Hastelloy C-276: C276 possesses a face-centered cubic lattice structure.
5. Hastelloy C-276 corrosion resistance
C-276 is applicable to various chemical processes with both oxidizing and reducing media. Elevated molybdenum and chromium content delivers chloride corrosion resistance, while tungsten further improves anti-corrosion performance. It is one of few materials resistant to wet chlorine, hypochlorite and chlorine dioxide solutions, with remarkable tolerance to high-concentration chloride salt solutions such as ferric chloride and cupric chloride.
6. Hastelloy C276 application field
