Hastelloy X and Hastelloy C276 are both commonly used nickel based high-temperature alloys, widely used in aerospace, petrochemical and other fields. However, their design focuses are different. HT PIPE is a Hastelloy X and Hastelloy C276 material supplier with 15+ export experience. Contact us for more information and quotes for free!
alloy x and alloy c276 Chemical composition comparison
|
Composition (Mass Fraction) |
Hastelloy X |
Hastelloy C276 |
|
Nickel (Ni) |
47.0%-50.0% |
54.0%-65.0% |
|
Chromium (Cr) |
21.0%-23.5% |
14.5%-16.5% |
|
Iron (Fe) |
17.0%-20.0% |
4.0%-7.0% |
|
Molybdenum (Mo) |
8.0%-10.0% |
15.0%-17.0% |
|
Cobalt (Co) |
0.5%-2.5% |
≤2.5% |
|
Tungsten (W) |
None |
3.0%-4.5% |
|
Carbon (C) |
≤0.10% |
≤0.01% |
hastelloy x and hastelloy c276 High temperature performance
Hastelloy X: Significant advantages, maintaining high tensile strength below 1200 ℃ (such as a tensile strength of about 200MPa at 1000 ℃), low coefficient of thermal expansion, strong thermal stability, suitable for long-term high-temperature conditions.
Hastelloy C276: Alloy c276 has weak high-temperature strength, with a significant decrease in strength above 1000 ℃ (such as a tensile strength of about 120MPa at 1000 ℃). It is mainly not resistant to high-temperature oxidation and is only suitable for corrosive environments ≤ 650 ℃.
alloy x and alloy c276 Corrosion resistance performance
Hastelloy X: Focuses on high temperature oxidation and sulfur-containing gas corrosion (such as SO ₂, H ₂ S), with moderate corrosion resistance to chlorine based media (such as concentrated hydrochloric acid and chlorine gas).
Hastelloy C276: It has more comprehensive corrosion resistance, especially resistant to strong oxidizing media (such as nitric acid, hypochlorite), chlorine based corrosion (such as wet chlorine gas, hydrochloric acid), and intergranular corrosion.
hastelloy n10276 and hast x Processing performance
Hastelloy X: There is no heat treatment required after argon arc welding. The deformation amount during cold processing can be slightly larger (≤ 15% per time), and excessive deformation only requires simple intermediate annealing (1050 ℃ -1100 ℃ air cooling).
Hastelloy C276: Welding is prone to producing hot cracks, and welding parameters need to be strictly controlled. After welding, solution treatment (1150 ℃ -1175 ℃ water cooling) is required. Cold work hardening is fast, with a single deformation of ≤ 10%, and a higher intermediate annealing temperature (1100 ℃ -1150 ℃).
Selection core suggestions
Select according to temperature requirements
- If the temperature used is ≥ 650 ℃ and high temperature resistance is required (such as high temperature structural components), Hastelloy X is preferred.
- If the temperature is ≤ 650 ℃ and corrosion resistance is emphasized (especially for chlorine based and oxidizing media), Hastelloy C276 should be selected.
Select according to corrosive medium
- When exposed to high-temperature sulfur-containing gases (such as engine gas and sulfurized bed reactors), Hastelloy X should be selected.
- Contact with strong corrosive media such as hydrochloric acid, chlorine gas, nitric acid, etc., choose Hastelloy C276.
Selection based on processing and cost
- To simplify welding, reduce heat treatment processes, or control costs, choose Hastelloy X.
- Acceptable complex processing techniques, with extremely high requirements for corrosion resistance, Hastelloy C276 (higher cost) is the best choice.
