Monel 400 and Inconel 625
What is the difference between Monel 400 and Inconel 625?
The difference is that Monel 400 does not have very effective solid solution strengthening elements, and its strength is relatively limited; Inconel 625 adds two very effective solid solution strengthening elements to obtain higher strength, namely molybdenum and niobium.
What is the difference between Monel 400 and C276?
Monel Alloy 400 relies heavily on the addition of copper to its composition, while Hastelloy C276 incorporates molybdenum, chromium and tungsten to provide greater solid solution strengthening, resulting in higher tensile strength.
What is the difference between Inconel 625 and hastelloy C276?
Inconel 625 and Hastelloy C-276 are both nickel-chromium-molybdenum based alloys. They both have excellent corrosion resistance and good strength. In comparison, Inconel 625 has a higher chromium content, while Hastelloy C-276 has a higher molybdenum content.
What is Inconel 625 used for?
Some applications requiring the combination of strength and corrosion resistance offered by INCONEL alloy 625 are bubble caps, tubing, reaction vessels, distillation columns, heat exchangers, transfer piping, and valves.
Comparison: Inconel 625 vs Monel 400
| Property | Inconel 625 | Monel 400 |
|---|---|---|
| Composition | Primarily Nickel (58-70%), Chromium (20-23%), Molybdenum (8-10%), and Iron | Nickel (63%), Copper (28-34%), Iron, Manganese, and Silicon |
| Corrosion Resistance | Excellent in high-temperature and corrosive environments, especially in sulfuric and seawater environments | Excellent seawater and acidic corrosion resistance, but less resistant to high temperatures than Inconel 625 |
| High-Temperature Resistance | Very high (up to 1,800°F / 982°C) due to high amounts of chromium and molybdenum | Moderate (up to 1,000°F / 537°C), suitable for lower-temperature applications compared to Inconel 625 |
| Strength at High Temperatures | Very strong at elevated temperatures, ideal for high-stress applications | Strong at room temperature, but not as strong at elevated temperatures as Inconel 625 |
| Weldability | Excellent weldability, often used in welded assemblies | Good weldability, though susceptible to stress corrosion cracking in some conditions |
| Magnetic Properties | Non-magnetic | Non-magnetic |
| Applications | Aerospace, nuclear reactors, chemical processing, marine environments, and high-temperature components | Marine environments, chemical processing, heat exchangers, pumps, and valves in seawater and chemical industries |
| Price | Generally more expensive due to higher alloy content (Ni-Cr-Mo) | More affordable compared to Inconel 625 due to its nickel-copper composition |
Conclusion
Gnee Steel is a supplier of Monel 400 And Inconel 625, with products covering tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extruded profiles. We work with steel mills to provide customers with 625 alloy, and its products meet or exceed many leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN and BS standards.
Gnee Steel stocks and sells Monel 400 And Inconel 625 tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extruded profiles. You are welcome to contact us for a quote at any time at ss@gneesteel.com
