The differences between Inconel 625 (also known as nickel-based alloy 625) and other alloys are mainly reflected in the following aspects:
1. Chemical composition
Inconel 625: The main components are nickel (Ni) and chromium (Cr), accounting for about 58% and 21% of the alloy respectively. In addition, it also contains elements such as molybdenum (Mo), aluminum (Al), and titanium (Ti). The addition of these elements makes Inconel 625 have excellent corrosion resistance and high temperature strength.
Other alloys: For example, Inconel 718 contains a higher proportion of chromium and aluminum to provide higher oxidation resistance; while Hastelloy C276 has stronger resistance to specific corrosive media.
2. Corrosion resistance
Inconel 625: It has excellent corrosion resistance in various corrosive media, including acidic and alkaline solutions, chlorides, sulfuric acid, salt water and seawater.
Other alloys: For example, Hastelloy C276 is more popular in extreme corrosive environments because it has stronger resistance to specific corrosive media.
3. Oxidation resistance
Inconel 625: It exhibits excellent oxidation resistance at high temperatures and can operate for a long time in an oxidizing environment without oxidation.
Other alloys: For example, Inconel 718 is more resistant to oxidizing environments, so it is more widely used in high-temperature oxidizing environments such as combustion chambers.
4. Mechanical properties
Inconel 625: It has excellent strength and hardness, as well as good tensile strength and torsional strength, and can withstand large forces and pressures in high-temperature environments.
Other alloys: For example, the mechanical properties of Inconel X-750 at high temperatures may be different from those of Inconel 625, depending on the composition and heat treatment process of the alloy.
5. Welding performance
Inconel 625: It has good welding performance, is easy to weld with other materials, and has good joint performance after welding.
Other alloys: Alloys such as Hastelloy C22 may require more welding techniques and precautions to ensure the quality and performance of the welded joints.
6. Application fields
Inconel 625: It is widely used in aerospace, petrochemical, nuclear industry, medical equipment, marine engineering and other fields. Its excellent comprehensive performance makes it the material of choice for many key components in these fields.
Other alloys: Hastelloy C276 is more suitable for strong acid environments such as sulfuric acid; Inconel 718 has advantages in aircraft engine components.
7. Price and processing difficulty
Inconel 625: Because its material composition contains precious elements such as nickel and chromium, the price is relatively high. At the same time, its processing is difficult and requires the use of special equipment and processes, which increases production costs and process complexity.
Other alloys: The price and processing difficulty vary depending on the type of alloy, but are generally more economical or easier to process than Inconel 625.
