incoloy 800 VS 825 Alloy
What is the equivalent material of incoloy 800?
Incoloy 800 is an alloy composed of nickel, chromium and iron, which has excellent strength and is resistant to oxidation and carburization in high temperature environments.
What is the difference between incoloy 800 and 825
Incoloy 825 has a maximum operating temperature of 540°C, while Incoloy 800 can withstand temperatures up to 1100°C. Therefore, if your project requires an alloy that can withstand extremely high temperatures, Incoloy 800 is a better choice.
What is the difference between Inconel 625 and 825 Alloy?
Inconel 625 is often used in sour gas service due to its good resistance to stress corrosion cracking and pitting, while incoloy 825 is often used in crude oil service due to its good corrosion resistance in sour environments.
What is the difference between Inconel 625 and 800?
Inconel 625 has high corrosion fatigue strength, tensile strength, and resistance to chloride stress corrosion cracking. The advantage of incoloy 800 alloy is that it is more resistant to various types of corrosion.
Incoloy 800 vs 825 Alloy – What's the Difference?
The choice between Incoloy 800 and Inconel 825 alloys depends on a variety of factors, including chemical composition, mechanical properties, and cost. Below, we will analyze their main differences:
Chemical Composition: Incoloy 800 vs 825 Alloy
| Element | Incoloy 800 | Incoloy 825 |
|---|---|---|
| Ni | 30–35% | 38–46% |
| Cr | 19–23% | 19.5–23.5% |
| Fe | Balance | Balance |
| Mo | – | 2.5–3.5% |
| Cu | – | 1.5–3% |
| Ti | ≤ 0.6% | 0.6–1.2% |
| C | ≤ 0.10% | ≤ 0.05% |
| Si | ≤ 1.0% | ≤ 0.5% |
| Mn | ≤ 1.5% | ≤ 1.0% |
Mechanical Behavior: Incoloy 800 vs 825 Alloy
| Property | Incoloy 800 | Incoloy 825 |
|---|---|---|
| Tensile Strength | ≥ 450 MPa | ≥ 550 MPa |
| Yield Strength | ≥ 170 MPa | ≥ 220 MPa |
| Elongation | ≥ 30% | ≥ 30% |
| Hardness (Rockwell) | B85–B90 | B88–B93 |
Physical Properties: Incoloy 800 vs 825 Alloy
| Property | Incoloy 800 | Incoloy 825 |
|---|---|---|
| Density | 7.94 g/cm³ | 7.94 g/cm³ |
| Melting Range | 1357–1385°C | 1370–1400°C |
| Thermal Conductivity | 11.2 W/m·K (at 100°C) | 11.1 W/m·K (at 100°C) |
| Specific Heat Capacity | ~502 J/kg·K | ~460 J/kg·K |
| Electrical Resistivity | 0.98 μΩ·m | 1.03 μΩ·m |
Application
Incoloy 800: Ideal for high temperature industrial applications such as heat exchangers and furnace components.
Incoloy 825: Suitable for use in chemical processing, pollution control and environments where acid resistance is critical.
Heat Resistance
Incoloy 800 is designed for high temperature applications and can withstand temperatures up to 1100° C. Incoloy 825 can withstand high temperatures but is more known for its corrosion resistance.
Corrosion Resistance
Due to the presence of molybdenum and copper, Incoloy 825 performs better than Incoloy 800 in environments containing reducing agents such as sulfuric and phosphoric acids.
Which is Better? Incoloy 800 vs 825 Alloy
The choice between Incoloy 800 and 825 depends on your application needs:
For high temperature, structural integrity-critical applications, choose Incoloy 800.
In environments with corrosive media, especially acidic media, choose Incoloy 825.
