Inconel 625 VS incoloy 825
Is Inconel 718 alloy non-magnetic?
Inconel 718 (UNS N07718, DIN 2.4375) is a widely used nickel-based alloy with a large number of alloying additives. As a nickel-based alloy, it is virtually non-magnetic.
What is the difference between Inconel 625 and 825?
Inconel 625 is often used in sour gas service due to its good resistance to stress corrosion cracking and pitting, while Inconel 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 Inconel 750?
Both Inconel 750 and Inconel 625 are known for their good high temperature performance. However, Inconel 750 has a slightly higher temperature resistance than Inconel 625. Inconel 750 can be used at temperatures up to 760°C (1,400°F), while Inconel 625 can typically be used at temperatures up to 538°C (1,000°F).
What is the difference between Inconel 800 and Inconel 625?
These material grades have lower nickel content compared to Inconel 625. These Inconels are resistant to oxidation, carburization, and high temperature corrosion. Inconel 800 is known for its high carbon content, high creep and rupture properties compared to Inconel 625 alloy.
Inconel 625 and 825 Alloy Specifications
| Alloy 825 | Alloy 625 | |
|---|---|---|
| Material | nickel-iron-chromium alloy 825 | nickel-chromium alloy 625 |
| Equivalent | W.Nr. 2.4858 UNS N08825 |
W.Nr. 2.4856 UNS N06625 |
| Density | 0.294 lb/cu in | 0.305 lb/cu in |
| Melting Range | 1370-1400°C | 1290-1350°C |
| Curie Temperature | <-196°C | -196°C |
| Thermal Conductivity | 76.8 Btu • in/ft2•h•°F 11.1 W/m •°C. |
68 Btu • in/ft2•h•°F 9.8 W/m •°C. |
Inconel 625 vs Incoloy 825 Chemical Composition
| Element | Incoloy 825 | Inconel 625 |
|---|---|---|
| C | ≤ 0.05% | ≤ 0.08% |
| Mn | ≤ 1% | ≤ 0.35% |
| Fe | ≥ 22% | rest |
| P | Not specified | Not specified |
| S | ≤ 0.03% | ≤ 0.015% |
| Si | ≤ 0.5% | ≤ 0.35% |
| Cu | 1.5–3% | ≤ 0.3% |
| Ni | 38–46% | 50–55% |
| Co | Not specified | ≤ 10% |
| Al | ≤ 0.2% | ≤ 0.8% |
| Ti | 0.6–1.2% | ≤ 1.15% |
| Cr | 19.5–23.5% | 17–21% |
| Nb+Ta | Not specified | 4.75–5.5% |
| Mo | 2.5–3.5% | 2.8–3.3% |
| B | Not specified | Not specified |
Alloy 825 vs Alloy 625 Applications
| Inconel Alloy 625 |
Engine Exhaust Systems Sea-water Applications Aircraft Ducting Systems Thrust-reverser Systems Distillation Columns Heat-exchanger And Boilers Seals Springs Bellows |
| Incoloy Alloy 825 |
Chemical Processing Acid Production Nuclear Fuel Reprocessing Oil And Gas Recovery Pickling Operations |
Incoloy 825 vs Inconel 625 Specification
| Incoloy 825 | Inconel 625 | Inconel 625LCF | |
|---|---|---|---|
| Products & Form | Pipe, tubing, sheet, plate, strip, round bar, flat bar, hexagon bars, forging stock and wire | Pipe, tubing, sheet, plate, strip, round bars, hexagon bar, flat bar, forging stock, extruded section and wire | Sheet and Strip |
| Werkstoff Nr. | 2.4858 | 2.4856 | 2.4856 |
| UNS | UNS N08825 | UNS N06625 | UNS N06625, N06626 |
| ASTM | ASTM B163, B423, B425, B366, B564, B751, B775, B829, B704, B705 | ASTM B443, B444, B564, B366, B446, B829, B704, B705, B751, B775 | ASTM B443 |
| ASME | SB 163, SB 366, SB 829, SB 423, SB 425, SB 564, SB 705, SB 704, SB 751, SB 775 | SB 446, SB 564, SB 366, SB 829 SB 443, SB 444, SB 704, SB 705, SB 775, SB 751, | SB 443 |
| AMS | - | AMS 5581, 5666, 5599, 5837, 5869 | AMS 5879 |
| BS British Standards | BS 3072 - BS 3074, BS 3076 (NA16) | BS 3072, 3074, 3076 (NA21) | BS 3072 (NA21) |
| DIN Standards | DIN 17744, DIN 17750 - 17754 | DIN 17744, DIN 17750 - 17754 | - |
| NACE | NACE MR-0175, VdTÜV 432, ISO 15156 | NACE MR-0175, VdTÜV 499, ISO 15156, EN 10095 | - |
| ISO Standards | ISO 6207, ISO 6208, 9723 - 9725 | ISO NW6625, ISO 6207, ISO 6208, 9723 - 9725, 4955A | - |
Conclusion
Whether you need an alloy for chemical processing or aerospace component manufacturing, Incoloy 825 or Inconel 625 can provide the perfect solution for your needs. Each alloy has different advantages that make it ideal for specific applications - so be sure to do your research before deciding which alloy is right for your project! Incoloy 825 has excellent weldability, while Inconel 625 has superior fatigue strength - both can be perfect solutions, depending on your specific job!
