If you are sourcing high-performance nickel-based alloys for demanding industrial applications, understanding the differences between Inconel 625 and Incoloy 825 is crucial. Both alloys offer excellent corrosion resistance and mechanical properties, but their composition, applications, and cost vary significantly. This guide provides an in-depth comparison to help procurement professionals make informed decisions.
Inconel 625 is a nickel-chromium-molybdenum alloy known for exceptional strength and oxidation resistance at high temperatures. It is widely used in aerospace, chemical processing, and marine applications where extreme corrosion and high-temperature stability are required.
Incoloy 825 is a nickel-iron-chromium alloy with added molybdenum and copper. It is designed to resist a wide range of chemical corrosions, including reducing and oxidizing agents, making it ideal for chemical, petrochemical, and nuclear industries.
inconel 625 vs incoloy 825:Comparison
| Aspect | Inconel 625 | Incoloy 825 |
|---|---|---|
| Nickel Content (%) | 58 min | 38–46 |
| Chromium (%) | 20–23 | 19.5–23.5 |
| Molybdenum (%) | 8–10 | 2.5–3.5 |
| Iron (%) | 5 max | 22 min |
| Copper (%) | - | 1.5–3.0 |
| Titanium (%) | - | 0.6–1.2 |
| Inconel 625 | Incoloy 825 | |
|---|---|---|
| Tensile Strenght (MPa) |
827 | 586 |
| Yield Strenght (MPa) |
414 | 241 |
| Inconel 625 | Incoloy 825 | |
|---|---|---|
| Density, g/cm³ | 8.44 | 8.14 |
| Density, lb/in.³ | 0.305 | 0.294 |
| Melting Range, °F | 2350-2460 | 2500-2550 |
| Melting Range, °C | 1290-1350 | 1370-1400 |
| Permeability at 200 oersted (15.9 kA/m) | 1.0006 | 1.005 |
| Curie Temperature, °F | <-320 | <-320 |
| Curie Temperature, °C | -196 | <-196 |
inconel 625 vs incoloy 825:Corrosion Resistance Comparison
| Alloy | Corrosion Type | Performance |
|---|---|---|
| Inconel 625 | Oxidation at high temperatures | Excellent |
| Pitting and crevice corrosion | Excellent | |
| Chloride-induced corrosion | Excellent | |
| Incoloy 825 | Sulfuric, phosphoric, hydrochloric acids | Excellent |
| Chloride stress corrosion cracking | Good | |
| Oxidizing environments | Good |
inconel 625 vs incoloy 825: Applications
| Alloy | Typical Industries | Key Applications |
|---|---|---|
| Inconel 625 | Aerospace, marine, chemical | Gas turbines, heat exchangers, reactor components, subsea equipment |
| Incoloy 825 | Chemical, petrochemical, nuclear | Pressure vessels, chemical tanks, heat exchangers, seawater piping |
inconel 625 vs incoloy 825: Price
Inconel 625 is generally more expensive due to its high nickel and molybdenum content, ranging from $35–50 per kg (depending on form and market).
Incoloy 825 is moderately priced, typically $25–40 per kg, and is widely available in plates, sheets, tubes, and bars.
What forms are available for Inconel 625 and Incoloy 825?
Both Inconel 625 and Incoloy 825 alloys are available in forms such as plates, bars, tubes, and welded components.
Are Inconel 625 and Incoloy 825 alloys suitable for chemical storage tanks?
Unless there are specific requirements for high temperature or chloride corrosion resistance, Incoloy 825 is generally more suitable and cost-effective for chemical storage tanks.
who choose us?
To better serve international buyers, GNEE offers flexible payment methods, including T/T (30% down payment, 70% before shipment), sight letter of credit (L/C), and DP/DA payment options for long-term partners; uses seaworthy wooden crates or pallets for packaging, providing moisture-proof, rust-proof, and edge protection measures, and clearly marking the heat number and dimensions on the plates; guarantees efficient delivery, with in-stock Alloy 625 plates shipped within 7-10 days and custom sizes within 15-25 days; provides complete factory test certificates (MTC 3.1), and boasts extensive global export experience covering the Middle East, Europe, the United States, and Southeast Asia.
one-stop solution
professional team
high quality
