Performance comparison between Alloy 825 and Alloy 625
Performance comparison between Alloy 825 and Alloy 625
Alloy 625 exhibits superior mechanical strength and high-temperature performance, while alloy 825 demonstrates excellent corrosion resistance to certain acids and chlorides at moderate temperatures. Alloy 625 is better suited for high-stress, high-temperature applications such as aerospace and power generation, while alloy 825 is an economical choice for less demanding chemical processing and oil/gas environments.
What is Inconel 625 used for?
Inconel 625 has excellent weldability and formability, so it is often processed into pipes, plates, flanges, and bars, making it an ideal material for applications such as offshore pipeline systems, heat exchangers, chemical transport pipelines, and gas turbine pipeline systems.
Difference Between Inconel 625 and 825
Compared to Alloy 825, Alloy 625 is renowned for its superior corrosion resistance in marine applications. Understanding the differences between Inconel and Incoloy is crucial before installation in seawater and high-temperature environments.
| 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 Composition
| Inconel | Element (% by mass) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ni | Cr | Fe | Mo | Nb | Co | Mn | Cu | Al | Ti | Si | C | S | P | B | |
| 625 | 58.0 | 20.0–23.0 | 5.0 | 8.0–10.0 | 3.15–4.15 | 1.0 | 0.5 | 0.4 | 0.4 | 0.5 | 0.1 | 0.015 | 0.015 | ||
Inconel 825 Composition
| Grade | Ni | Cr | Fe | Mb | Ti | Cu | Mn | C | S | Al | Si |
| Incoloy 825 | 38.0 – 46.0 | 19.5 – 23.5 | 22.0 min | 2.5 – 3.5 | 0.6 – 1.2 | 1.5 – 3.0 | 1.0 max | 0.05 max | 0.03 max | 0.2 max | 0.5 max |
Tensile and Yield Strength Difference Between Inconel 625 and 825
| Alloy 825 (Ksi (MPa)) |
Alloy 625 (Ksi (MPa)) |
|
|---|---|---|
| Annealed Tubing | 112 (772) | 120-140 (827-965) |
| Annealed Bar | 100 (690) | 120-150 (827-1034) |
| Annealed Plate | 96 (662) | 120-150 (827-1034) |
| Annealed Sheet | 110 (758) | 120-150 (827-1034) |
Alloy 825 vs Alloy 625 Applications and Uses
| 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 |
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
📦 Packaging and Shipping
All stainless steel products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Steel is a supplier of GH4169 alloy, offering a wide range of products including: seamless pipe (sizes: 4-219 mm; thickness: 0.5-20 mm); welded pipe (sizes: 5.0-1219.2 mm; thickness: 0.5-20 mm); plates (thickness: 0.1 to 100 mm; width: 10-2500 mm); strips; alloy round bars (diameter: 3-800 mm); flat bars (thickness: 2-100 mm; width: 10-500 mm); hexagonal bars (size: 2-100 mm); wire rods; and extruded profiles. We collaborate with steel mills to provide our customers with GH4169 alloy products that meet or exceed numerous leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN, and BS standards.
Gnee Steel stocks and sells GH4169, pipes, plates, strips, round bars, flat bars, forged billets, hexagonal steel, wire rods, and extruded profiles. Please feel free to contact us at ss@gneesteel.com for a quote.
