What are the differences between Inconel 601 and Inconel 625?
Inconel 601, with its added aluminum content, exhibits excellent high-temperature oxidation resistance, making it ideal for furnace components and heat exchangers. Inconel 625, due to its higher chromium, molybdenum, and niobium content, possesses superior overall corrosion resistance, especially in harsh/marine environments, and is therefore more suitable for chemical, aerospace, and marine components, although it is typically more expensive. The advantage of 601 lies in its thermal stability and resistance to scale formation, while 625 offers superior strength and resistance to pitting and crevice corrosion.
Is Inconel 601 magnetic?
Inconel 601 sheet is a non-magnetic nickel-chromium alloy. Its properties include high-temperature strength comparable to 18-8 alloys and high corrosion resistance to organic and inorganic corrosive agents. 601 alloy sheet performs exceptionally well in temperature ranges from cryogenic temperatures up to 2000°F.
Inconel 601 sheet is a nickel-chromium alloy with excellent oxidation resistance, up to 2200°F. Even under extreme temperature cycling, the 601 alloy forms a strongly adherent oxide layer that resists spalling. This alloy exhibits good high-temperature strength and maintains its ductility even after prolonged use. This is due to its high corrosion and heat resistance.
Inconel 625 sheet is a nickel alloy with exceptional corrosion resistance and a high-toughness, strengthened alloy matrix. It is a corrosion-resistant alloy that also exhibits resistivity that varies with temperature. Inconel 625 sheet is a non-magnetic, corrosion-resistant, and oxidation-resistant nickel-based alloy. The excellent strength and toughness of Alloy 625 in this temperature range are attributed to the solid solution strengthening effect of the refractory elements niobium and molybdenum in the nickel-chromium matrix.
inconel 601 & inconel 625 plate Chemical Composition
| Element | Inconel 601 | Inconel 625 |
|---|---|---|
| Nickel (Ni) | 58-63% | 58-72% |
| Chromium (Cr) | 21-25% | 20-23% |
| Iron (Fe) | Balance | Balance |
| Molybdenum (Mo) | None | 8-10% |
| Niobium (Nb) | None | 3.15-4.15% |
| Carbon (C) | ≤0.10% | ≤0.10% |
| Aluminum (Al) | 1.0-1.5% | None |
inconel 601 & inconel 625 plate Mechanical Properties
| Property | Inconel 601 Plate | Inconel 625 Plate |
|---|---|---|
| Yield Strength (MPa) | 250 – 450 | 200 – 310 |
| Ultimate Tensile Strength (MPa) | 550 – 750 | 450 – 700 |
| Elongation (%) | 30% (min) | 30% (min) |
| Hardness (Rockwell B) | 85-95 | 85-100 |
High-Temperature Performance
| Feature | Inconel 601 Plate | Inconel 625 Plate |
|---|---|---|
| Service Temperature | Up to 2,100°F (1,149°C) | Up to 1,900°F (1,038°C) |
| Oxidation Resistance | Excellent | Excellent |
| Creep Resistance | Good | Very good |
Corrosion Resistance
| Corrosion Type | Inconel 601 Plate | Inconel 625 Plate |
|---|---|---|
| General Corrosion | Very good | Excellent |
| Pitting Corrosion | Good | Excellent |
| Stress Corrosion Cracking | Excellent | Excellent |
| Acid Resistance | Good in certain acids | Excellent in a broader range |
Typical Applications
| Application Area | Inconel 601 Plate | Inconel 625 Plate |
|---|---|---|
| Chemical Processing | Reaction vessels, heat exchangers | Equipment in chemical processing |
| Aerospace | Jet engine components | Aircraft engines and components |
| Oil and Gas Industry | Pipelines, valves | Offshore and downhole applications |
| Power Generation | Gas turbines | Heat exchangers and components |
| Industrial Furnaces | Furnace components | High-temperature furnace environments |
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 inconel 601 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 inconel 601 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 inconel 601, 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.
