Differences between Inconel 601 and Alloy 625 flanges
Inconel 601 flanges, with the addition of aluminum, offer excellent high-temperature oxidation resistance (up to 2200°F), making them ideal for furnace components. In contrast, Inconel 625 flanges, due to their molybdenum and niobium content, possess superior overall corrosion resistance and strength, making them ideal for demanding chemical, aerospace, and marine applications, despite their higher cost and greater processing difficulty. 601 flanges are suitable for high-temperature, less corrosive environments; 625 flanges are suitable for environments with extreme chemical corrosion and where high strength is required.
What are the uses of Inconel 601 alloy?
In industrial furnaces, this alloy is used for radiant tubes, muffles, reactors, flame shields, continuous annealing tubes, woven wire mesh conveyor belts, chain curtains, burner nozzles, and resistance heating elements.
Standard Specification For Inconel 601 / 625 Flanges
Specifications : ASTM B564 / ASME SB564
Dimensions : ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard : ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size : 1/2" (15 NB) to 48" (1200NB)
Class/Pressure : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
601 / 625 Inconel Flanges Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| Inconel 601 | 2.4851 | N06601 | NCF 601 | NA 49 | XH60BT | NC23FeA | NiCr23Fe |
| Inconel 625 | 2.4856 | N06625 | NCF 625 | NA 21 | ХН75МБТЮ | NC22DNB4M | NiCr22Mo9Nb |
Chemical Composition of Inconel 601 / 625 Flanges
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr | Al | Ti |
| Inconel 601 | 0.05 – 0.10 | 1.50 max | 1.00 max | 0.015 max | 0.75 max | 39.50 min | 30 – 35 | 19 – 23 | 0.15 – 0.60 | 0.15 – 0.60 |
| Inconel 625 | 0.06 – 0.10 | 1.50 max | 1.00 max | 0.015 max | 0.75 max | 39.50 min | 30 – 35 | 19 – 23 | 0.15 – 0.60 | 0.15 – 0.60 |
Mechanical Properties of Inconel 601 / 625 Flange
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Inconel 601 | 8.1 g/cm3 | 1411 °C (2571 °F) | Psi – 80,000 , MPa – 550 | Psi – 30,000 , MPa – 205 | 30 % |
| Inconel 625 | 8.4 g/cm3 | 1350 °C (2460 °F) | Psi – 1,35,000 , MPa – 930 | Psi – 75,000 , MPa – 517 | 42.5 % |
Inconel 601/625 Flanges Other Types
601/625 Alloy Sliding Flange
Inconel 601/625 Weld Neck Flanges
Alloy 601/625 Blind Flanges
Alloy 601/625 Threaded Flanges
Alloy 601/625 Socket Weld Flanges
Inconel 601/625 Lap Joint Flanges
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
About Gnee Steel
Gnee Steel is a professional manufacturer of nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs. For inquiries about alloy material prices or customized alloy material solutions, please feel free to contact us via email at ss@gneemetal.com for a quote.
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