Inconel 601 (UNS N06601) chemical composition: key to its oxidation resistance up to 1250°C
Inconel 601 Chemical Composition
Inconel 601 excels in high-temperature oxidation resistance due to its aluminum content, ideal for furnace parts, while Inconel 625 offers superior strength and broad corrosion resistance (especially chloride, pitting, and crevice) from its molybdenum and niobium, making it better for severe chemical, marine, and aerospace uses, though 601 offers better creep strength at extreme heat. The key choice: 601 for heat/oxidation, 625 for strength/corrosion in harsh wet/chemical environments, despite 625's higher cost.
Is Inconel 601 magnetic?
Inconel 601 sheet is a non-magnetic nickel-chromium alloy with properties including high-temperature strength comparable to 18-8 alloys and high corrosion resistance to organic and inorganic corrosive agents. 601 alloy sheet performs well in temperature ranges from cryogenic temperatures up to 2000°F.
1. Inconel 601 Chemical Composition (ASTM B168 Standard)
The performance of Alloy 601 depends on the precise balance of Nickel, Chromium, and Aluminum. Below is the standard composition we guarantee for every shipment.
| Element | Nickel (Ni) | Chromium (Cr) | Aluminum (Al) | Carbon (C) | Iron (Fe) |
| UNS N06601 | 58.0 - 63.0% | 21.0 - 25.0% | 1.0 - 1.7% | ≤ 0.10% | Remainder |
Role of Nickel: Provides resistance to chloride-ion stress-corrosion cracking and maintains ductility.
Role of Chromium: Offers superior protection against oxidizing environments and high-temp corrosion.
The Aluminum Advantage: Unlike Alloy 600, the addition of Al in 601 allows for the formation of a dense, adherent oxide scale that prevents spalling at 1250°C.
Buy Certified Alloy 601 with 100% Material Traceability
2. Physical Properties & Magnetism: Is Inconel 601 Magnetic?
Magnetic properties: Inconel 601 is non-magnetic at room temperature. Its high nickel-chromium content ensures a stable austenitic structure.
Melting point: 1360–1411°C (2480–2571°F).
Density: 8.11 g/cm³ (0.293 lb/in³).
1. Nickel (Ni)
As the element with the highest content in the chemical composition of Inconel 601 (typically between 58% and 63%), nickel provides the material with excellent corrosion resistance, enabling it to withstand the erosion of various corrosive media (such as acids, alkalis, and salts), especially in high-temperature oxidizing and reducing environments. It also allows the material to maintain and improve stable high mechanical strength, plasticity, and toughness at high temperatures, ensuring that the steel does not easily undergo brittle fracture and deformation under complex stress conditions. The nickel element in Inconel 601 alloy steel gives it these excellent properties, making it widely used in chemical, petroleum, and marine engineering fields for manufacturing corrosion-resistant equipment and components.
2. Chromium (Cr)
Chromium is the second most abundant element in the chemical composition of Inconel 601 and is a key element in enhancing the alloy's corrosion resistance and oxidation resistance. It plays a strengthening role in Inconel 601 material. As a strong oxidizing agent, it can form a dense and strongly adherent chromium oxide film on the material surface. This oxide film has self-healing capabilities, quickly regenerating even if the material is slightly damaged, thus protecting the base metal from corrosion and resisting the erosion of various corrosive media. At high temperatures, this oxide film can effectively resist the erosion of oxidizing gases and molten salts, preventing further oxidation of the base metal and giving the alloy excellent high-temperature oxidation resistance.
In short, the addition of chromium not only helps improve the oxidation resistance and chloride stress corrosion cracking resistance of Inconel 601 steel but also enables it to perform excellently in sulfur-containing atmospheres and corrosive environments.
3. Iron (Fe)
In the chemical composition of Inconel 601, the addition of a small amount of iron interacts with other elements, affecting the material's crystal structure and mechanical properties. It helps reduce costs and improve the strength and toughness of the alloy. In addition, it maintains a certain degree of plasticity during processing, making it easier to perform hot and cold working.
As a ferromagnetic metal, iron can enhance the mechanical properties of the alloy, making it more stable under stress. This makes the steel perform excellently in components subjected to mechanical stress (such as pipes, valves, and structural components).
4. Aluminum (Al)
The presence of this element enhances the mechanical properties of Inconel 601 alloy steel at high temperatures. Aluminum reacts with oxygen to form aluminum oxide. Aluminum oxide and chromium oxide together form a more stable and denser protective film, further improving its oxidation resistance and corrosion resistance. It can also refine the grain size, improve the material's processing performance and mechanical properties, and increase the material's high-temperature strength and hardness.
Aluminum and titanium are the main elements that contribute to precipitation strengthening. Further enhancement of the alloy's mechanical properties can be achieved through age hardening after solution treatment. The combination of nickel, chromium, and aluminum allows the 601 alloy to maintain excellent oxidation resistance at high temperatures below 1200°C. This characteristic is very important in heat treatment equipment, heating furnaces, and industrial furnace components.
5. Manganese (Mn)
Manganese in nickel-based Inconel 601 steel mainly acts as a deoxidizer and desulfurizer, removing impurities, improving the material's toughness and workability, increasing the purity of the alloy, and making the material easier to form during processing.
6. Silicon (Si)
This element is present in relatively small amounts in the chemical composition of Inconel 601, usually not exceeding 0.5%. It can improve the material's oxidation resistance. At the same time, it helps the material maintain good mechanical strength at high temperatures. It can also improve the casting performance of the material, making the liquid metal flow more smoothly during solidification and reducing casting defects. It should be noted that excessively high silicon content will reduce the toughness of the alloy.
In addition to the elements mentioned above, the chemical composition of Inconel 601 also contains other trace elements, which also play an important role in optimizing mechanical properties and microstructure stability.
3. Industrial Applications: Fields Where Chemical Stability is Critical
Our 601 alloy products are designed for the following applications:
Heat Treatment: Muffle furnaces, distillation kettles, and heat treatment baskets.
Petrochemicals: Catalytic grid supports and radiant tubes.
Power Generation: Ash removal systems and superheater tube supports.
Pollution Control: Thermal oxidizer components and exhaust systems.
4. About GNEE Steel: Your Premier Nickel Alloy Factory
GNEE Steel Group is a world-class supplier of high-nickel alloys with over 18 years of global export experience.
Inventory & Stock: We maintain a constant stock of Inconel 601 Plates, Tubes, and Bars in our 35,000+ SQM warehouse.
Quality Certification: Every order is delivered with a Mill Test Certificate (MTC) 3.1 according to EN 10204, documenting the exact chemical heat analysis.
Custom Services: CNC machining, laser cutting, and specialized polishing to your project drawings.
Fast Global Shipping: Strategic partnership with global logistics hubs ensuring delivery within 7-15 days.
📦 Professional Packaging & Delivery:
Sea-worthy Packing: Waterproof plastic wrapping + fumigated wooden pallets or crates.
Detailed Labeling: Each piece is marked with the heat number, grade, and size for full traceability.
Damage Prevention: Heavy-duty steel banding and edge protectors used for all sea/air shipments.
Gnee Steel packing
Contact us for the latest Inconel 601 export quotation
FAQ
Q: Can GNEE provide Inconel 601 alloy with a specific low carbon content?
A: Yes, we can customize the chemical composition within the ASTM standard range according to your specific corrosion protection or welding requirements.
Q: Do you perform PMT (Positive Material Qualification) testing?
A: Yes, we conduct 100% PMI testing before shipment to ensure the chemical composition matches your order.
Q: What is the price difference between 601 and 600 alloys?
A: Due to the addition of aluminum, 601 alloy is generally slightly more expensive, but it has better durability under high-temperature oxidation conditions.
Q：What is the chemical composition of Inconel 601?
A：As expected, the main component of nickel-based alloy 601 is nickel (58-63%), along with: chromium 21-25%, aluminum 1-1.7%, and manganese 1% (maximum).
Q：What is the difference between Inconel 600 and Alloy 601?
A：Compared to Inconel 600, Inconel 601 has a higher aluminum content. This gives Inconel 601 better oxidation resistance, higher high-temperature strength, and good resistance to hot corrosion.
Q：How is the processing performance of Inconel 601?
A：It has good water corrosion resistance, high mechanical strength, and is easy to form, process, and weld. These properties make Inconel 601 a widely used material in heat treatment, chemical processing, pollution control, aerospace, and power generation.
