Comparison of Inconel 601 round bar and Inconel 617 nickel-based alloy steel bar
Comparison of Inconel 601 round bar and Inconel 617 nickel-based alloy steel bar
Inconel 601 round bars exhibit excellent performance in high-temperature oxidation and carburization, making them ideal materials for manufacturing furnace components. Inconel 617 bars, due to their cobalt and molybdenum content, possess superior overall high-temperature strength, metallurgical stability, and corrosion resistance to both oxidizing and reducing media, making them more suitable for extreme conditions such as those found in gas turbines and chemical processing. The main difference between the two is that Inconel 617 alloy bars contain more alloying elements, thus enhancing strength and corrosion resistance, while Inconel 601 bars are specifically designed for high-temperature and oxidizing environments, particularly known for their resistance to chloride stress corrosion cracking and caustic corrosion.
What are the differences between Alloy 600 and Alloy 601?
Both alloys exhibit excellent durability at high temperatures, but Inconel 601 has superior oxidation resistance, making it more suitable for high-temperature applications; while Inconel 600 is better suited for environments where there is a risk of chloride stress corrosion cracking.
Chemical composition comparison of Nickel 601 rods and Inconel 617 rods
| Element | Nickel 601 (UNS N06601) | Nickel 617 (UNS N06617) |
|---|---|---|
| Nickel (Ni) | 58.0 – 63.0 % | ≥ 44.0 % |
| Chromium (Cr) | 21.0 – 25.0 % | 20.0 – 24.0 % |
| Iron (Fe) | Balance | ≤ 3.0 % |
| Aluminum (Al) | 1.0 – 1.7 % | 0.8 – 1.5 % |
| Cobalt (Co) | – | 10.0 – 15.0 % |
| Molybdenum (Mo) | – | 8.0 – 10.0 % |
| Carbon (C) | ≤ 0.10 % | 0.05 – 0.15 % |
| Manganese (Mn) | ≤ 1.0 % | ≤ 1.0 % |
| Silicon (Si) | ≤ 0.5 % | ≤ 1.0 % |
| Copper (Cu) | ≤ 1.0 % | ≤ 0.5 % |
| Titanium (Ti) | ≤ 0.15 % | – |
| Sulfur (S) | ≤ 0.015 % | ≤ 0.015 % |
| Phosphorus (P) | – | ≤ 0.015 % |
| Boron (B) | – | ≤ 0.006 % |
Inconel 601 (UNS N06601)
Composition: Rich in nickel and chromium, with added aluminum to enhance oxidation resistance.
Inconel 617 (UNS N06617)
Composition: Nickel-chromium-cobalt-molybdenum alloy with a high molybdenum content.
Comparison of Properties between Inconel 601 and 617 Alloy Rods
| Feature / Property | Nickel 601 Rod (UNS N06601) | Nickel 617 Rod (UNS N06617) |
|---|---|---|
| High‑Temperature Strength | Excellent up to ~1250°C, especially in oxidizing atmospheres | Excellent up to ~1150°C, with superior creep‑rupture strength |
| Oxidation Resistance | Outstanding (high Al content forms stable Al₂O₃ scale) | Excellent (Cr‑rich oxide scale, enhanced by Co and Mo) |
| Carburization/Nitriding Resistance | Very good | Very good, suitable for carburizing/nitriding environments |
| Corrosion Resistance | Good in oxidizing, chlorinating, and sulfidizing atmospheres | Excellent in hot corrosive gases (e.g., sulfur‑bearing, chloride‑rich) |
| Weldability | Excellent (commonly welded with matching filler) | Good, but requires careful control to avoid hot cracking |
| Machinability | Good (similar to other austenitic nickel alloys) | Moderate (harder due to Co and Mo content) |
| Thermal Fatigue Resistance | Excellent (high thermal stability and ductility) | Very good (maintains strength under thermal cycling) |
| Primary Alloying Additions | High Cr, high Al, balanced Fe | High Cr, Co, Mo, with controlled C and Al |
| Typical Microstructure | Austenitic, with fine‑grained Al₂O₃‑forming surface layer | Austenitic, strengthened by carbides and solid‑solution elements |
| Common Service Environments | Furnace components, radiant tubes, thermal processors | Gas turbine hot sections, advanced nuclear reactors, chemical reformers |
| Forming & Fabrication | Good hot and cold workability | Requires more power for hot working; can be cold worked with care |
| Cost Consideration | Generally lower than 617 (no Co/Mo addition) | Higher due to Co and Mo content |
| Long‑Term Stability | Excellent under continuous high‑temperature exposure | Exceptional creep and rupture life (>100,000 h at high temperatures) |
| Sulfidation Resistance | Good | Very good (Mo and Co enhance resistance) |
| Chloride Stress‑Corrosion Cracking (SCC) | Good resistance | Very good resistance |
Inconel 601 (UNS N06601)
Main advantages: Excellent oxidation resistance at high temperatures, resistance to chloride stress corrosion cracking, and resistance to carburization.
Inconel 617 (UNS N06617)
Main advantages: Combines excellent high-temperature strength, metallurgical stability, and oxidation resistance; resistant to both oxidizing and reducing environments.
Comparison of applications of Inconel 601 and Inconel 617 alloy rods
| Field / Application | Nickel 601 Rod (UNS N06601) | Nickel 617 Rod (UNS N06617) |
|---|---|---|
| Industrial Furnaces & Heat Treatment | Radiant tubes, muffles, annealing trays, sintering belts, kiln furniture, roller hearths | High‑temperature furnace components, heat‑treating fixtures, brazing trays, carburizing boxes |
| Power Generation | Combustor liners, heat recovery steam generator (HRSG) tubes, boiler internals | Gas turbine combustion liners, transition ducts, turbine blades, advanced nuclear reactor core components |
| Chemical & Petrochemical | Catalyst support grids, chlorination reactor internals, pyrolysis tube supports | Reformer tubes, cracking furnace parts, high‑temperature heat exchangers in corrosive gases |
| Aerospace & Gas Turbines | Combustion chambers, afterburner liners, exhaust ducts, thrust reverser components | Turbine blades, vanes, combu |
Inconel 601 (UNS N06601)
Best applications: Furnace components, heat treatment baskets, chemical equipment, and heat treatment equipment.
Inconel 617 (UNS N06617)
Best applications: Gas turbines, high-temperature reactors, aerospace components, and harsh chemical 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
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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