The difference between INCONEL Alloy 600 and Alloy 617
The difference between INCONEL Alloy 600 and Alloy 617
INCONEL 600 is a high-nickel, high-chromium alloy suitable for general high-temperature, corrosive, and strongly alkaline environments, especially for chloride stress cracking. INCONEL 617 is a more advanced nickel-chromium-cobalt-molybdenum alloy with added cobalt and molybdenum, significantly improving its high-temperature strength, stability, and excellent corrosion resistance under redox conditions, making it more suitable for extreme high-temperature applications than INCONEL 600.
What are the differences between Inconel 600 and 718?
Inconel 600 offers excellent corrosion resistance and formability, making it suitable for chemical and marine applications. Inconel 718, on the other hand, boasts superior high-temperature strength and creep resistance, making it the material of choice for aerospace and oil and gas applications.
Inconel 600/UNS N06600
Inconel 600 is a solid solution strengthened alloy, primarily composed of nickel and chromium. It exhibits excellent oxidation resistance and corrosion resistance, making it suitable for applications in chemical processing, aerospace, and nuclear engineering. This alloy has a wide range of applications and can withstand various corrosive environments and high-temperature conditions.
Inconel 617/UNS N06617
Inconel 617 combines nickel, chromium, cobalt, and molybdenum, exhibiting excellent strength and oxidation resistance at high temperatures. Its high-temperature strength and corrosion resistance make it ideal for gas turbines, petrochemicals, and heat exchangers.
Comparison of chemical composition (wt%) of INCONEL 600 and 617 alloys
| Alloy | Ni | Cr | Fe | Mo | Co | Nb | Al | Ti | Mn | Si | C | Other |
| Inconel 600 | ≥72 | 14-17 | 6-10 | – | – | – | – | – | ≤1 | ≤0.5 | ≤0.15 | Cu ≤0.5, S ≤0.015 |
| Inconel 617 | ≥44.5 | 20-24 | ≤3 | 8-10 | 10-15 | – | 0.8-1.5 | – | ≤0.5 | ≤0.5 | 0.05-0.15 | B ≤0.006, S ≤0.015 |
Comparison of mechanical properties of INCONEL 600 and 617 alloys (annealed state)
| Alloy | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (Rockwell) |
| Inconel 600 | 550 (80 ksi) | 240 (35 ksi) | 30% | B80 |
| Inconel 617 | 750 (109 ksi) | 345 (50 ksi) | 35% | B95 |
INCONEL 600 and 617 Alloy Product Forms and ASTM Standards
| Alloy | Pipes & Tubes | Plates, Sheets & Strips | Bars & Rods | Forgings | Rings |
| Inconel 600 | ASTM B167 | ASTM B168 | ASTM B166 | ASTM B564 | Custom |
| Inconel 617 | ASTM B166 | ASTM B168 | ASTM B166 | ASTM B564 | Custom |
Heat treatment processes for INCONEL 600 and 617 alloys
| Alloy | Solution Annealing Temperature | Cooling Method | Precipitation Hardening (if applicable) |
| Inconel 600 | 1010–1150°C (1850–2100°F) | Air cool | Not applicable |
| Inconel 617 | 1120–1205°C (2050–2200°F) | Air cool | Not applicable |
Welding properties of INCONEL 600 and 617 alloys
| Alloy | Weldability Rating | Recommended Welding Process | Post-Weld Heat Treatment |
| Inconel 600 | Excellent | GTAW (TIG), GMAW (MIG), SMAW (Stick) | Not required |
| Inconel 617 | Good | GTAW, GMAW | Not required |
Comparison of corrosion resistance between INCONEL 600 alloy and 617 alloy
| Alloy | Oxidation Resistance | Sulfidation Resistance | Acid Resistance | Seawater Resistance |
| Inconel 600 | Excellent up to 1095°C (2000°F) | Moderate | Good (Nitric, Hydrochloric acids) | Moderate |
| Inconel 617 | Outstanding up to 1100°C (2000°F) | Excellent | Moderate | Limited |
INCONEL 600 and 617 alloys for industry-specific applications
| Alloy | Aerospace | Oil & Gas | Chemical Processing | Marine & Offshore | Power Generation |
| Inconel 600 | Jet engine components, exhaust liners | Furnace components, heat exchangers | Caustic alkali environments | Not ideal (limited seawater resistance) | Steam superheaters, nuclear reactor components |
| Inconel 617 | Gas turbines, combustion liners | High-temp piping, flue gas systems | High-temperature chemical processing | Limited use | Heat exchangers, petrochemical plants |
Cost Analysis
| Alloy | Raw Material Cost | Machinability | Welding Cost | Lifecycle Value |
| Inconel 600 | $$ (Moderate) | Fair (work hardens) | Moderate | High (long lifespan in heat/corrosion environments) |
| Inconel 617 | $$$ (High) | Difficult (high cobalt content) | High (special handling) | High (high-temp, long-life applications) |
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 600 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 600 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 600, 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.
