Inconel 600 is a nickel-chromium-iron solid-solution strengthened high-temperature alloy, renowned for its exceptional high-temperature oxidation resistance (up to approximately 1150°C), excellent resistance to chloride ion stress corrosion cracking, and outstanding stability in alkaline and high-temperature pure water environments. It is widely used in critical applications such as heat treatment equipment, chemical processing, nuclear power plant steam generators, and aerospace, where materials must maintain their performance under extreme temperatures and corrosive conditions. It is a fundamental high-performance nickel-based alloy for demanding operating environments.
What are the differences between Inconel 600 and 718?
Inconel 600 has excellent corrosion resistance and formability, making it suitable for chemical processing and marine applications. Inconel 718, on the other hand, possesses superior high-temperature strength and creep resistance, making it the preferred material for aerospace and oil and gas industries.
UNS N0660 (Alloy 600, W.Nr. 2.4816, Inconel 600) is a nickel-chromium alloy known for its non-magnetic properties. Due to its high nickel content, this alloy exhibits excellent corrosion resistance to both organic and inorganic compounds, making it highly resistant to chloride ion stress corrosion cracking. The addition of chromium provides resistance to sulfide corrosion and offers oxidation protection in high-temperature or corrosive environments. Furthermore, this alloy possesses excellent mechanical properties, including high strength and superior machinability. However, it's important to note that Inconel 600 cannot be precipitation hardened and can only be strengthened through cold working. Its exceptional versatility makes it an ideal choice for a wide range of applications, suitable for use across a broad temperature range, from cryogenic environments to high temperatures exceeding 2000°F (1095°C).
Inconel 600 Chemical Composition (%)
|
Material |
Ni |
Cr |
Fe |
C |
Mn |
S |
Si |
Cu |
|
N06600 |
72.0 min |
14.0-17.0 |
6.00-10.00 |
0.15 max |
1.00 max |
0.015 max |
0.50 max |
0.50 max |
Nickel 600 Mechanical Property
|
Material |
Tensile strength |
Yield strength 0,2 |
Elongation |
Hardness HB30 |
|
N06600 |
550-725 N/mm² |
170-345N/mm² |
35-55% |
65-85HB |
Inconel 600 Corrosion Resistance
Inconel 600, with a minimum nickel content of 72% and a chromium content of 14%, exhibits superior oxidation resistance compared to commercially available pure nickel. It demonstrates excellent corrosion resistance to a wide range of corrosive media. The high nickel content allows it to maintain considerable corrosion resistance even in reducing environments, while also exhibiting excellent resistance to alkaline solutions and strong oxidizing acids. However, it is important to note that dissolved oxygen alone is insufficient to ensure complete passivation and cannot entirely prevent attack by air-saturated mineral acids and certain concentrated organic acids.
Heat Treatment of Inconel 600 Alloy
The performance of Inconel 600 alloy during heating is influenced by several interrelated factors, including the degree of cold working, grain size, chemical composition, and material dimensions. Therefore, the specific time and temperature required for heat treatment usually need to be determined experimentally.
Generally, grain growth in Inconel 600 alloy only occurs when heated to approximately 1800°F (980°C). At this temperature, the fine, dispersed carbide particles in the alloy's microstructure that hinder grain growth begin to coalesce. Dissolution of the carbides begins at approximately 1900°F (1040°C). Heat treatment of the alloy at temperatures ranging from 2000°F to 2100°F (1090°C to 1150°C) for 1 to 2 hours allows for complete dissolution of the carbides and results in increased grain size. This solution treatment is beneficial for achieving optimal creep strength and fracture strength.
Machining
The machinability of Inconel 600 is slightly better than that of 304 stainless steel, but slightly inferior to that of 303 free-machining stainless steel. When machining Inconel 600 alloy, it is recommended to use heavy-duty equipment capable of withstanding the load and effectively dissipating heat. Cutting tools should be sharp and have the appropriate geometry for optimal machining performance.
Welding
Inconel 600 can be easily welded using conventional welding techniques. For joining Inconel 600 alloy, the following welding materials are recommended: Inconel 182 welding rods for shielded metal arc welding, Inconel 82 filler metal for tungsten inert gas welding and gas metal arc welding, and a combination of Inconel 82 filler metal and Incoflux 4 submerged arc welding flux for submerged arc welding. These welding materials have been specifically selected to ensure effective and reliable welding of Inconel 600.
Inconel 600 Product Forms
Ø Bars and Rods
Ø Plates and Sheets
Ø Coils and Strips
Ø Tubes
Ø Pipe Fittings: Flanges, Tees, Elbows, Reducers, etc.
Ø Forgings: Rings, Shafts, Discs, Blocks, etc.
Applications of Inconel 600
Inconel 600 is widely used in various industries due to its versatility and reliability:
Chemical Processing
In the chemical processing industry, Inconel 600 is used in equipment such as heat exchangers, evaporators, and condensers. The alloy's high corrosion resistance ensures a long service life in environments containing acids, alkalis, and oxidizing agents.
Aerospace
Due to its high-temperature strength, Inconel 600 is crucial in the aerospace sector. It is used in components such as seals, turbine blades, and exhaust linings in jet engines.
Power Generation
Because of its stability under temperature fluctuations and resistance to oxidation, Inconel 600 plays a vital role in power plants, particularly in steam generators and reactors.
Nuclear Industry
The alloy's resistance to high-purity water corrosion and radiation damage makes it a preferred material for nuclear reactors, control rod mechanisms, and steam generator tubing.
Food Processing
It is used in heating equipment for food processing, where resistance to organic and inorganic acids is essential.
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 also supplies custom Inconel 600 products in various sizes and specifications. Please send us your drawings for a quote!
