Inconel 600 and Nickel 718 Pipes: A Comprehensive Overview
Inconel 600 and Nickel 718 Pipes: A Comprehensive Overview
Inconel 600 tubing offers excellent high-temperature strength, oxidation resistance, and moderate corrosion resistance, making it suitable for furnace/chemical environments. Inconel 718 tubing, on the other hand, is renowned for its superior high strength, creep resistance, and toughness, making it a critical material in industries such as aerospace, gas turbines, and oil and gas well tools. Compared to the simple solid solution strengthening of Inconel 600 tubing, Inconel 718 tubing provides higher mechanical properties through precipitation strengthening. Both are nickel-based superalloys, but the niobium/molybdenum content of Inconel 718 tubing results in higher strength and therefore a higher cost, but it is essential for critical, demanding applications.
What are the advantages of Inconel 718?
Inconel 718 is a high-strength, corrosion-resistant nickel-based superalloy. It possesses excellent mechanical properties, high-temperature strength, and resistance to oxidation and corrosion. Inconel 718 is widely used in various industries, including aerospace, oil and gas, automotive, and power generation.
Inconel 600 pipe is a high-performance nickel-chromium-iron alloy (Inconel 600) designed for transporting fluids in extreme high-temperature environments (up to approximately 1150°C) and highly corrosive media (such as chlorides, caustic alkalis, and various acids and alkalis). Its core advantages lie in its superior high-temperature strength retention, excellent resistance to oxidation and chloride stress corrosion cracking. It is primarily used in critical applications such as heat transfer tubes in nuclear power plant steam generators, petrochemical cracking furnace tubes, radiant tubes in heat treatment equipment, and pipelines in harsh chemical processes. It is a top-tier, reliable pipe solution for demanding conditions where stainless steel cannot meet the requirements, but at a significantly higher cost.
Inconel 718 pipe is a special pipe material made from a precipitation-hardening nickel-chromium-based superalloy (Inconel 718). Its core feature is precipitation strengthening through elements such as niobium, maintaining ultra-high strength, excellent creep and fatigue resistance at temperatures up to approximately 700°C, while also possessing good corrosion resistance. It is designed specifically for the harsh environments in aero-engines, spacecraft propulsion systems, high-performance racing cars, and the oil and gas industry where pipelines need to withstand extreme pressure, high temperature, and intense thermal cycling, such as fuel/hydraulic lines, high-temperature gas ducts, and deep well work strings. It is a top choice for pipe materials that meet the requirements of high strength and high stability. The processing and heat treatment processes are complex and costly.
Specification of Inconel Alloy 600,718 Pipes
Pipe/Tube Specifications:ASTM B167, B517, B516 / ASME SB167, SB517, SB516
Dimensions:ASTM, ASME
Pipe Outside Diameter: 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock
Tube Outside Diameter: 1/8" OD TO 2"OD 3MM OD TO 38 MM OD
Range:1/2" OD up to 5" OD, customs diameters also available
Type: Seamless / ERW / Welded / Capillary Tubes
Form: Round Tube, Square Tube, Rectangular Tube
Length: Single Random, Double Random & Required Length
End: Plain End, Beveled End, Treaded
End Protection: Plastic Caps
Finish: Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
External Coating: 3LPE / 3LPP/ FBE/ DFBE/ PP
Available Inconel alloy pipes types: 600 and 718
Tubes
Tubes
Equivalent Grades of Inconel Alloy 600, 718 Pipes
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| Inconel 600 | 2.4816 | N06600 | NCF 600 | NA 13 | МНЖМц 28-2,5-1,5 | NC15FE11M | NiCr15Fe |
| Inconel 718 | 2.4668 | N07718 | - | - | - | - | - |
Chemical Composition of Inconel Alloy 600,718 Tubes
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr |
| Inconel 600 | 0.15 max | 1.00 max | 0.50 max | 0.015max | 0.50 max | 6.00 – 10.00 | 72.00 min | 14.00 – 17.00 |
| Inconel 718 | 0.08 max | 0.35 max | 0.35 max | 0.015 max | 0.30 max | - | 50.00 - 55.00 | 17.00 - 21.00 |
Inconel Alloy 600,718 Tubes Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Inconel 600 | 8.47 g/cm3 | 1413 °C (2580 °F) | Psi – 95,000 , MPa – 655 | Psi – 45,000 , MPa – 310 | 40 % |
| Inconel 718 | 8.2 g/cm3 | 1350 °C (2460 °F) | Psi – 1,35,000 , MPa – 930 | Psi – 75,000 , MPa – 482 | 45 % |
Inconel 600 Pipe (UNS N06600)
Composition: High nickel (minimum 72%), chromium (14-17%).
Key Advantages: Excellent oxidation resistance, high-temperature strength, good formability, resistance to chloride stress corrosion cracking.
Applications: Furnaces, chemical industry, nuclear engineering, food processing, heat exchangers, superheaters, general industrial piping.
Optimal Uses: Moderate to harsh high-temperature environments requiring corrosion/oxidation resistance; simpler to apply than 718 pipe.
Inconel 718 Pipe (UNS N07718)
Composition: Nickel, chromium, iron, and significant amounts of niobium, molybdenum, titanium, and aluminum.
Key Advantages: Excellent strength (tensile strength/yield strength), high toughness, excellent creep rupture strength, good weldability, excellent corrosion resistance in harsh media.
Application areas: Aerospace (jet engines, rockets), gas turbines, nuclear reactors, oil and gas (downhole tools, wellhead equipment), cryogenic technology.
Most suitable for: Critical load-bearing components requiring extremely high strength and reliability at extremely high temperatures.
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
