Gnee Steel offers a full range of 600/601/625/718 alloy pipe fittings. Among them, Inconel 718 fittings (UNS N07718) are a chromium-nickel-molybdenum alloy with excellent corrosion resistance, able to withstand a variety of highly corrosive environments, crevice corrosion, and pitting corrosion. Inconel 625 fittings (UNS N06625) are an oxidation- and corrosion-resistant nickel alloy, widely used due to their excellent water resistance and high strength. Inconel 601 fittings (UNS N06601) are a nickel-chromium alloy suitable for applications requiring heat and corrosion resistance.
Differences between Inconel 600 and Inconel 718 fittings
Gnee Steel
Differences between Inconel 600 and Inconel 718 fittings
The main differences between Inconel 600 and 718 fittings lie in their strength and applications: Inconel 600 is a solid solution strengthened nickel-chromium alloy, focusing on corrosion resistance and heat resistance; while Inconel 718 is a precipitation hardening high-strength nickel-chromium-iron alloy, designed for extreme temperatures, high stress, and aerospace environments. Compared to Inconel 600, Inconel 718 is harder and stronger, but also more difficult to process.
Gnee steel
What are the disadvantages of Inconel 718?
Disadvantages and alternatives of Inconel 718
While Inconel 718 boasts excellent mechanical and corrosion resistance properties, it also has some drawbacks: High cost: Due to its complex manufacturing process, Inconel 718 is expensive. Difficult to process: Its high hardness makes material removal difficult and accelerates tool wear.
Inconel 600 fittings are pipe connections (such as elbows, tees, and flanges) made of a high-performance nickel-chromium-iron alloy (Inconel 600). Their core strength lies in fully utilizing the alloy's excellent strength retention, superior oxidation resistance, and resistance to chloride stress corrosion cracking at temperatures up to approximately 1150°C. They provide reliable and durable connection solutions for high-temperature, highly corrosive piping systems in harsh environments such as chemical, nuclear power, heat treatment, and marine engineering, ensuring the system's sealing integrity and structural safety in extreme conditions. They are key components for meeting stringent connection requirements where stainless steel cannot meet the demands.
Inconel 718 fittings are pipe connections (such as elbows, tees, and flanges) made of a precipitation-hardening nickel-chromium-based superalloy (Inconel 718). Their 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 critical piping systems in fields such as aircraft engines, aerospace propulsion systems, oil and gas, and high-performance racing cars that require the ability to withstand extreme pressure, high temperatures, and severe vibrations. It ensures structural integrity and sealing reliability under harsh operating conditions and is the top choice for pipe fittings that meet the requirements of high strength and high stability.
Inconel 600/718 Pipe Fittings
Inconel 600/ nickel 718 Pipe Fittings Equivalent Grades
| Standard | Inconel 600 | Inconel 718 | ||
| UNS | N06600 | N07718 | ||
| Werkstoff Nr. | 2.4816 | 2.4668 | ||
| EN | NiCr15Fe |
- |
||
| BS | NA 13 | - | ||
| GOST | МНЖМц 28-2,5-1,5 | - | ||
| JIS | NCF 600 | - | ||
| AFNOR | NC15FE11M | - |
Inconel 600/ Alloy 718 Pipe Fittings Specification
Specification : ASTM B366, ASTM SB 366, ASTM B564, ASME SB564
Dimensions : ANSI/ASME B16.9, B16.28, MSS-SP-43.
Size : ½"NB to 24″NB in Sch 10s, 40s, 80s, 160s, XXS.
Type : Seamless / Welded / Fabricated
ASTM B366 Inconel 600/718 Alloy Pipe Fittings Chemical Composition
| Grade | Ni | Fe | C | Mn | Si | Cu | Cr | S | Mo | Co | Al | Ti | Nb |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 600 | 72.0 min | 6.0 - 10.0 | 0.15 max | 1.0 max | 0.5 max | 0.5 max | 14.0 - 17.0 | 0.015 max | - | - | - | - | - |
| 718 | 50 - 55 | - | 0.08 max | 0.35 max | 0.35 max | 0.3 max | 17 - 21 | .015 max | 2.8 - 3.3 | 1.0 max | - | - | - |
Inconel 600/ inconel 718 Pipe Fittings Physical Properties
| Element | Inconel 600 | Inconel 718 | ||
| Density | 8.47 g/cm3 | 8.2 g/cm3 | ||
| Melting Point | 1413 °C (2580 °F) | 1350 °C (2460 °F) | ||
| Tensile Strength | Psi – 95,000 , MPa – 655 | Psi – 1,35,000 , MPa – 930 | ||
| Yield Strength (0.2%Offset) | Psi – 45,000 , MPa – 310 | Psi – 75,000 , MPa – 482 | ||
| Elongation | 40 % | 45 % |
High-pressure forged Inconel 600 and 718 alloy pipe fittings
Threaded and socket weld pipe fittings
| Products | Size | |
| Inconel 90° Elbows | Inconel Couplings | Sizes 1/8″ – 4″ Pressure Ratings – 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS |
| Inconel 45° Elbows | Inconel Reducers | |
| Inconel Street Elbows | Inconel Inserts | |
| Inconel Tees | Inconel Caps | |
| Inconel Crosses | Inconel Unions | |
Inconel 600/718 Pipe Fittings Application Industry
Inconel 600 and Inconel 718 fittings (UNS N06600) are a chromium-nickel alloy suitable for applications requiring corrosion resistance and high temperatures. Gnee Steel also offers customized Inconel 718 alloy fittings in various sizes and shapes to meet customer needs. Please contact us for a quote if needed.
Gnee Steel is a professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ru@gneesteelgroup.com for a quote.