Gnee Steel is a professional manufacturer of nickel-based alloys 718, 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.
Nitronic 50 vs Inconel 718 Alloy
Nitronic 50 vs Inconel 718 Alloy
Nitronic 50 and Inconel 718 are both high-performance corrosion-resistant alloys, but their primary applications differ. Nitronic 50 is a nitrogen-strengthened, high-performance austenitic stainless steel with excellent corrosion resistance (superior to 316 stainless steel) and approximately twice the strength. Inconel 718 is a nickel-based superalloy with significantly higher extreme high-temperature strength, high-temperature creep resistance, and excellent fatigue resistance than Nitronic 50, making it suitable for aerospace and demanding oil and gas applications.
Is Inconel 718 alloy weldable?
Inconel 718 alloy exhibits excellent weldability in both age-hardened and annealed states. However, despite its high resistance to strain-induced aging cracking, some welding issues remain, such as microcracks and solidification cracks.
Nitronic 50 and Inconel 718 are both high-performance alloys, renowned for their exceptional strength, corrosion resistance, and high-temperature stability. While both are used in similar industries such as aerospace, chemical, and marine, their compositions, properties, and characteristics differ.
1. Chemical composition of Nitronic 50 and Inconel 718
| Element | Nitronic 50 (ASTM A276 / UNS S20910) | Inconel 718 (UNS N07718) |
|---|---|---|
| Iron (Fe) | Balance | Balance |
| Nickel (Ni) | 8.0 - 12.0 % | 50.0 - 55.0 % |
| Chromium (Cr) | 20.0 - 23.0 % | 17.0 - 21.0 % |
| Manganese (Mn) | 10.0 - 14.0 % | ≤ 0.35 % |
| Molybdenum (Mo) | 1.5 - 3.0 % | 2.8 - 3.3 % |
| Niobium (Nb) | - | 4.75 - 5.5 % |
| Titanium (Ti) | - | 0.65 - 1.15 % |
| Aluminum (Al) | - | 0.20 - 0.8 % |
| Silicon (Si) | ≤ 1.00 % | ≤ 0.35 % |
| Carbon (C) | ≤ 0.06 % | ≤ 0.08 % |
| Nitrogen (N) | 0.20 - 0.40 % | - |
| Phosphorus (P) | ≤ 0.045 % | ≤ 0.015 % |
| Sulfur (S) | ≤ 0.030 % | ≤ 0.015 % |
| Copper (Cu) | ≤ 0.75 % | ≤ 0.30 % |
| Boron (B) | - | ≤ 0.006 % |
| Cobalt (Co) | - | ≤ 1.0 % |
2. Temperature Resistance
- Nitronic 50 Alloy:
Nitronic 50 exhibits good high-temperature resistance, capable of withstanding temperatures up to approximately 1,600°F (871°C). However, compared to Inconel 718, its temperature resistance is lower, making it more suitable for medium to high temperature environments and therefore less suitable for extreme high-temperature applications.
- Inconel 718 Alloy:
Inconel 718 is designed for extreme high-temperature applications, capable of withstanding temperatures up to 1,300°F to 1,400°F (704°C to 760°C) without a significant reduction in its mechanical properties. Even at such high temperatures, it maintains excellent strength and oxidation resistance, making it commonly used in jet engines, gas turbines, and other high-temperature environments.
3. Corrosion Resistance and Oxidation Resistance
- Nitronic 50:
Nitronic 50 exhibits excellent corrosion resistance in a variety of environments, including marine and acidic environments. Its high manganese content provides excellent resistance to pitting and crevice corrosion, making it ideal for seawater and chemical environments. Furthermore, it also exhibits good oxidation resistance at moderate temperatures.
- Inconel 718:
Inconel 718 possesses excellent oxidation and corrosion resistance, especially in high-temperature environments. It demonstrates strong resistance to oxidation, sulfidation, and corrosion in extreme environments, including high-temperature oxidizing and acidic environments. Inconel 718 is particularly effective in high-temperature gas environments and environments involving contact with corrosive chemicals.
4. Physical Properties Comparison of Nitronic 50 and Inconel 718
| Property | Nitronic 50 (UNS S20910) | Inconel 718 (UNS N07718) |
|---|---|---|
| Density | 7.8 g/cm³ (0.282 lb/in³) | 8.19 g/cm³ (0.296 lb/in³) |
| Melting Range | 1350 - 1450 °C (2460 - 2640 °F) | 1260 - 1336 °C (2300 - 2440 °F) |
| Specific Heat | 500 J/kg·K at 20°C | 435 J/kg·K at 20°C |
| Thermal Conductivity | 13 W/m·K at 100°C | 11.4 W/m·K at 100°C |
5. Applications Comparison of Nitronic 50 and Inconel 718
| Industry / Sector | Nitronic 50 Applications | Inconel 718 Applications |
|---|---|---|
| Marine | Boat shafts, propeller blades, offshore platforms | - |
| Chemical Processing | Valves, pumps, heat exchangers | Chemical reactors (high-stress, high-temperature environments) |
| Food Processing | Equipment exposed to corrosive environments | - |
| General Engineering | Wear-resistant machine parts, fasteners | - |
| Automotive | Exhaust systems | - |
| Aerospace | - | Jet engine parts, turbine blades, exhaust systems |
| Power Generation | - | Gas turbines and power plant high-temperature components |
| Nuclear | - | Nuclear reactor cores, high-pressure systems |
| Space & Rocketry | - | Rocket engine components (extreme high-temperature and pressure resistance) |
