In today’s rapidly evolving aerospace and energy industries, the demand for materials that can withstand extreme temperatures, high pressures, and corrosive environments has never been higher. Turbine and engine components are constantly exposed to such conditions, requiring metals that offer not only exceptional strength but also excellent fatigue and oxidation resistance.
Among the wide range of advanced alloys available, the Nickel Alloy 716 Round Bar has become one of the most trusted materials for manufacturing turbine blades, shafts, fasteners, and combustion system parts. With its outstanding mechanical stability, corrosion resistance, and heat tolerance, it stands as a key material for both aerospace and power generation applications.
This article explains why Nickel Alloy 716 Round Bar is considered the ideal choice for turbine and engine components, focusing on its unique properties, performance benefits, and the reliable quality assurance provided by SASAALLOY.
1. Understanding Nickel Alloy 716
Nickel Alloy 716, also known as Inconel 716, is a precipitation-hardenable nickel-chromium-iron alloy specifically engineered to perform under severe service environments. It is chemically and structurally related to Inconel 718, one of the most widely used superalloys in the aerospace industry. However, Alloy 716 offers refined mechanical strength, weldability, and stress-rupture performance.
Typical Chemical Composition (%):
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Nickel (Ni): 50–55
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Chromium (Cr): 17–21
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Iron (Fe): Balance
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Molybdenum (Mo): 2.8–3.3
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Niobium + Tantalum (Nb + Ta): 4.75–5.5
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Titanium (Ti): 0.65–1.15
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Aluminum (Al): 0.2–0.8
This precise balance of elements gives the alloy a unique combination of mechanical strength, corrosion resistance, and oxidation protection, making it highly suitable for high-performance turbine and engine systems.
2. Key Properties of Nickel Alloy 716 Round Bar
The Nickel Alloy 716 Round Bar provides several superior characteristics that make it perfect for turbine and engine applications where safety and performance are critical.
Mechanical Properties:
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Tensile Strength: up to 1300 MPa
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Yield Strength: approximately 1000 MPa
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Elongation: ≥ 15%
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Hardness: Rockwell C 35–45
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Density: 8.19 g/cm³
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Melting Range: 1330–1380°C
Performance Characteristics:
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Excellent resistance to oxidation and hot corrosion
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Exceptional fatigue and creep resistance
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Maintains strength at temperatures up to 700°C
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Outstanding weldability and machinability
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Stable microstructure even under prolonged exposure to heat and stress
These attributes make Nickel Alloy 716 an excellent choice for high-speed rotating components exposed to severe thermal and mechanical conditions.
3. Performance in Turbine Applications
In both aerospace gas turbines and industrial power generation turbines, material reliability is a top priority. The performance of Nickel Alloy 716 in these systems has been proven through decades of successful application.
3.1 Turbine Shafts and Discs
The alloy’s high tensile and yield strength ensure that turbine shafts and discs can handle tremendous rotational forces and torque without deformation. Its creep resistance under sustained high temperatures ensures long-term stability and safety.
3.2 Turbine Blades and Vanes
Turbine blades face continuous exposure to hot gases and oxidation. Nickel Alloy 716 provides superior thermal fatigue resistance and oxidation protection, preventing scaling and extending service life.
3.3 Fasteners and Couplings
For turbine casings and high-stress joints, the alloy’s strength and corrosion resistance make it perfect for bolts, nuts, and couplings that must maintain preload integrity under fluctuating temperatures and vibrations.
3.4 Combustion System Parts
Components in the combustion zone must endure cyclic thermal stress and corrosive gases. Alloy 716 maintains structural integrity under these harsh conditions, ensuring consistent performance in fuel injectors, seals, and liners.
4. Performance in Engine Components
The combination of mechanical strength, corrosion resistance, and thermal stability allows Nickel Alloy 716 Round Bar to be used in a variety of aerospace and industrial engine systems.
4.1 Jet Engine Shafts and Rotors
High-speed jet engines require materials that resist centrifugal force and thermal shock. Nickel Alloy 716 provides the necessary fatigue resistance and dimensional stability during rapid acceleration and deceleration cycles.
4.2 Exhaust and Afterburner Components
In modern aircraft, afterburner sections and exhaust ducts operate in environments exceeding 900°C. Nickel Alloy 716’s superior oxidation resistance ensures that these parts retain performance and shape without surface degradation.
4.3 Engine Mounts and Support Assemblies
The alloy’s combination of strength and flexibility makes it ideal for mounting assemblies and housings that experience both thermal expansion and mechanical vibration.
4.4 Marine and Industrial Engines
In marine and power plant engines, Nickel Alloy 716 withstands saltwater, chemical vapor, and high-pressure steam, reducing corrosion-related maintenance and equipment downtime.
5. Resistance to Corrosion and High Temperatures
One of the biggest advantages of Nickel Alloy 716 Round Bar is its ability to perform in corrosive and high-temperature environments.
5.1 Oxidation and Scaling Resistance
The alloy forms a stable oxide film that protects against scaling and oxidation at temperatures up to 1000°C, which is crucial for turbine and engine components exposed to hot gases.
5.2 Sulfide Stress and Chloride Attack Resistance
In energy and marine systems, exposure to hydrogen sulfide and chlorides can cause cracking and pitting. Nickel Alloy 716 provides strong protection against these effects, meeting NACE MR0175 / ISO 15156 standards.
5.3 Long-Term Structural Stability
Even after years of operation under fluctuating thermal and pressure conditions, the alloy retains its microstructural integrity and mechanical performance, significantly enhancing equipment life.
6. Heat Treatment and Processing
To achieve optimal properties, Nickel Alloy 716 undergoes solution annealing and precipitation hardening processes.
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Solution Annealing: 980–1000°C followed by rapid cooling to refine grain structure and dissolve secondary phases.
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Aging Treatment: 720–780°C for several hours to precipitate strengthening phases, improving tensile and creep strength.
After heat treatment, the alloy can be precisely machined, welded, and forged, ensuring dimensional accuracy and surface quality in finished components.
7. Quality Control and Certification
At SASAALLOY, every Nickel Alloy 716 Round Bar is produced and tested under strict quality management systems to ensure compliance with global standards.
Applicable Standards:
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ASTM B637
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AMS 5662 / AMS 5663
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EN 10204 3.1 / 3.2 Certification
Testing Procedures Include:
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Positive Material Identification (PMI)
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Ultrasonic and Eddy Current Testing
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Tensile and Hardness Testing
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Microstructure and Grain Size Analysis
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Dimensional Inspection and Visual Examination
This comprehensive testing process guarantees the performance, traceability, and safety of every product delivered.
8. Why Choose SASAALLOY
SASAALLOY is a professional manufacturer and supplier of nickel-based superalloys, stainless steels, and corrosion-resistant materials. With decades of experience serving aerospace, power generation, and chemical industries, SASAALLOY ensures superior product quality, technical support, and fast delivery.
Key Advantages of SASAALLOY:
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Advanced melting and forging facilities
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In-house heat treatment and machining capability
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Strict quality control and third-party inspection available
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Customized sizes and specifications according to client drawings
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Global logistics and professional after-sales service
From jet engines to gas turbines, SASAALLOY’s Nickel Alloy 716 Round Bars have proven to deliver outstanding reliability and performance in critical applications where precision and durability are essential.
9. Conclusion
The success and safety of turbine and engine systems rely heavily on the quality of materials used in their construction. Nickel Alloy 716 Round Bar combines high-temperature strength, oxidation resistance, and superior corrosion performance, making it the ideal material for turbine blades, shafts, discs, and fasteners.
Its proven performance in aerospace and power generation applications highlights its role as a key enabler of technological progress. Supported by advanced manufacturing processes and rigorous testing, SASAALLOY continues to supply the global market with Nickel Alloy 716 Round Bars that deliver unmatched quality, durability, and performance in the most demanding environments.
Post time: Nov-03-2025