Exceptional Strength and Corrosion Resistance of Nickel Alloy 716 Round Bar

Property	Typical Value
Tensile Strength	1250–1500 MPa
Yield Strength	900–1100 MPa
Elongation	12–20%
Hardness	330–380 HB
Density	8.19 g/cm³
Operating Temperature	Up to 700°C (1290°F)

Strength Mechanisms

1. Precipitation Hardening (Age Hardening)
   Nickel Alloy 716 achieves high strength through gamma double prime (Ni₃Nb) and gamma prime (Ni₃(Al, Ti)) precipitates. These fine, coherent particles block dislocation movement, allowing the alloy to maintain strength at both ambient and elevated temperatures.

2. Solid Solution Strengthening
   Elements like chromium, molybdenum, and iron dissolve into the nickel matrix, strengthening the alloy without compromising ductility.

3. Thermal Stability
   Even after long-term exposure at high temperatures, the alloy resists grain growth and phase coarsening, retaining mechanical stability and preventing creep deformation.

4. Excellent Fatigue Resistance
   The combination of fine-grain structure and stable precipitates ensures superior fatigue performance, making it ideal for rotating parts like turbine shafts, compressor disks, and fasteners.

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Outstanding Corrosion and Oxidation Resistance

While strength is essential, corrosion resistance determines long-term reliability in harsh industrial environments. Nickel Alloy 716 Round Bar is engineered to perform in a wide range of corrosive conditions, including acidic, alkaline, and chloride-rich environments.

Key Corrosion-Resistant Characteristics

1. Resistance to Pitting and Crevice Corrosion
   The presence of chromium and molybdenum in the alloy’s composition enhances resistance to localized corrosion in chloride environments, preventing the formation of pits or cracks that can lead to catastrophic failure.

2. Excellent Oxidation Resistance
   Nickel Alloy 716 maintains its protective oxide layer at elevated temperatures, providing superior resistance to oxidation, scaling, and carburization in air or combustion gas atmospheres.

3. Stress Corrosion Cracking (SCC) Resistance
   The alloy’s nickel-rich matrix prevents stress corrosion cracking even under tensile loads in chloride-containing environments — a significant advantage over many stainless steels.

4. Superior Acid Resistance
   It resists corrosion caused by sulfuric, hydrochloric, and phosphoric acids, making it ideal for use in chemical plants, heat exchangers, and acidic reactors.

5. Hydrogen Embrittlement Resistance
   Nickel Alloy 716 Round Bar exhibits excellent resistance to hydrogen-induced cracking, ensuring reliability in oil and gas production, subsea pipelines, and high-pressure equipment.

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Heat Treatment and Hardening

Nickel Alloy 716 Round Bar is heat treated through a series of precipitation hardening processes designed to optimize its strength and microstructure.

Typical Heat Treatment Steps

1. Solution Annealing: Heated to 980–1010°C (1800–1850°F) followed by rapid cooling to dissolve precipitates and create a uniform microstructure.

2. Aging Treatment: Reheated to 720–760°C (1325–1400°F) for 8–10 hours and then air cooled to form gamma prime and gamma double prime precipitates that improve mechanical strength.

This heat treatment results in a uniform, fine-grained structure with excellent mechanical and corrosion resistance properties. The process also enhances creep resistance, allowing components to perform reliably under sustained high-temperature stress.

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Applications of Nickel Alloy 716 Round Bar

The unique combination of strength, toughness, and corrosion resistance makes Nickel Alloy 716 Round Bar suitable for the most demanding industries.

1. Aerospace Industry

• Turbine shafts, jet engine components, and compressor discs

• Fasteners, bolts, and valve stems that require high strength at elevated temperatures

• Afterburner parts exposed to high oxidation environments

2. Oil and Gas Industry

• Downhole tools, valves, and completion equipment

• Subsea connectors and wellhead components resistant to H₂S and CO₂ environments

• Pressure containment parts that demand superior mechanical and corrosion resistance

3. Chemical Processing and Power Generation

• Heat exchangers, reactor vessels, and distillation columns

• Steam turbine blades and nuclear reactor components exposed to aggressive chemicals and steam

• Corrosive acid-handling systems in petrochemical plants

4. Marine and Offshore Engineering

• Pumps, shafts, and couplings operating in seawater

• Offshore riser systems and subsea manifolds requiring long-term durability

In all these applications, Nickel Alloy 716 Round Bar delivers unmatched reliability under extreme stress, temperature, and corrosive exposure.

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Advantages of Nickel Alloy 716 Round Bar

• High Strength at Elevated Temperatures – Retains mechanical integrity up to 700°C.

• Excellent Corrosion Resistance – Performs well in both oxidizing and reducing environments.

• Superior Fatigue and Creep Resistance – Ideal for dynamic and high-pressure applications.

• Excellent Machinability and Weldability – Can be fabricated using standard processes without losing strength.

• Long Service Life – Reduces maintenance frequency and downtime in harsh operational conditions.

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Why Choose SASAALLOY for Nickel Alloy 716 Round Bar

At SASAALLOY, we specialize in manufacturing and supplying high-quality Nickel Alloy 716 Round Bars that meet the most demanding international standards. Our materials are produced using advanced vacuum induction melting (VIM) and electro-slag remelting (ESR) techniques to ensure superior purity, consistency, and microstructural control.

Each batch undergoes rigorous quality inspections, including chemical analysis, mechanical testing, and non-destructive evaluations to guarantee flawless performance in critical applications.

Whether your project involves aerospace components, subsea systems, or chemical reactors, SASAALLOY provides materials that deliver exceptional strength, corrosion resistance, and reliability under extreme conditions.

By choosing SASAALLOY, you are partnering with a company that understands the complexity of high-performance alloys and provides materials that meet or exceed industry standards for precision, safety, and longevity.

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Conclusion

The Nickel Alloy 716 Round Bar exemplifies the perfect fusion of exceptional strength, toughness, and corrosion resistance, making it one of the most advanced materials available for high-stress industrial applications. Its ability to perform under high temperatures, pressure, and corrosive environments makes it a go-to choice for sectors such as aerospace, oil and gas, marine, and chemical processing.

With its precipitation-hardened structure, Nickel Alloy 716 maintains outstanding mechanical properties over long service periods, ensuring both performance and reliability.

At SASAALLOY, we take pride in supplying Nickel Alloy 716 Round Bars that meet the highest standards of quality and precision. Backed by advanced metallurgical technology and strict testing protocols, SASAALLOY ensures that every bar delivers the durability, consistency, and corrosion resistance your application demands.