NS338 Alloy Nickel Based Alloys High Strength Nickel Chromium Molybdenum Alloy

NS338 Alloy Is A High-Strength, Corrosion-Resistant Nickel-Chromium-Molybdenum Alloy.

NS338 Alloy is a high-performance nickel-chromium-molybdenum alloy known for its superior strength, corrosion resistance, and high-temperature stability. It is widely used in harsh environments where durability and resistance to aggressive conditions are crucial. This alloy combines excellent mechanical properties with exceptional resistance to oxidation and corrosion, making it suitable for demanding industrial applications.

Chemical Composition:

NS338 Alloy is characterized by its specific alloying elements:

• Nickel (Ni): 60.0-65.0% – Provides high corrosion resistance, particularly in acidic and chloride environments, and contributes to overall toughness and strength.
• Chromium (Cr): 15.0-20.0% – Enhances resistance to oxidation and improves the alloy's overall resistance to high-temperature environments.
• Molybdenum (Mo): 3.0-5.0% – Increases resistance to pitting, crevice corrosion, and enhances high-temperature strength.
• Iron (Fe): Balance – Forms the base of the alloy and contributes to its mechanical properties.
• Other Elements: Trace amounts of manganese, silicon, and carbon, which help control the alloy’s properties and performance.

Mechanical Properties:

NS338 Alloy exhibits robust mechanical properties:

• Tensile Strength: Approximately 800-950 MPa – Offers high strength, making it suitable for components that endure significant mechanical stress.
• Yield Strength: ≥500 MPa – Provides reliable resistance to deformation under stress.
• Elongation: ≥30% – High ductility allows effective forming and shaping without cracking.
• Density: Approximately 8.0 g/cm³ – Provides a good balance between strength and weight.
• Hardness: Typically Rockwell C 30-40 – Ensures a high level of hardness for wear resistance and durability.

Corrosion Resistance:

NS338 Alloy is highly resistant to various forms of corrosion:

• Oxidation Resistance: Excellent, even at high temperatures due to the high chromium content.
• Pitting and Crevice Corrosion: Outstanding resistance due to the presence of molybdenum.
• Acidic Environments: High resistance to a variety of acids, including sulfuric and hydrochloric acids.

Applications:

NS338 Alloy is used in industries where high performance and durability are essential:

• Chemical Processing: Ideal for equipment like reactors, heat exchangers, and pumps that handle aggressive chemicals.
• Aerospace: Used in aerospace components such as turbine blades and structural parts that require high strength and resistance to extreme conditions.
• Marine Industry: Suitable for marine environments due to its excellent resistance to seawater corrosion.
• Oil and Gas: Employed in downhole tools, valves, and piping that face harsh conditions and require high strength and corrosion resistance.
• Power Generation: Utilized in parts exposed to high temperatures and corrosive environments, such as gas turbines and generators.

Heat Treatment:

NS338 Alloy can be heat treated to enhance its properties:

• Annealing: Softens the alloy to improve machinability and relieve internal stresses.
• Solution Treating: Optimizes the alloy’s microstructure for improved mechanical properties and corrosion resistance.

Summary:

NS338 Alloy is a high-performance nickel-chromium-molybdenum alloy known for its superior strength, toughness, and resistance to corrosion and high temperatures. Its robust chemical composition and versatile applications make it suitable for demanding environments in chemical processing, aerospace, marine, oil and gas, and power generation industries. The alloy’s ability to withstand harsh conditions while maintaining high mechanical properties ensures its reliability in critical applications.