Nimonic 901（UNS N09901）

UNS N09901 (Nimonic 901) Product Introduction

Overview:
UNS N09901, commonly known as Nimonic 901, is a nickel-based precipitation-hardenable superalloy designed for applications requiring high strength, excellent thermal stability, and outstanding corrosion resistance in high-temperature environments. The alloy is particularly suitable for turbine components, shafts, and other critical parts subjected to extreme mechanical and thermal stresses.

Key Features:

High-Temperature Strength:

• Maintains excellent tensile and creep-rupture strength up to 650°C (1200°F).

Corrosion and Oxidation Resistance:

• Resists oxidation and corrosion in harsh environments, including gas turbine applications.

Age-Hardenable:

• Strengthened by precipitation hardening, resulting in enhanced durability and long service life.

Good Fabricability:

• Easily machinable and weldable, allowing for the production of complex components.

Thermal Stability:

• Stable microstructure, even after prolonged exposure to elevated temperatures.

Chemical Composition (Typical):

• Nickel (Ni): 41–43%
• Chromium (Cr): 11–14%
• Iron (Fe): Balance (~35%)
• Molybdenum (Mo): 5–6.5%
• Titanium (Ti): 2.2–3.2%
• Aluminum (Al): 0.2–1%
• Cobalt (Co): ≤1%
• Manganese (Mn): ≤1%
• Silicon (Si): ≤0.5%
• Carbon (C): ≤0.1%
• Boron (B): ≤0.01%

Applications:

Aerospace Industry:

• Turbine discs, shafts, and blades in jet engines and gas turbines.

Power Generation:

• Components in steam and gas turbines, such as fasteners and rotor parts.

Automotive Industry:

• High-performance engine components requiring thermal and corrosion resistance.

Industrial Equipment:

• High-temperature fasteners, furnace parts, and structural components.

Marine Applications:

• Components exposed to high-temperature and corrosive environments in marine systems.

Physical Properties:

• Density: 8.1 g/cm³
• Melting Range: 1320–1350°C (2408–2462°F)
• Elastic Modulus: ~200 GPa
• Thermal Conductivity: ~11 W/m·K (at room temperature)

Standards and Specifications: UNS N09901 complies with various industry standards for quality and performance, including:

• AMS 5660, 5661, 5662: Bar and Forgings
• AMS 5663: Heat-treated parts
• ASTM B637: Precipitation-hardened bars and forgings
• ISO 15156-3: Suitable for sour gas service applications.

Advantages:

• High mechanical strength and excellent resistance to thermal creep.
• Superior corrosion and oxidation resistance in high-temperature environments.
• Prolonged service life, reducing maintenance and operational costs.
• Versatile for both static and dynamic high-temperature applications.

Conclusion:
UNS N09901 (Nimonic 901) is a reliable and versatile superalloy tailored for challenging environments. Its unique combination of strength, thermal stability, and corrosion resistance makes it an excellent choice for aerospace, power generation, and other demanding industrial applications.

For additional information or to discuss specific requirements, feel free to contact your materials supplier.