NIMONIC 901 rods are high-performance, age-hardenable nickel-iron-chromium superalloys, specifically engineered for demanding applications requiring exceptional strength and resistance to thermal creep deformation. These rods are particularly suitable for components operating at temperatures up to 600°C (1100°F), such as gas turbine engine discs, shafts, rings, casings, and seals.

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Chemical Composition:

*Balance refers to the remaining composition after accounting for the listed elements.

Physical Properties:

• Density: 8.14 Mg/m³ (0.294 lb/in³)​

• Melting Range: 1280-1345°C (2336-2453°F)​

• Specific Heat: 431 J/kg·°C at 20°C (0.103 Btu/lb·°F at 68°F)​

• Electrical Resistivity: 112 µΩ·cm at 20°C​

Mechanical Properties:

*Note: Mechanical properties are based on data from vacuum-refined, extruded, and forged bar specimens.

Applications:

NIMONIC 901 rods are extensively utilized in high-temperature applications, including:​

• Gas turbine engine components​

• Aerospace structural parts​

• Industrial gas turbines​

• Sealing components in high-temperature environments​

Frequently Asked Questions (FAQs):

1. What is the maximum operating temperature for NIMONIC 901 rods?

   NIMONIC 901 rods are designed for optimal performance in applications up to 600°C (1100°F).

2. What heat treatment processes are recommended for NIMONIC 901 rods?

   The recommended heat treatment involves a three-stage process:

   • Solution treatment at 1090°C (1994°F) for 3 hours, followed by water quenching​

   • Aging at 775°C (1427°F) for 4 hours, followed by air cooling​

   • Final aging at 705-720°C (1301-1328°F) for 24 hours, followed by air cooling​

3. How does the thermal expansion of NIMONIC 901 rods vary with temperature?

   The mean coefficient of linear thermal expansion decreases with increasing temperature, starting at 201 µm/m·°C (29.2 × 10⁻⁶ in/in·°F) at 20°C (68°F) and reducing to 126 µm/m·°C (18.3 × 10⁻⁶ in/in·°F) at 1000°C (1832°F).