Key compositional elements include:
- Nickel (Ni): 40-45% (ensures stability and corrosion resistance) 12
- Chromium (Cr): 11-14% (enhances oxidation resistance) 12
- Molybdenum (Mo): 5-6.5% (improves creep resistance) 25
- Titanium (Ti): 2.8-3.1% (enables age-hardening via γ’ phase precipitation) 12
- Boron (B): 0.01-0.02% (enhances grain boundary strength) 12
Key Performance Characteristics
High-Temperature Strength:
- Retains tensile strength up to 650°C (1202°F) with excellent creep resistance 12.
- Tensile strength: ≥860 MPa; Yield strength: ≥550 MPa 24.
Oxidation & Corrosion Resistance:
- Superior resistance to oxidation and stress corrosion cracking (SCC) in aggressive environments 14.
Thermal Stability:
- Maintains low thermal expansion coefficient and stable elastic modulus across wide temperature ranges 15.
Fabricability:
- Weldable via TIG, MIG, and laser welding with proper pre/post-heat treatment 46.
Production Methods
Incoloy901 round bars are manufactured through:
- Melting & Casting:
- Vacuum induction melting (VIM) ensures high purity and uniform microstructure 34.
- Hot Working:
- Forged or rolled at 980-1150°C (1796-2102°F) to form billets 45.
- Heat Treatment:
- Solution annealing at 1095-1120°C (2003-2048°F) followed by rapid cooling 14.
- Age hardening at 720-760°C (1328-1400°F) to optimize γ’ precipitation 12.
- Finishing:
- Cold drawing or precision grinding for dimensional accuracy and smooth surfaces 36.
Similar Grades
- UNS N09901 (USA), GH901 (China), Nimonic 901 (UK), 4662 (DIN) 13.
Application Fields
Incoloy901 round bars are critical in:
- Aerospace: Turbine casings, sealing rings, and fuel/hydraulic systems 56.
- Oil & Gas: High-pressure valves, sour gas pipelines, and downhole tools 16.
- Power Generation: Nuclear reactor components, turbine shafts, and heat exchangers 15.
- Automotive: Turbocharger systems and exhaust components 6.
- Incoloy901 Round Bar
- UNS N09901 High-Temperature Alloy
- GH901 Nickel-Iron Alloy Supplier
- Age-Hardened Incoloy901 Rod
- Aerospace-Grade Nimonic 901 Stock
Certified suppliers offer Incoloy901 round bars in diameters from 10mm to 300mm, compliant with ASTM B637, AMS 5661, and other global standards
