Incoloy 945 machined bar represents a next-generation nickel-based superalloy specifically engineered to withstand the most aggressive subsea environments. This advanced material delivers unparalleled resistance to sulfur compounds, seawater corrosion, and high-pressure conditions, making it the premier choice for critical subsea oil and gas components. The precision machining capability of Incoloy 945 bars enables the production of complex geometries required for modern subsea systems while maintaining exceptional material properties.
Item | 800 | 800H | 800HT | 825 | 925 |
C | ≤0.1 | 0.05-0.1 | 0.06-0.1 | ≤0.05 | ≤0.03 |
Mn | ≤1.5 | ≤1.5 | ≤1.5 | ≤1 | ≤1 |
Fe | rest | rest | rest | rest | rest |
P | -- | -- | -- | ≤0.02 | ≤0.03 |
S | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.03 | ≤0.03 |
Si | ≤1 | ≤1 | ≤1 | ≤0.5 | ≤0.5 |
Cu | ≤0.75 | ≤0.75 | ≤0.75 | 1.5-3 | 1.5-3 |
Ni | 30-35 | 30-35 | 30-35 | 38-46 | 42-46 |
Al | 0.15-0.6 | 0.15-0.6 | 0.15-0.6 | 0.2-1 | 0.15-0.5 |
Ti | 0.15-0.6 | 0.15-0.6 | 0.15-0.6 | 0.6-1.2 | 1.9-2.4 |
Cr | 19-23 | 19-23 | 19-23 | 19.5-23.5 | 19.5-23.5 |
Mo | -- | -- | -- | 2.5-3.5 | 2.5-3.5 |
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Material Composition and Key Properties
The alloy's optimized chemistry (Ni-48%, Cr-20.5%, Mo-5.5%, Nb-3.5%, Ti-1.5%) provides:
Extreme resistance to sulfide stress cracking (SSC) in sour service
Unmatched pitting resistance equivalent number (PREN >45)
Exceptional chloride and seawater corrosion resistance
High yield strength (up to 1100 MPa) with good ductility
Excellent fatigue resistance in high-pressure environments
Primary Applications
Subsea Production Systems:
Christmas tree components and valve bodies
Manifold systems and flow control equipment
Connectors and couplings for deepwater applications
ROV intervention tooling and deployment systems
Downhole Equipment:
High-pressure/high-temperature (HPHT) wellhead components
Corrosion-resistant completion tools
Sand control system hardware
Production tubing accessories
Specialty Marine Components:
Seawater pump shafts and impellers
Desalination system critical parts
Offshore platform structural elements
Deep-sea mining equipment components
User Benefits and Selection Criteria
Subsea engineers select Incoloy 945 machined bars for:
Unrivaled corrosion resistance in sulfur-rich and chloride environments
Superior mechanical performance under extreme pressures
Long-term reliability in 25+ year subsea deployments
Weight savings compared to traditional corrosion-resistant alloys
Regulatory compliance with NACE MR0175/ISO 15156 standards
Technical Specifications
Complies with UNS N09945, ASTM B805 standards
Typical yield strength: 760-1100 MPa (depending on heat treatment)
Excellent impact toughness at low temperatures
PREN >45 for superior pitting resistance
Full NACE MR0175 compliance for sour service
Material Advantages Over Alternatives
Superior SSC resistance compared to Incoloy 925
Better chloride resistance than duplex stainless steels
Higher strength potential than Inconel 625
More cost-effective than Hastelloy C-276 for many applications
Better fatigue performance than titanium alloys in certain conditions
Conclusion
Incoloy 945 machined bars provide the ultimate corrosion-resistant solution for mission-critical subsea equipment operating in extreme environments. The combination of exceptional material properties and precision machinability makes this alloy indispensable for offshore oil and gas operations where equipment failure is not an option.
Processing and Availability
Available in diameters from 10mm to 300mm
Precision machining to tight tolerances (±0.025mm)
Custom heat treatment options available
Full material certification and traceability
Special surface finishes for enhanced corrosion resistance
For application-specific engineering support or to discuss your project requirements, contact our technical team for expert guidance on implementing Incoloy 945 in your subsea systems.
