ASTM B167 Inconel 690 Steam Generator Heat Transfer Seamless Tube
ASTM B167 Inconel 690 Steam Generator Heat Transfer Seamless Tube
ASTM B167 is the standard for Inconel 690 seamless pipe. Inconel 690 is a high-performance nickel-chromium-iron alloy pipe widely used in applications such as steam generators due to its excellent high-temperature and corrosion resistance. These pipes are seamless, meaning they lack welds, providing superior sealing and pressure resistance compared to welded pipe. This alloy was chosen for its high strength and corrosion resistance, particularly its resistance to stress corrosion cracking in the high-temperature water found in nuclear power plants.
What is the annealing temperature for Inconel 690?
Alloy 690 is typically used in the annealed condition, and the strength properties described below represent the annealed material. Typical annealing temperatures are approximately 1900°F (1040°C).
Inconel 690 Pipes Chemical Composition
| Grade | C | Mn | Si | S | Co | Fe | Ni |
| Inconel 690 | ≤ 0.15 | ≤ 1 | ≤ 1 | – | 10-15 | Balance |
48.85 – 62
|
Alloy 690 Tubes Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Inconel 690 | 8.3g/cm³ | 1363°C | ≥ 485 MPa | ≥ 275 MPa | 25 % |
Inconel 690 Pipes Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS |
| Inconel 690 | 2.4642 | N06690 |
Material Testing:
Mechanical testing, such as cross-sectional tensile testing
Hardness testing
Chemical analysis - spectroscopy
Positive Material Identification - PMI testing
Flattening testing
Micro- and macroscopic testing
Pitting resistance testing
Flagging testing
Intergranular corrosion (IGC) testing
Nuclear Power Industry:
PWR steam generator heat transfer tubes and primary circuit main piping.
Highly radioactive liquid transport systems in nuclear waste reprocessing facilities.
Chemical and Petrochemical Industry:
Ethylene cracker convection section tubes and sulfuric acid alkylation reactor internals.
High-temperature piping in molten salt energy storage systems (e.g., sodium nitrate/potassium nitrate).
Environmental Energy:
Waste heat recovery piping in waste incinerators (resistant to HCl/dioxin corrosion). High-temperature and high-pressure pipelines of supercritical CO₂ power generation units.
Gnee Steel specializes in the production of various nickel-based alloys. Gnee Steel's product packaging includes steel strapping: Pipes with an outer diameter of 3 inches or less are typically strapped together with polypropylene film to prevent rust during sea transportation, and then secured with steel strapping. Wooden boxes/crates: Pipes are typically packaged in wooden boxes or crates to protect them during transportation, especially those that are longer or have larger diameters. Seaworthy export packaging: Suppliers typically use standard seaworthy export packaging methods, which may include a variety of materials and techniques to protect the pipes during transportation. Tarpaulin packaging: This prevents rain, seawater, and other external factors from penetrating the export wooden crates during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions based on customer needs. For alloy material pricing inquiries or customized alloy material solutions, please contact us for a quote at ss@gneesteel.com.
