Seamless Inconel 690 tube is a high-performance nickel-based alloy tube with exceptional corrosion resistance and high-temperature strength, widely used in industrial applications under extreme conditions.
The primary composition of Seamless Inconel 690 tube includes a high nickel content (approximately 58%–63%) and chromium (27%–31%), along with small amounts of iron, manganese, silicon, and other elements. This combination of elements grants Seamless Inconel 690 tube outstanding oxidation and sulfidation resistance, enabling it to remain stable in high-temperature and sulfur-containing environments. Additionally, Seamless Inconel 690 tube exhibits excellent resistance to stress corrosion cracking, particularly in high-temperature aqueous environments, where it demonstrates an extremely low corrosion rate.
In terms of mechanical properties, Seamless Inconel 690 tube possesses high strength and good ductility. Its tensile strength can reach 590 MPa, yield strength is 240 MPa, and elongation exceeds 30%, allowing it to maintain stable mechanical properties across a wide temperature range. Seamless Inconel 690 tube is typically used in the annealed condition and cannot be hardened through heat treatment.
Seamless Inconel 690 tube has good workability and can be manufactured using conventional high-nickel alloy processing techniques. It also exhibits excellent weldability and can be joined using welding materials with compositions similar to the base metal.
The main applications of Seamless Inconel 690 tube include steam generator heat transfer tubes in the nuclear industry, high-temperature furnace tubes and heat exchanger tubes in the petrochemical industry, as well as high-temperature components in the aerospace sector. Seamless Inconel 690 tube is also widely used in glass melting equipment and radioactive waste treatment systems.
Corrosion Resistance
The high chromium content (27%–31%) and high nickel content (58%–63%) of Seamless Inconel 690 tube provide it with excellent corrosion resistance. Seamless Inconel 690 tube exhibits outstanding resistance to various corrosive media, including oxidizing acids, alkaline solutions, and sulfur-containing gases.
High-Temperature Performance
Seamless Inconel 690 tube performs exceptionally well in high-temperature environments. It can operate stably for extended periods at temperatures up to 700°C, while maintaining high strength and good ductility. Its tensile strength can reach 590 MPa, yield strength is 240 MPa, and elongation exceeds 30%.
Excellent Mechanical Properties
Seamless Inconel 690 tube possesses excellent mechanical properties, particularly in high-temperature and corrosive environments. The balance of high strength and high ductility ensures structural integrity under complex working conditions.
Machinability and Weldability
Seamless Inconel 690 tube has good machinability and can be manufactured using conventional high-nickel alloy processing techniques. Additionally, it offers excellent weldability and can be joined using filler metals with compositions similar to the base material. These favorable machining and welding characteristics significantly reduce production costs and manufacturing difficulties.
Nuclear Industry
Seamless Inconel 690 tube is one of the key materials in the nuclear industry, particularly in the heat transfer tubes of steam generators in nuclear power plants. Its superior stress corrosion cracking (SCC) resistance makes Seamless Inconel 690 tube an ideal material for manufacturing critical components in nuclear reactors, ensuring the safety and reliability of nuclear facilities.
Petrochemical Industry
In the petrochemical sector, Seamless Inconel 690 tube is widely used in high-temperature furnace tubes and heat exchanger tubes. It can withstand the dual challenges of high temperature, high pressure, and corrosive media, making it especially suitable for environments containing sulfur-bearing gases and high-temperature steam.
Aerospace
Seamless Inconel 690 tube is also utilized in the aerospace industry, particularly in the manufacturing of high-temperature components. Its excellent high-temperature performance and mechanical properties make it an ideal choice for demanding aerospace applications.
Other Applications
Beyond these major fields, Seamless Inconel 690 tube is also employed in glass melting equipment and radioactive waste treatment systems. In glass melting applications, Seamless Inconel 690 tube can endure high temperatures and chemical attack, ensuring long-term stable operation of the equipment. In radioactive waste treatment, its exceptional corrosion resistance and stability allow for the safe handling and storage of radioactive materials.
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Specifications |
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Dimensions |
• OD: 6mm-250mm (customizable) |
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• WT: 1mm-20mm (customizable) |
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• Length: Up to 12m (standard, customizable) |
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Standards |
• ASTM B163 (Seamless Ni & Ni-Alloy Condenser & Heat-Exchanger Tubes) |
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• ASTM B167 (Seamless Ni-Cr-Fe Alloy Tubes for High-Temp Service) |
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• ASME SB163/SB167 (Pressure Vessel Applications) |
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• EN 10216-5 (European Standard for Pressure Purposes) |
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• NACE MR0175/ISO 15156 (Sour Service Applications) |
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Mechanical Properties |
• Tensile Strength: ≥550MPa |
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• Yield Strength: ≥240MPa |
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• Elongation: ≥30% |
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• Hardness: ≤90 HRB |
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Surface Finish |
• Annealed & Pickled (Matte finish) |
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• Polished (For smooth surface applications) |
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• Bead Blasted (Improved coating adhesion) |
FAQ
Are you a factory or manufacturer?
A: Yes, we are a factory but we generally use our trading company to handle the business abroad. It will be more convenient to receive the remittance and arrange the shipment.
What is the delivery method?
A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to seaport or by air to the closest airport.
Why is your product so cost-effective?
A: We cut out the middlemen in the end-to-end manufacturing process and we obtain raw material directly from its source.
Do you do spot quality inspection or full inspection?
A: 100% full inspection for sure. All unqualified products are discarded.
How do you ensure your lead time?
A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.
What is the MOQ of Seamless Inconel 690 tube ?
A: Depends on quantity, generally, no MOQ limit.
How to pay for it?
A: A bank transfer (T/T) will be acceptable.
What is the delivery time?
A: around 7-20 days which depends on the quantity and production.
What is kind of the package?
A: Generally, we use a carton case or plywood case with protective material inside to ensure the save of cargo
What is the lead time?
A: from order placed to cargo receiving will take around 10-25 days.
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