Products Description
Our Advantages
1. Strong Corrosion Resistance
Our UNS N08825 Nickel Alloy Tubes have passed pitting and crevice corrosion tests, demonstrating excellent resistance to sulfuric acid, phosphoric acid, and seawater, making them ideal for industries such as chemical processing, seawater desalination, and marine engineering.
2. Strong Mechanical Properties
Our pipes undergo mechanical testing to ensure compliance with ASTM B704 standards, capable of withstanding significant deformation without breakage.
3. High-Quality Welds
Our welded pipes utilize TIG welding, resulting in clean welds and precise dimensions. Non-destructive testing and mechanical property testing ensure the pipes are free of defects and cracks.
4. High-Temperature Resistance
UNS N08825 exhibits excellent performance at high temperatures, resisting oxidation up to 1,000°F (538°C). It maintains its strength and corrosion resistance even at high temperatures, making it ideal for heat exchangers, boiler tubes, and other high-stress systems.
5. Precise Dimensions
Our welded pipes undergo precision cold drawing, ensuring accurate pipe dimensions. Furthermore, after welding, the pipes are straightened using a CNC straightening machine to ensure a straightness tolerance of ≤1 mm/m.
6. Surface Treatment
Our pipes undergo pickling and passivation treatment to enhance their corrosion resistance. They are also polished for a high degree of surface finish. Shot peening and electroplating are also available as surface treatments.
application areas
- Chemical processing industry: Heat exchangers, reaction vessels, valves, and piping systems used in environments frequently exposed to corrosive chemicals and high temperatures.
- Oil and gas industry: Heat exchangers and cooling systems for subsea pipelines, offshore drilling platforms, and refineries.
- Power generation: Boiler tubes and heat exchangers, as well as cooling systems.
- Marine and offshore: Seawater cooling systems, offshore oil platforms, ship exhaust systems, and seawater pipelines.
- Aerospace: Gas turbines, engine components, and turbine blades.
Chemical Composition
| Element | Nickel | Chromium | Molybdenum | Iron | Titanium | Aluminum | Cobalt | Copper |
|---|---|---|---|---|---|---|---|---|
| UNS N06625 (Alloy 625) | Balance | 20-23% | 8-10% | 5% Max | 0.4-1.0% | 0.4-0.6% | - | - |
| UNS N06219 (Alloy 617) | Balance | 20-23% | 1-3% | 4% Max | - | 1.0-1.5% | 12-15% | - |
| UNS N08825 (Alloy 825) | 38-46% | 19-23% | 2.5-3.5% | Balance | 0.6-1.2% | - | - | 1.5-3.0% |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| UNS N06625 (Alloy 625) | 70,000 psi (483 MPa) Min | 30,000 psi (207 MPa) Min | 30% (in 2 inches) | Max. HRC 70 |
| UNS N06219 (Alloy 617) | 80,000 psi (552 MPa) Min | 40,000 psi (276 MPa) Min | 30% (in 2 inches) | Max. HRC 70 |
| UNS N08825 (Alloy 825) | 55,000 psi (379 MPa) Min | 30,000 psi (207 MPa) Min | 30% (in 2 inches) | Max. HRC 70 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| UNS N06025 | This grade is similar to Alloy 625, but offers superior low-cycle fatigue properties, making it suitable for high-temperature, high-stress environments. |
| UNS N07718 | It is a high-strength, corrosion-resistant alloy suitable for turbine engines, gas turbines, and other aerospace components. |
| Alloy 904L | It is a high-alloy stainless steel with excellent resistance to various corrosive environments, including sulfuric acid, but its performance at high temperatures is inferior to that of Alloy 825. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
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