ASTM B423 Carbon Steel Tube UNS N08825 Inconel 825 Seamless Alloy Steel Tube For Oil And Gas Industry
Material and Specification
The ASTM B423 Carbon Steel Tube is manufactured using UNS N08825 Inconel 825, a high-strength, corrosion-resistant nickel-iron-chromium alloy. This seamless alloy steel tube is specially designed for applications in the oil and gas industry, where resistance to harsh environments and high-pressure conditions is crucial.
Key Features
The ASTM B423 Carbon Steel Tube exhibits several key features that make it ideal for use in the oil and gas industry:
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Corrosion Resistance: Inconel 825 offers exceptional resistance to various corrosive media such as sulfuric and phosphoric acids, chloride ions, and oxidizing environments.
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High-Strength: This alloy steel tube maintains its mechanical strength even at elevated temperatures, making it suitable for applications in extreme conditions.
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Seamless Design: The seamless construction of the tube ensures excellent integrity, reducing the risk of leaks and ensuring a smooth flow of fluids.
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Versatile Application: The ASTM B423 tube can be used in a wide range of applications within the oil and gas industry, including well equipment, offshore platforms, and pipelines.
Chemical Composition
The table below presents the chemical composition of ASTM B423 Carbon Steel Tube UNS N08825 Inconel 825:
| Element | Minimum (%) | Maximum (%) |
| Nickel (Ni) | 38.0 | 46.0 |
| Chromium (Cr) | 19.5 | 23.5 |
| Iron (Fe) | 22.0 | 30.0 |
| Molybdenum (Mo) | 2.5 | 3.5 |
| Copper (Cu) | 1.5 | 3.0 |
| Manganese (Mn) | - | 1.0 |
| Silicon (Si) | - | 0.5 |
| Sulfur (S) | - | 0.02 |
| Carbon (C) | - | 0.05 |
| Aluminum (Al) | 0.2 | 0.6 |
| Titanium (Ti) | 0.6 | 1.2 |
Mechanical Properties
The following table outlines the mechanical properties of the ASTM B423 Carbon Steel Tube UNS N08825 Inconel 825:
| Property | Value |
| Tensile Strength | 85,000 psi |
| Yield Strength (0.2%) | 35,000 psi |
| Elongation | 30% |
| Hardness | HRB 80 |
| Density | 8.14 g/cm³ |
| Melting Point | 1,370 °C |
| Coefficient of Expansion | 13.3 µm/m·K |
Steel Grade
The steel grade for the ASTM B423 Carbon Steel Tube is UNS N08825 Inconel 825, which is a nickel-iron-chromium alloy with excellent corrosion resistance and high mechanical strength properties.
Application
The ASTM B423 Carbon Steel Tube finds widespread application in the oil and gas industry, specifically in areas requiring resistance to corrosive environments and challenging operating conditions. Some of its primary uses include:
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Well Equipment: The tube is utilized in the construction of wellheads, downhole casings, and other components exposed to corrosive fluids and high temperatures.
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Offshore Platforms: Inconel 825 tubes are employed for various offshore oil and gas production platforms, including riser tubes, flow lines, and umbilical tubes.
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Pipelines: The alloy steel tube serves as a reliable material for oil and gas pipelines, offering resistance to corrosive fluids and ensuring long-term integrity under extreme pressure conditions.
Possible Alternative Grades
While the ASTM B423 Carbon Steel Tube using UNS N08825 Inconel 825 is the recommended grade for its specific properties, alternative grades that possess similar characteristics include Inconel 625 and Hastelloy C276. However, it is essential to consider specific application requirements and consult with experts to determine the most suitable alternative if needed.
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