ASTM B163 Inconel 718 Pipe For High-Temperature Corrosive Scenarios In Deep-Sea Oil And Gas
ASTM B163 Inconel 718 Pipe
Description:
ASTM B163 Alloy 718 seamless pipe is the preferred material for extremely high temperature, high pressure and corrosive environments, especially for aerospace, deep-sea oil and gas and nuclear power. Its ultra-high strength and corrosion resistance far exceed conventional stainless steel, but the cost is high. When selecting, it is necessary to comprehensively evaluate the working conditions (temperature, medium, life cycle cost). In severe acidic or ultra-high temperature scenarios, it is recommended to conduct corrosion tests or consult a material engineer.
718 Inconel pipe Material Equivalent Grade
| STANDARD | UNS | EN | WERKSTOFF NR. | JIS | GOST | BS | AFNOR |
| Inconel 718 | N07718 | – | 2.4668 | NCF 718 | – | – | – |
ASTM B163 Inconel 718 Pipe and Tube Chemical Structure
| element | Minimum | Maximum |
| Si | - | 0.035 |
| C | - | 0.008 |
| P | - | 0.0015 |
| Ti | 0.065 | 1.015 |
| Mn | - | 0.035 |
| B | - | 0.06 |
| Al | 0.02 | 0.08 |
| Cr | 17 | 21 |
| Co | - | 1 |
| Fe | Balance | |
| Cu | - | 0.03 |
| Nb | 4.075 | 5.05 |
| Mo | 2.08 | 3.03 |
| Ni | 50 | 55 |
Inconel 718 Pipe and Tube Yield Strength
| Temper | Solution-treated | |
| Tensile Rm | 155 | ksi (minimum) |
| Tensile Rm | 1069 | MPa (minimum) |
| R.p. 0.2% Yield | 95 | ksi (minimum) |
| R.p. 0.2% Yield | 655 | MPa (minimum) |
| Elongation (2” or 4D gl) | 30 | % (minimum) |
Application
Aerospace: jet engine fuel pipelines, rocket propellant delivery pipes.
Oil and gas: high-pressure pipelines for deep-sea drilling equipment, acid gas field (including H₂S/CO₂) gathering and transportation systems.
Nuclear power and energy: nuclear reactor coolant pipelines, high-temperature exhaust components of gas turbines.
Chemical equipment: high-temperature reactor heat exchange tubes, corrosive media (such as Cl⁻, acidic solution) delivery systems.
Material Testing:
Mechanical Testing Such as Tensile of Area
Hardness Test
Chemical Analysis – Spectro Analysis
Positive Material Identification – PMI Testing
Flattening Test
Micro and MacroTest
Pitting Resistance Test
Flaring Test
Intergranular Corrosion (IGC) Test
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