ASTM B444 Seamless Inconel 625 Alloy Pipe and Tube
- Type: Seamless Pipe and Tube
- NiCrMoNb Alloy, NiCrMoSi Alloy
- Grade: UNS N06625, UNS N06852, UNS N06219
- Outside Diameter (OD): NPS 1/4″ -3″
- Wall Thickness (WT): SCH10, SCH40, SCH80
Features
ASTM B444 Seamless NiCrMoNb Inconel 625 and NiCrMoSi Alloy Pipe & Tube
Inconel 625 Seamless Pipe & Tube Chemical Composition (wt.%)
| UNS No. | (Ni) (%) | (Cr) (%) | (Fe) (%) | (Mo) (%) | (Nb) (%) | (Ta) (%) | (Al) (%) | (Ti) (%) | (Co) (%) | (C) (%) | (Mn) (%) | (Si) (%) | (P) (%) | (S) (%) |
| N06625 | 58.0 min | 20.0-23.0 | 5.0 max | 8.0-10.0 | 3.15-4.15 | – | 0.4 max | 0.4 max | – | 0.1 max | 0.5 max | 0.5 max | 0.015 max | 0.015 max |
| N06852 | 58.0 min | 22.0-24.0 | 5.0 max | 9.0-11.0 | – | – | 0.2 max | 0.6 max | – | 0.03 max | 0.5 max | 0.5 max | 0.015 max | 0.01 max |
| N06219 | 52.5 min | 20.0-23.0 | 2.0 max | 9.0-10.5 | – | – | 0.5 max | 0.15-0.60 | 0.50 max | 0.040 max | 1.0 max | 0.50 max | 0.030 max |
Inconel 625 Seamless Pipe & Tube Mechanical Properties
| Alloy | Tensile Strength (MPa) | Yield Strength (0.2% Offset) (MPa) | Elongation (%) |
| UNS N06625 | 760 min | 345 min | 30 min |
| UNS N06852 | 880 min | 620 min | 30 min |
| UNS N06219 | 1100 min | 760 min | 25 min |
Technical Specifications
| Specification | Value |
| Standard | ASTM B444 Nickel-Chromium-Molybdenum-Niobium Alloys and Nickel-Chromium-Molybdenum-Silicon Alloy Pipe and Tube |
| Grade | UNS N06625 (Inconel 625, Alloy 625, EN 2.4856), UNS N06852, UNS N06219 |
| Manufacturing Process | cold-finished of hot-finished |
| Seam Type | Seamless |
| Pipe Size | Outside Diameter (OD): NPS 1/4″ -3″, Wall Thickness (WT): SCH10, SCH40, SCH80 |
| Tube Size | Outside Diameter (OD): 13.72 -88.9mm, Wall Thickness (WT): 1.65-7.62mm |
| Length | 6000-12000mm |
| Delivery Condition | UNS N06625 is in annealed Grade 1, and solution annealed Grade 2; UNS N06219 and UNS N06852 are in the solution annealed condition |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Test | Chemical analysis, Tensile test, Flattening test, Expansion test, Hydrostatic test, Nondestructive testing (NDE Test), Intergranular corrosion test, Metallographic examination |
Packing
Small Diameter Pipes and Tubes:
End treatment: Beveled or plain ends are capped or plugged with plastic protectors.
Bundling: Smaller diameter pipes and tubes are grouped in bundles.
Protection: Bundles are then covered with seaworthy bags to protect against moisture and damage during transport.
Alternative packaging: Small-diameter pipes can also be loosely packed in plywood boxes instead of bundled in bags for specific needs or handling requirements.
Large Diameter Pipes:
End treatment: Similar to small diameters, beveled or plain ends are likely capped or plugged.
Loose packing: Larger diameter pipes are individually packed and not bundled due to their size and weight.
Protection: Each pipe is covered with a seaworthy bag to protect against the elements and potential damage during shipping.
Application
Chemical Processing: Nickel-chromium-molybdenum-niobium alloys are commonly used in chemical processing plants with critical corrosion resistance. They can withstand corrosive chemicals, acids, and high temperatures.
Oil and Gas Industry: These alloys are utilized in various applications within the oil and gas industry, including downhole tubing, production tubing, and piping systems for offshore platforms. Their resistance to corrosive environments and high temperatures makes them suitable for these demanding conditions.
Aerospace: Nickel-chromium-molybdenum alloys find applications in the aerospace industry due to their high strength, corrosion resistance, and ability to withstand extreme temperatures. They are used in aircraft engines, exhaust systems, and other components subjected to high heat and corrosive environments.
Nuclear Industry: These alloys’ excellent resistance to corrosion and high temperatures make them suitable for use in nuclear power plants. They are used in steam generator tubing, reactor vessels, and piping systems.
Marine Applications: In marine environments where corrosion from seawater is a concern, nickel-chromium-molybdenum alloys are used for piping, tubing, and other components. Their corrosion resistance and high-strength properties make them ideal for offshore platforms, shipbuilding, and marine equipment.
Power Generation: These alloys are also used in power generation plants, mainly when corrosion resistance and high temperatures are essential. They can be found in boilers, heat exchangers, and other components of power generation systems.
