ASTM B677 Seamless UNS N08925, N08926 Alloy Pipe and Tube
- Grade: UNS N08354, UNS N08925, UNS N08926
- Outside Diameter (OD): 6.35-152.4mm
- Wall Thickness (WT): 1.65-8.56mm
Features
ASTM B677 UNS N08925, UNS N08354, and UNS N08926 Seamless Pipe and Tube
Chemical Composition (wt.%)
| Element | UNS N08925 | UNS N08926 | UNS N08354 |
|---|---|---|---|
| Carbon (max) | 0.020 | 0.020 | 0.030 |
| Manganese (max) | 1.0 | 2.00 | 1.00 |
| Phosphorus (max) | 0.045 | 0.03 | 0.030 |
| Sulfur (max) | 0.030 | 0.01 | 0.010 |
| Silicon (max) | 0.50 | 0.5 | 1.00 |
| Nickel | 24.0 to 26.0 | 24.00 to 26.00 | 22.0 to 24.0 |
| Chromium | 19.0 to 21.0 | 19.00 to 21.00 | 34.0 to 36.0 |
| Molybdenum | 6.0 to 7.0 | 6.0 to 7.0 | 7.0 to 8.0 |
| Copper | 0.8 to 1.5 | 0.5 to 1.5 | – |
| Nitrogen | 0.1 to 0.2 | 0.15 to 0.25 | 0.17 to 0.24 |
| Iron | balance | balance | balance |
UNS N08925, N08354, U08296 Mechanical Properties
| Alloy | Temper | Tensile Strength (min) | Yield Strength (0.2% offset, min) | Elongation (min) |
| UNS N08925 | solution annealed | 87 ksi (600 MPa) | 43 ksi (300 MPa) | 40% |
| UNS N08354 | solution annealed | 93 ksi (640 MPa) | 43 ksi (295 MPa) | 40% |
| UNS N08926 | solution annealed | 94 ksi (650 MPa) | 43 ksi (295 MPa) | 35% |
Technical Specifications
| Specification | Value |
| Standard | ASTM B677 Nickel-Iron-Chromium-Molybdenum, Iron-Nickel-Chromium-Molybdenum-Copper, and Nickel-Iron-Chromium-Molybdenum-Nitrogen Seamless Pipe and Tube |
| Grade | UNS N08925 (Alloy 925, Incoloy 925), N08354 (NAS 354N), and N08926 (Alloy 926, INCOLOY 25-6MO, EN 1.4529, X1NiCrMoCuN25-20-7) |
| Manufacturing Process | cold-worked or hot-finished |
| Seam Type | Seamless |
| Pipe Size | Outside Diameter (OD) Range: NPS 1/8″ -6″, Wall Thickness (WT) Range: 1.47 – 13.2mm |
| Length | 6000-12000mm |
| Delivery Condition | Stabilized-annealed condition, Solution-annealed condition, and 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 (NDT), Intergranular corrosion test, Metallographic examination |
Packing
Packed in plywood boxes or covered with seaworthy bags, plain ends with caps, bundled or loosely packed.
Application
UNS N08925 (Alloy 925):
Oil and Gas Industry: Alloy 925 is often used in downhole applications such as tubing, casing, and completion equipment due to its resistance to sour gas environments containing hydrogen sulfide (H2S) and carbon dioxide (CO2).
Chemical Processing: It finds applications in chemical processing plants requiring resistance to corrosive chemicals and high temperatures.
Marine and Offshore: Alloy 925 is utilized in marine and offshore applications where resistance to seawater corrosion and high strength are essential.
UNS N08354 (NAS 354N):
Chemical Processing: NAS 354N is widely used in chemical processing industries for equipment such as reactors, heat exchangers, and piping systems due to its exceptional resistance to corrosive chemicals, including sulfuric acid, phosphoric acid, and chloride solutions, as well as high temperatures.
Desalination: It is utilized in desalination plants for components exposed to corrosive seawater environments, offering excellent resistance to pitting and crevice corrosion.
Pulp and Paper: NAS 354N finds pulp and paper processing applications for equipment handling corrosive chemicals and bleach solutions, providing long-term corrosion resistance and reliability.
UNS N08926 (Alloy 926):
Oil and Gas Industry: Alloy 926 is utilized in oil and gas production and processing facilities where resistance to sour gas environments, including hydrogen sulfide (H2S) and chlorides, is required.
Chemical Processing: It finds applications in chemical processing plants for equipment handling corrosive chemicals and high temperatures.
Desalination: Alloy 926 is used in desalination plants for components exposed to seawater environments.
