ASTM B673 Welded UNS N08925, N08354, N08926 Alloy Pipe
- Grade: UNS N08925, UNS N08354, UNS N08926
- Outside Diameter (OD): NPS 1/8″ -30″ (10.3-762mm)
- Wall Thickness (WT): SCH 5S, 10S, 40S, 80S, 160S
ASTM B673 UNS N08925 N08354 and N08926 Welded Pipe
Golden Sunbird Metals supplies ASTM B673 welded alloy pipe in UNS N08925, UNS N08354, and UNS N08926, engineered for superior performance in aggressive and highly corrosive environments. These advanced nickel–iron–chromium–molybdenum alloys are specifically designed to provide outstanding resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking, making them ideal for critical industrial applications. Manufactured in strict accordance with ASTM B673 specifications, these welded pipes are produced from flat-rolled materials using automatic welding processes and are solution-annealed to ensure optimal mechanical properties and corrosion resistance. The combination of high nickel, chromium, molybdenum, and nitrogen content delivers excellent durability in both reducing and oxidizing media, including sulfuric, phosphoric, and chloride-rich environments. Widely used in offshore oil & gas, chemical processing, marine engineering, and pollution control systems, Golden Sunbird Metals’ ASTM B673 alloy pipes offer reliable, long-term performance for demanding global projects where material integrity and corrosion resistance are critical.
Chemical Composition (wt.%) of ASTM B673 Welded UNS N08925, N08354, N08926 Alloy Pipe
| Element | UNS N08925 | UNS N08354 | UNS N08926 |
|---|---|---|---|
| Carbon (max) | 0.020% | 0.030% | 0.020% |
| Manganese (max) | 1.0% | 1.00% | 2.00% |
| Phosphorus (max) | 0.045% | 0.030% | 0.030% |
| Sulfur (max) | 0.030% | 0.010% | 0.010% |
| Silicon (max) | 0.50% | 1.00% | 0.50% |
| Nickel | 24.0 to 26.0% | 34.0 to 36.0% | 24.00 to 26.00% |
| Chromium | 19.0 to 21.0% | 22.0 to 24.0% | 19.00 to 21.00% |
| Molybdenum | 6.0 to 7.0% | 7.0 to 8.0% | 6.0 to 7.0% |
| Copper | 0.8 to 1.5% | – | 0.5 to 1.5% |
| Nitrogen | 0.1 to 0.2% | 0.17 to 0.24% | 0.15 to 0.25% |
| Iron (Balance) | Balance | Balance | Balance |
Mechanical Properties of ASTM B673 Welded UNS N08925, N08354, N08926 Alloy Pipe
| Alloy | Tensile Strength (min) | Yield Strength (0.2% Offset, min) | Elongation (min) |
| UNS N08925 | 87,000 psi (600 MPa) | 43,000 psi (300 MPa) | 40% |
| UNS N08354 | 93,000 psi (640 MPa) | 43,000 psi (295 MPa) | 40% |
| UNS N08926 | 94,000 psi (650 MPa) | 43,000 psi (295 MPa) | 35% |
Features
- Welded pipe covered by ASTM B673 for general corrosion applications.
- High resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking.
- Excellent performance in seawater, brackish water, and other chloride-bearing media.
- Suitable for aggressive chemical processing environments and severe industrial service.
- Available in welded, cold-worked, and solution-treated classes per ASTM B673.
Technical Specifications
| Specification | Value |
| Standard | ASTM B673 Nickel-Iron-Chromium-Molybdenum and Iron-Nickel-Chromium-Molybdenum-Copper Welded Pipe |
| Grade | UNS N08925, UNS 8354, and UNS N08926 |
| Manufacturing Process | Automatic welding |
| Seam Type | Welded |
| Welded Pipe SPS Diameters | Outside Diameter (OD) Range: NPS 1/8″-30″ (10.3-762mm), Wall Thickness (WT) Range: SCH5, SCH10, SCH40, SCH80, SCH160 (1.65-33.32mm) |
| Length | 6000-12000mm |
| Delivery Condition | Annealed |
| 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 |
Applications
- Seawater piping systems, seawater cooling lines, and desalination plants.
- Offshore platforms, marine equipment, and subsea service lines.
- Heat exchangers and condensers exposed to chloride-rich process streams.
- Chemical processing piping, reactors, and transfer lines handling corrosive media.
- Pulp and paper bleaching systems, flue gas desulfurization, and pollution control equipment.
