

UNS N08925 (Alloy 925) ASTM A269 Seamless and welded Pipe: High-Strength Corrosion-Resistant Tubing
UNS N08925 Seamless and welded pipe, commonly known as Alloy 925 or Incoloy 925, is a high-performance nickel-iron-chromium alloy integrated with molybdenum and copper, manufactured in full compliance withASTM A269 and ASME SB677 standards. Designed for extreme corrosive and high-temperature industrial environments, this premium Seamless and welded tubing delivers outstanding resistance to stress corrosion cracking, pitting, crevice corrosion, and oxidation. As an upgraded alternative to conventional 316L stainless steel and standard nickel alloys, ASTM A269 UNS N08925 tubing is widely recognized for its stable mechanical strength and superior chemical durability for global industrial piping systems.
What distinguishes UNS N08925 Alloy 925 Seamless and welded tube from ordinary corrosion-resistant alloys is its low-carbon precision formulation and specialized solution heat treatment. The optimized alloy structure effectively prevents material sensitization during high-temperature service, ensuring reliable performance in harsh acidic, brine, and marine corrosive media. Fabricated through professional hot finishing and cold drawing Seamless and welded processes, the tubing features zero weld defects, excellent pressure tightness, and long-cycle operational stability for critical engineering projects.
The exceptional performance of UNS N08925 corrosion-resistant pipe stems from strictly controlled chemical composition and standardized mechanical parameters. All finished products undergo rigorous hydrostatic testing and non-destructive inspection to meet international engineering certification requirements.
| Chemical Composition (Weight %) |
Mechanical Properties (Room Temperature, Min.) |
||
|
Element |
Specification Range |
Property |
Standard Value |
|
Nickel (Ni) |
42.0 – 46.0 |
Tensile Strength |
≥ 600 MPa (87 ksi) |
|
Chromium (Cr) |
19.5 – 22.5 |
0.2% Yield Strength |
≥ 260 MPa (38 ksi) |
|
Molybdenum (Mo) |
2.5 – 3.5 |
Elongation (50mm) |
≥ 35% |
|
Copper (Cu) |
1.5 – 3.0 |
Hardness |
≤ 220 HBW |
|
Carbon (C) |
≤ 0.025 |
- |
- |
|
Iron (Fe) |
Balance |
- |
- |
The ultra-low-carbon design and balanced alloy ratio makeASTM A269 UNS N08925 Seamless and welded tubing far more resistant to intergranular corrosion and chloride-induced cracking than conventional stainless steel, delivering stable performance in long-term high-temperature and high-corrosion working conditions.
High-strength UNS N08925 Seamless and welded pipe boasts comprehensive industrial advantages for engineering procurement. Its dual anti-oxidation and anti-reduction corrosion capability adapts to complex chemical media environments, effectively extending pipeline service life and lowering maintenance and replacement costs. The material features excellent weldability, machinability, and formability, supporting customized cutting, bending, and precision fabrication for diverse industrial piping solutions.
Compared with high-grade nickel-based alloys, Alloy 925 UNS N08925 tube provides comparable premium corrosion resistance and mechanical stability with a more cost-effective price point. Fully certified by ASTM and ASME international standards, it is applicable for global cross-border industrial projects, including offshore engineering, chemical processing, and oil & gas transportation systems.
UNS N08925 high-temperature corrosion-resistant pipe is extensively used in offshore seawater cooling systems, petrochemical acid medium transmission pipelines, natural gas processing equipment, industrial desulfurization systems, and pharmaceutical chemical piping. It serves as the optimal reliable piping material for high-pressure, high-temperature, and heavy-corrosion industrial scenarios.
For global buyers and engineering teams seeking premium ASTM A269 UNS N08925 Seamless and welded pipe, Alloy 925 tubing integrates standardized quality, exceptional corrosion resistance, stable mechanical properties, and cost efficiency. It is a top-tier industrial piping material that solves complex corrosion and high-temperature operational challenges for modern process industries.