Incoloy 926 Pipe Supplier
What is Incoloy 926 Pipe
Производственные возможности компании Kaysuns
Incoloy 926 Equivalent Designations
- W.Nr. 1.4529
- UNS N08926
- JIS NAS 255NM
- EN X1NiCrMoCuN25-20-7
- GB 00Cr20Ni25Mo6Cu1Nb
- Incoloy 25-6MO / Cronifer 1925 hMo
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Chemical Composition of Incoloy 926 Pipe, wt.%
| Ni | Cr | Пн | N | Cu | C | Mn | Si | п | S | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 24.0 – 26.0% | 19.0 – 21.0% | 6.0 – 7.0% | 0.15 – 0.25% | 0.5 – 1.5% | ≤ 0.020 | ≤ 2.0 | ≤ 0.5 | ≤ 0.03 | ≤ 0.01 | Остаток средств |
Core Role of Key Elements
- High Nickel:
Stabilizes the austenitic structure and provides outstanding resistance to chloride-induced SCC. - Молибден:
Drastically raises the PREN,protecting the inner pipe wall from localized crevice wear and pitting in stagnant seawater. - Азот:
Acts as an interstitial solid-solution strengthener.It boosts the pipe’s overall yield strength and prevents brittle phases from forming during pipe welding. - Ultra-Low Carbon:
Eliminates the risk of sensitization and carbide precipitation at the grain boundaries when the pipe is heated or welded.
How Do The Chemical Properties of Incoloy 926 Compare To Those of 904L?
Mechanical Properties of Incoloy 926 Pipe
| Предел прочности | Предел текучести (смещение 0,2%) | Удлинение | Твердость (макс.) |
|---|---|---|---|
| ≥ 650 MPa (94 ksi) | ≥ 295 MPa (43 ksi) | ≥ 35% | ≤ 250 HBW(99 HRB) |
Key Engineering Insights
Thanks to the interstitial nitrogen atoms in its crystal lattice,an Incoloy 926 pipe has a yield strength roughly 30% higher than conventional austenitic stainless steels like 316L.This allows engineers to design systems with thinner pipe walls,reducing total project weight and material costs.
A minimum elongation value of 35% ensures the material remains highly formable.It can undergo cold bending, forming,and shaping operations during pipeline routing without cracking.
The fully austenitic structure guarantees that the pipe retains superb impact toughness and does not experience a brittle fracture transition,even at sub-zero or cryogenic operating temperatures.
The maximum hardness is capped to maintain optimal machinability and weldability,while also ensuring compliance with oil and gas standards (like NACE MR0175 / ISO 15156) to prevent environmental hydrogen embrittlement.
How Does Temperature Affect The Strength of Incoloy 926 Pipes?
As operating temperatures rise, the mechanical strength of the pipe decreases due to thermal activation.
- High-Temperature Design:While it retains excellent structural stability up to 400℃ (752℉),design engineers must apply de-rating factors.
- Allowable Stress:The allowable stress values drop progressively according to design codes like ASME B31.3 to compensate for the reduction in yield strength at elevated service temperatures.
Can Incoloy 926 Pipes Be Hardened Through Heat Treatment?
Нет.Incoloy 926 is a super-austenitic alloy,meaning it cannot be hardened by thermal processing or quenching.
- Hardening Method:It can only be hardened through cold working(mechanical deformation like cold drawing or rolling).
- Standard Condition:For piping applications,it is almost exclusively supplied in the solution-annealed condition to maximize its corrosion resistance and ductility.
Incoloy 926 Pipe Physical & Thermal Properties
- Density:8.1 g/cm³ (0.293 lb/in³).
- Modulus of Elasticity:195 GPa (28.3 × 106 ksi)
- Magnetic Permeability:1.01,non-magnetic.
- Electrical Resistivity:≈ 1.0μΩ · m
- Melting Range:1320 – 1390℃ (2410 – 2530℉)
- Thermal Conductivity:12 W/m · K (6.9 BTU / h · ft · ℉)
- Specific Heat Capacity:450 J / kg · K (0.107 BTU / lb · ℉)
- Coefficient of Linear Thermal Expansion:≈ 15.5 × 10-6 K-1
Applications for Incoloy 926 Pipe
- Chemical Plant Heat Exchangers
- Sour Gas Production
- Flue Gas Desulfurization (FGD) Scrubbers
- Offshore Oil & Gas Seawater Systems
- Reverse Osmosis Desalination Plants
- Geothermal Energy Extraction
- Fine Chemical & Pharmaceutical Synthesis
- Marine Scrubbers
- Pulp and Paper Bleaching Plants
- Sulfuric and Phosphoric Acid Production
FAQs About Incoloy 926 Pipe
Recommended Fillers:
Alloy 625 (ERNiCrMo-3) or Alloy C-276 (ERNiCrMo-4).When molten Incoloy 926 cools,elements like molybdenum can segregate at the center of the weld,lowering local corrosion resistance.Using a filler metal with an even higher molybdenum content ensures the completed weld joint maintains equal or better corrosion resistance than the base pipe.
Yes. Incoloy 926 is approved under NACE MR0175 / ISO 15156 for use in sour oilfield environments containing hydrogen sulfide.To maintain compliance,the pipe must be supplied in the solution-annealed condition,and its hardness must not exceed the specified threshold.This ensures the piping is fully protected against SSC.
- High Chlorides:
Environments with chloride levels exceeding 1,000 ppm at elevated temperatures(e.g., hot seawater,industrial brines). - Severe Pitting Risks:
Stagnant water systems where crevice corrosion or localized pitting occurs. - High Pressure + Stress:
Applications requiring a yield strength that is roughly 30% to 45% higher than standard 316L.
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- RM901 No.22 Tangjiaqiao Road Wenzhou Китай
- +86 577 8551 1171
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- https://www.kaysuns.com/
