Incoloy 926 is a versatile nickel-iron-chromium-molybdenum alloy that delivers exceptional corrosion resistance in a wide range of harsh environments. This super austenitic alloy provides a superior solution, particularly excelling in applications where standard stainless steel pipes and stainless steel pipe fittings may fail.
What is Incoloy 926 Alloy | UNS N08926
Incoloy 926 is a specialized alloy , a variant within the Incoloy 825 series.It features a higher molybdenum content and the addition of nitrogen , which significantly enhance its resistance to pitting corrosion and crevice corrosion. The alloy’s unique composition makes it the material of choice for environments involving highly corrosive media.
Key Performance of Incoloy 926
This alloy resists a wide range of corrosive elements, including chlorides and acidic substances. Its high molybdenum content effectively prevents pitting corrosion, ensuring reliable performance in marine and chemical environments.
Incoloy 926 maintains mechanical properties at elevated temperatures. Its outstanding strength ensures structural integrity in piping and fittings, making it a dependable choice for demanding applications.
The alloy’s composition effectively counters Stress Corrosion Cracking—A common issue in many stainless steels, particularly pronounced in chloride-rich environments. Its SCC resistance significantly enhances system safety.
Incoloy 926 exhibits excellent weldability and accommodates diverse forming processes. These properties facilitate efficient piping and fitting fabrication, substantially reducing installation time and labor costs.
Chemical Composition
| Element | Ni | Cr | Mo | Fe | Cu | Mn | Si | C | P | S | N |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Content (wt%) | 24.0 – 26.0 | 19.0 – 21.0 | 6.0 – 7.0 | Bal. | 0.5 – 1.5 | ≤1.0 | ≤0.5 | ≤0.02 | ≤0.03 | ≤0.01 | 0.15 – 0.25 |
Mechanical Properties
| Property | Tensile Strength | Yield Strength (0.2% Offset) | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| Value (Typical) | ≥650MPa(94ksi) | ≥290MPa(42ksi) | ≥30 | ≤100 | 8.13g/cm³ |
Incoloy 926 in Pipes and Fittings
- Piping Systems : Incoloy 926 maintains performance in highly corrosive chemical environments marine settings,easily handling high-pressure and high-temperature conditions.
- Heat Exchangers : This alloy is an ideal choice for heat exchanger tubing, withstanding highly corrosive fluids and resisting chloride-induced corrosion to ensure efficient and sage equipment operation.
- Offshore and Marine Engineering : Incoloy 926’s exceptional resistance to pitting and crevice corrosion makes it particularly suitable for seawater systems,ensuring long-term reliability of piping and fittings.
- Chemical Processing : Incoloy 926 withstands corrosive chemicals like sulfuric acid while maintaining structural integrity , effectively preventing leaks and costly downtime losses.
Sourcing and Fabricating Incoloy 825 Alloy
Always request a Material Test Report (MTR). This document confirms the chemical composition and mechanical properties of the material. The MTR ensures the authenticity and reliability of the specific alloy steel batch you receive and verifies its compliance with required specifications.
Select a professional stainless steel pipe and fittings supplier. Choosing suppliers certified to ISO 9001 and CE-PED ensures peace of mind. ISO 9001 certification demonstrates commitment to quality management systems, while CE-PED certification verifies compliance with European market safety standards for pressure equipment.
This alloy requires specific welding and fabrication techniques. High molybdenum content can cause issues if mishandled, making standardized procedures critical. Ensure your team masters proper handling methods, and welders use compatible filler materials and techniques to prevent risks like hot cracking or reduced corrosion resistance.
While Incoloy 926 alloy carries a higher initial cost, its service life far exceeds that of standard alloys. Exceptional durability significantly reduces long-term maintenance and repair expenses while preventing unexpected system failures. The substantial savings from extended service life deliver a high return on the initial investment in Incoloy 926.
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