- Grade / Alloy
- Alloy 926
- EN / W.Nr.
- 1.4529X1NiCrMoCuN25-20-7
- AISI / SAE
- —
- UNS
- N08926
- Other names
- 926
- Family
- Austenitic
Chemical composition
Chemical composition
Composition limitsVdTÜV 502 composition limits for Alloy 926, not merged with the general EN ranges.
| Element | Content (% by mass) |
|---|---|
| CCarbon | ≤ 0.02 |
| SiSilicon | ≤ 0.5 |
| MnManganese | ≤ 1 |
| PPhosphorus | ≤ 0.03 |
| SSulfur | ≤ 0.01 |
| NNitrogen | 0.15–0.25 |
| CrChromium | 20–21 |
| NiNickel | 24–26 |
| MoMolybdenum | 6–7 |
| CuCopper | 0.5–1.5 |
Values describe the grade, not the analysis of a specific batch. The applicable product specification and material certificate determine acceptance. A dash does not mean zero.
What kind of material is Alloy 926?
Alloy 926 belongs to the highly alloyed austenitic stainless steels that also include 904L. A molybdenum range of 6–7%, together with nitrogen, supports resistance to pitting and crevice corrosion. It is also identified as UNS N08926. The word “Alloy” does not make it a nickel-base alloy: this is an iron-base super-austenitic stainless steel.
Its role in saline and chemical environments
Seawater circuits, salt-concentration systems and chloride-bearing chemical equipment are established applications. The grade is also considered in certain acid processes. The same chloride concentration can have different effects in a cool liquid and around a hot surface. The value of 926 therefore depends on the fluid, temperature and surface conditions as well as its alloy percentages.
How it differs from 904L and 254 SMO
Higher molybdenum and nitrogen distinguish 926 from 904L in localised-corrosion resistance. Grade 254 SMO is another high-molybdenum super-austenitic steel, but its nickel, chromium, copper and nitrogen ranges differ from 926. Sharing the “6Mo” family description does not establish identical performance in every environment. Service temperature matters alongside the chemistry of the fluid.
Reference values for solution-annealed bar
These room-temperature values are published for solution-annealed bar up to 300 mm. The composition table uses the limits stated for VdTÜV 502; it is not a combined acceptance table for every product standard.
| Property | Value |
|---|---|
| Tensile strength Rm | 600–800 MPa |
| Proof strength Rp0.2 | ≥ 300 MPa |
| Elongation A | ≥ 40% |
Typical application areas
Seawater systems, chemical processing, saline-fluid equipment.
Product and cutting options
Relevant product forms for this material are listed below. Availability varies with grade and dimensions.