1.4466 (X1CrNiMoN25-22-2) Super Austenitic Stainless Steel Round Bar
In the most aggressive chemical environments, ordinary stainless steels simply cannot keep up. For engineers, EPC contractors, and procurement teams working with urea synthesis, sulfuric acid, and phosphoric acid processes, 1.4466 (X1CrNiMoN25-22-2) super austenitic stainless steel round bar delivers the elevated corrosion resistance, mechanical strength, and long-term reliability that demanding service conditions require. Known throughout the industry as "urea-grade" steel, this fully austenitic alloy has become a benchmark material for components exposed to highly corrosive media.
What Is 1.4466 Stainless Steel?
1.4466, designated X1CrNiMoN25-22-2 under EN 10088 and UNS S31050 in ASTM/ASME standards, is a nitrogen-alloyed, molybdenum-bearing super austenitic stainless steel. Its carefully balanced chemistry — roughly 25% chromium, 22% nickel, 2–3% molybdenum, and 0.10–0.16% nitrogen — produces a stable austenitic structure with outstanding resistance to general corrosion, pitting, crevice corrosion, and stress corrosion cracking. The low carbon content (0.02% max) further minimizes the risk of sensitization after welding.
Key Advantages
- Excellent corrosion resistance in urea carbamate, sulfuric acid, and phosphoric acid media
- Superior pitting and crevice corrosion resistance thanks to high Cr, Mo, and N levels
- High mechanical strength with excellent toughness and ductility
- Fully austenitic, non-magnetic structure with strong weldability
- Proven service life in high-pressure urea and chemical plant equipment
Chemical Composition (Typical, wt.%)
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|
| Content | ≤ 0.02 | ≤ 0.40 | ≤ 2.00 | ≤ 0.025 | ≤ 0.010 | 24.0–26.0 | 21.0–23.0 | 2.0–3.0 | 0.10–0.16 |
Mechanical Properties (Solution Annealed)
| Property | Value |
|---|
| Tensile Strength, Rm | 540–740 MPa |
| Yield Strength, Rp0.2 | ≥ 250 MPa |
| Elongation, A | ≥ 40% |
| Hardness | ≤ 230 HB |
| Structure | Fully austenitic |
Typical Applications
- Urea synthesis equipment and high-pressure carbamate service
- Chemical and petrochemical processing vessels, piping, and fittings
- Heat exchangers, condensers, and reactor internals
- Valve parts, pump shafts, flanges, and fasteners
- Pulp and paper, marine, and pollution-control systems
Available Specifications
- Product form: hot-rolled / forged / peeled round bar
- Diameter range: 8 mm – 500 mm (custom sizes available)
- Standard lengths: 3–6 m, or cut to order
- Surface: black, peeled, turned, bright, or polished
- Standards: EN 10088-3, ASTM A479 / A276, ASME
- Test certificates: EN 10204 3.1 / 3.2 (MTC)
Why Source 1.4466 Round Bar From Us
We supply premium 1.4466 (X1CrNiMoN25-22-2) super austenitic stainless steel round bars produced under strict metallurgical control and supplied with full mill test certificates. With a wide size range, flexible cutting, and reliable delivery, we help chemical, fertilizer, and engineering projects worldwide secure the right material for critical service. Contact our team today for specifications, availability, and a competitive quotation.
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