254SMO Stainless Steel Sheet
254SMO Stainless Steel Sheet – Super Austenitic Alloy for Extreme Corrosion Resistance
The 254SMO Stainless Steel Sheet is a premium-grade, super-austenitic stainless steel alloy designed for exceptional resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking. With its high molybdenum (6%), nitrogen, and nickel content, 254SMO offers superior corrosion resistance compared to 316L and duplex stainless steels, making it ideal for highly aggressive environments.
Perfect for industries requiring long-term durability and chemical resistance—marine, chemical processing, desalination, and more.
Available Sizes & Finishes
Thickness: 0.5 mm – 6.0 mm (custom sizes available)
Width: Up to 1500 mm
Length: Standard and cut-to-length options
Surface Finishes: 2B, No.4 (brushed), BA (bright annealed), mirror, or custom-polished
Key Features & Benefits
UNS S31254 / W.Nr. 1.4547
High alloy content: ~20% Cr, 18% Ni, 6% Mo, and added nitrogen
PREN ≥ 42.5 (Pitting Resistance Equivalent Number)
Excellent resistance to chloride-rich environments like seawater and brine
Superior performance in acidic, halide, and high-temperature conditions
Good formability, weldability, and mechanical strength
Long service life = lower maintenance and replacement costs
Typical Chemical Composition (%):
| C | Cr | Ni | Mo | N | Mn | Si | S |
|---|---|---|---|---|---|---|---|
| ≤0.02 | 19.5–20.5 | 17.5–18.5 | 6.0–6.5 | 0.18–0.22 | ≤1.00 | ≤0.80 | ≤0.010 |
Mechanical Properties:
| Property | Value |
|---|---|
| Tensile Strength | ≥ 650 MPa |
| Yield Strength (0.2%) | ≥ 300 MPa |
| Elongation | ≥ 35% |
| Hardness | ≤ 270 HB |
Applications
Marine and Offshore Structures
Desalination Plants – evaporators, brine heaters, tubing
Chemical Process Equipment – heat exchangers, tanks, pumps
Pulp and Paper Industry – bleach plant equipment
Pharmaceutical & Food Processing – hygienic environments
Why Choose 254SMO Stainless Steel Sheet?
Outperforms 304, 316L, and duplex steels in aggressive environments
Ideal alternative to expensive nickel alloys (e.g., Alloy 625, Hastelloy C276)
Global industry standard for severe corrosion resistance
Packaging & Delivery
Protective PVC film on surface
Wooden pallets or crates for safe transport
Worldwide shipping available
Contact Us for a Quote
Looking for a trusted supplier of 254SMO stainless steel sheets? Contact us today for competitive pricing, fast delivery, and mill test certificates.