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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.