High Molybdenum Content 254SMO Stainless Steel Plate - Corrosion Resistant Cold Rolled UNS S31254 Super Austenitic Plate

S31254 F44 1.4547 254SMo two-phase stainless steel overview: High molybdenum content combined with elevated chromium and nitrogen levels provide 254SMO with exceptional resistance to pitting and crevice corrosion. Copper additions enhance corrosion resistance in acidic environments. The high nickel, chromium, and molybdenum content ensures excellent stress corrosion cracking resistance.
Extensive field testing confirms 254SMO maintains high crevice corrosion resistance in seawater, even at elevated temperatures. Its corrosion performance in acidic solutions and oxidizing halide environments matches that of premium nickel-based and titanium alloys. The high nitrogen content provides superior mechanical strength compared to conventional austenitic stainless steels, while maintaining excellent ductility, impact strength, and weldability.

Metallographic structure: 254SMO features a face-centered cubic lattice structure, typically annealed at 1150-1200°C to achieve austenitic microstructure. Minor metal mesophase presence in material centers generally doesn't adversely affect impact strength or corrosion resistance.
Corrosion resistance: The ultra-low carbon content minimizes carbide precipitation risk. 254SMO passes Strauss Test ASTMA262 specification E even after sensitization at 600-1000°C. It demonstrates superior performance in chloride, bromide, and iodide environments where conventional stainless steels suffer pitting, crevice corrosion, or stress corrosion cracking.
In sulfuric acid, 254SMO significantly outperforms 316 stainless steel. While slightly less corrosion-resistant than 904L at high concentrations, it excels in chloride-containing sulfuric acids. 254SMO is suitable for diluted hydrochloric acid applications at ambient temperatures and performs well across various concentrations and temperatures in fluorosilicic and hydrofluoric acids.

We are authorized agents for leading steel manufacturers including TISCO, POSCO, ESS, BAOSTEEL, JISCO, TSINGSHAN, YGJF, LISCO, HONGWANG, BENSTEEL, and international suppliers such as ACERINOX, OUTOKUMPU, Thyssen Krupp, APERAM, NISSHIN, NSSC, and Nippon Yakin Kogyo.
Our comprehensive product range includes 200, 300, and 400 series stainless steel, high-temperature alloys, nickel-based alloys, corrosion-resistant alloys, precision alloys, special alloy steels, cobalt-based alloys, and super austenitic and duplex stainless steels. Product forms include round steel, forgings, steel pipe, steel plate, precision steel strip, flanges, pipe fittings, and fasteners.
All materials are manufactured and tested according to ASTM/ASME, GB, JIS, and other international standards. We maintain substantial inventory of nickel-based alloys, high-temperature alloys, and imported steel plates, supported by imported welding consumables for timely project delivery.

Applications: Petrochemical, aerospace, military equipment, power plant metallurgy, desulfurization systems, chemical fiber machinery, papermaking machinery, pharmaceutical equipment, food industry, ocean transportation, chemical ships, and food machinery.

Surface Finishing: Mirror Polishing, Hairline Finishing, SB, NO.4, Santi Finishing, Anti-finger Print, PVC film Cover, Titanium Colored, Checkered Finishing
Cutting Service: Laser Cutting, Waterjet Cutting, Plasma Cutting, Machine Cutting, Slit Cutting
Bending Service: Bending range for thickness up to 30mm
Welding Service: Comprehensive welding processes available

Packing Options for Sheets:

• Type 1: Wooden pallets with waterproof paper
• Type 2: Wooden pallets with waterproof paper + steel corner protection
• Type 3: Wooden pallets with waterproof paper + steel corner + wooden plates cover
• Type 4: Wooden box

* Each pallet loads approximately 1.5 - 2 Tons
Packing for Coils:
Coils and strips are loaded on #-shaped wooden frames with waterproof paper and plastic film protection.
* Each frame loads up to 6 Tons