254SMO Stainless Steel Plate
254SMO (UNS S31254) is a super austenitic stainless steel, renowned as a classic representative of 6% molybdenum steel. It is specifically designed for the most demanding high-chloride, acidic industrial environments and is often used to replace high-cost nickel-based and titanium alloys.
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Product Introduction

254SMO Stainless Steel Plate (UNS S31254 / EN 1.4547) is a premium super austenitic stainless steel designed to withstand the most demanding corrosive environments. Renowned for its exceptionally high molybdenum content (approximately 6.0-6.5%) coupled with elevated levels of chromium, nickel, and nitrogen, it achieves a Pitting Resistance Equivalent Number (PREN) of over 43.

This alloy delivers outstanding resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking (SCC) in high-chloride environments such as seawater, brine, and acidic process streams. Its performance in these harsh conditions can rival that of some nickel-based alloys and titanium, offering a cost-effective, high-performance alternative. With its combination of superior corrosion resistance, high strength, and good weldability, 254SMO is the material of choice for critical applications in industries where equipment longevity and reliability are paramount.

Product parameters


Item / ParameterSpecification for 254SMO (UNS S31254)
Key FeatureUnmatched Chloride Resistance - For seawater, high chloride, and acidic halide environments.
Standard DesignationsUNS S31254, EN 1.4547, F44, 254SMO®
Chemical Composition (Typical wt.%)C: ≤0.020, Cr: 19.5-20.5, Ni: 17.5-18.5, Mo: 6.0-6.5, Cu: 0.5-1.0, N: 0.18-0.22
Mechanical Properties (Annealed Plate)Tensile Strength (Rm): ≥620-655 MPa, Yield Strength (Rp0.2): ≥310-320 MPa, Elongation (A): ≥35-40%
Physical PropertiesDensity: ~8.1 g/cm³, Melting Range: ~1320-1390 °C, Magnetism: Non-magnetic
Primary ApplicationsSeawater desalination plants, flue gas desulfurization (FGD) systems, offshore platforms & piping, chemical & petrochemical processing, pulp bleaching equipment, plate heat exchangers.

Surface selection

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Packaging and transportation

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FACTORY SHOW

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FAQ

Q:What about your price? 
A:Our price is very competitive because we are a factory. Feel free to contact us if you are interested in our products. 

Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.

Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase. 

Q:Does the product have quality inspection before loading? 
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely. 

Q:How about the delivery time? 
A:Within 3-15 days after we confirm you requirement. 

Q:What is your terms of payment ?
A:T/T, L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me. 

Q: Do you provide samples? 
A:Yes,we could offer the sample for you to test but please pay freight fee.

Q:How do we trust your company? 
A:We are a specialized company focusing on global steel trading and supply chain services. Our mission is to provide high-quality, multi-specification, and one-stop steel products and solutions to customers worldwide.

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