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254SMo Stainless Steel Plate - Austenitic High Molybdenum Content Corrosion Resistant S31254 Plate

Certification	ISO, AISI, ASTM
Minimum Order Quantity	50 kg
Price	US $5.25-12.85 / kg

Product Details

Model NO.	S31254 254 Smo	Shape	Flat
Technique	Cold Rolled	Surface Treatment	Bright
Specification	12202440, 15003000, 15006000, 20006000mm	Production Capacity	50000kgs
Iron Content	55.69%	Chromium Content	20%
Nickel Content	18%	Molybdenum Content	6.1%
Nitrogen Content	0.20%	Carbon Content	0.010%
Tensile Strength	680 MPa	Yield Strength	300 MPa
Elongation At Break	50%
Highlight	Austenitic Stainless Steel Plate , High Molybdenum Content 254SMo Plate , Corrosion Resistant S31254 Plate

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Product Description

S31254 254 Smo Material 254 Smo Stainless Steel Plate

254SMo is an austenitic stainless steel developed for use in halide-containing environments such as seawater. This steel demonstrates superior performance particularly in halide-containing acids and features good resistance to uniform corrosion. With carbon content below 0.02%, it is classified as pure austenitic stainless steel, and when carbon content is less than 0.01%, it qualifies as super austenitic stainless steel.

Features of Inox 254SMo

Super stainless steel is a special category of high-alloy stainless steel containing elevated levels of nickel, chromium, and molybdenum. The 6% Mo content in 254SMo provides exceptional local corrosion resistance, including excellent resistance to pitting corrosion (PI ≥ 40) and stress corrosion in demanding environments such as seawater, aeration, gaps, and low-speed scouring. This makes it a viable alternative to nickel-based alloys and titanium alloys.

254SMo offers superior high-temperature resistance and corrosion resistance compared to standard 304 stainless steel. Its metallurgical structure consists of stable austenitic organization, ensuring reliable performance in various applications.

Extensive field testing confirms that 254SMo maintains high crevice corrosion resistance in seawater, even at elevated temperatures—a property shared by only a few stainless steel types. In acidic solutions and oxidizing halide solutions used in paper bleaching, 254SMo demonstrates corrosion resistance comparable to the most resistant nickel-based alloys and titanium alloys.

The high nitrogen content provides 254SMo with enhanced mechanical strength compared to other austenitic stainless steels. Additionally, it offers high ductility, impact strength, and excellent weldability. The elevated molybdenum content results in higher oxidation rates during annealing, producing a slightly rougher surface after pickling than conventional stainless steels, though this does not compromise corrosion resistance.

Specification

Material Standards

Standard	UNS	Werkstoff Nr.	EN	SS	AFNOR
254 SMO	S31254	1.4529	X1CrNiMoCuN20-18-7	2378*	Z1 CNDU 20.18.06AZ*

Chemical Composition

Element	Content (%)
Iron, Fe	55.69
Chromium, Cr	20
Nickel, Ni	18
Molybdenum, Mo	6.1
Nitrogen, N	0.20
Carbon, C	0.010

Mechanical Properties

Properties	Metric	Imperial
Tensile strength	680 MPa	98600 psi
Yield strength	300 MPa	43500 psi
Modulus of elasticity	195 GPa	28300 ksi
Shear modulus	75 GPa	10900 ksi
Poisson's ratio	0.30	0.30
Elongation at break	50 %	50 %
Hardness, Brinell	210	210

254SMo Applications

Ocean: Marine structures in sea environments, seawater desalination, marine aquaculture, seawater heat exchange
Environmental Protection: Flue gas desulfurization for thermal power generation, wastewater treatment
Energy: Nuclear power generation, comprehensive coal utilization, ocean wave power generation
Petrochemical Industry: Refining, chemical equipment
Food: Salt production, soy sauce brewing
High Concentration Chloride Ion Environment: Paper industry, various bleaching devices
Other industrial applications