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ASTM 254SMo Cold Rolled Stainless Steel Pipe with Bright Surface Hollow Bar

Certification	ISO, AISI, ASTM
Minimum Order Quantity	50 kg
Price	US $2.55-10.85 / kg

Product Details

Model NO.	254smo 1.4547	Shape	Round
Technique	Cold Rolled	Surface Treatment	Bright
Specification	OD 6-630mm	Production Capacity	50000kgs
Carbon Content	0.010%	Chromium Content	20%
Nickel Content	18%	Molybdenum Content	6.1%
Nitrogen Content	0.20%	Tensile Strength	680 MPa
Yield Strength	300 MPa	Elongation At Break	50%
Hardness Brinell	210
Highlight	ASTM 254SMo Stainless Steel Pipe , Cold Rolled Hollow Bar , Bright Surface 254SMo

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Product Description

ASTM 254smo 1.4547 Stainless Steel Pipe Smo254 Hollow Bar

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

Key Features of Inox 254SMo

As a super stainless steel, 254SMo represents a high-alloy stainless steel containing elevated levels of nickel, chromium, and molybdenum. The 6% molybdenum content provides exceptional local corrosion resistance, making it particularly effective against pitting corrosion (PI ≥ 40) and stress corrosion in demanding conditions including seawater, aeration, gaps, and low-speed scouring. This performance makes 254SMo a viable alternative to nickel-based alloys and titanium alloys.

The steel exhibits superior high-temperature resistance and corrosion performance compared to standard 304 stainless steel. Its metallurgical structure consists of a stable austenitic formation, ensuring reliability across various applications.

Extensive field testing confirms 254SMo maintains high crevice corrosion resistance in seawater, even at elevated temperatures—a characteristic shared by only a few stainless steel types. In acidic solutions and oxidizing halide environments typical of paper bleaching processes, 254SMo demonstrates corrosion resistance comparable to premium nickel-based alloys and titanium.

The high nitrogen content enhances mechanical strength beyond conventional austenitic stainless steels, while maintaining excellent ductility, impact strength, and weldability. The elevated molybdenum content results in higher oxidation rates during annealing, producing a slightly rougher surface after pickling than standard stainless steels, though this does not compromise corrosion performance.

Technical Specifications

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

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 operations, chemical processing equipment
Food: Salt production, soy sauce brewing processes
High Chloride Environments: Paper industry applications, various bleaching systems
Other specialized industrial applications