ASTM 254SMo 1.4547 Corrosion Resistant Stainless Steel Pipe with High Molybdenum Content for Seawater Applications
Price:
2.55
MOQ:
50
Delivery Time:
Negotiable
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
Super stainless steel represents a specialized category of stainless steel distinguished from ordinary grades by its high alloy content of nickel, chromium, and molybdenum. The most prominent example is 254SMo, containing 6% molybdenum, which provides exceptional local corrosion resistance.
This stainless steel offers superior resistance to pitting corrosion (PI ≥ 40) and stress corrosion cracking in demanding conditions including seawater, aeration, crevice environments, and low-speed scouring applications. These properties make it an excellent alternative to nickel-based alloys and titanium alloys.
254SMo exhibits outstanding high-temperature resistance and corrosion performance that surpasses 304 stainless steel capabilities. Metallurgically, this special stainless steel maintains a stable austenitic structure.
Extensive field testing and practical experience confirm that 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 the most advanced nickel-based alloys and titanium.
The high nitrogen content in 254SMo provides enhanced mechanical strength compared to other austenitic stainless steels. Additionally, this grade offers excellent ductility, impact strength, and weldability. The substantial 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.
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 Concentration Chloride Environments: Paper industry applications, various bleaching systems
- Other specialized industrial applications
Material Designations
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Company
TSING SHAN STEEL INDUSTRIAL LIMITED
Location
NO.288,Youyi Road Xi Shan Dristrict , Wuxi, Jiangsu, China
Contact Person
Gao Ben