NPS 1 Inch Alloy 254 Pipe - Corrosion Resistant High Molybdenum Content Stainless Steel Seamless Tube for Seawater Applications
Price:
2.55
MOQ:
50
Delivery Time:
Negotiable
Product Description
NPS 1 Inch Alloy 254 (UNS S31254) Stainless Steel Pipe
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 qualifies as a pure austenitic stainless steel, and when carbon content is under 0.01%, it can be classified as a 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, including strong resistance to pitting corrosion (PI ≥ 40) and stress corrosion in demanding conditions like seawater, aeration, gaps, and low-speed scouring. This makes it an excellent alternative to nickel-based alloys and titanium alloys.
254SMo exhibits superior high-temperature resistance and corrosion performance compared to standard 304 stainless steel. Its stable austenitic metallurgical structure ensures reliable performance across various applications.
Extensive field testing confirms 254SMo's 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 environments typical of paper bleaching processes, 254SMo demonstrates corrosion resistance comparable to the most advanced nickel-based alloys and titanium alloys.
The high nitrogen content provides enhanced mechanical strength relative to other 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 conventional stainless steels, though this does not compromise corrosion resistance.
Material Specifications
International 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 |
Application Areas
- 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 Industry: Salt production, soy sauce brewing processes
- High Chloride Environments: Paper industry applications, various bleaching systems
- Other specialized industrial applications
Product Images
Related Designations
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
TSING SHAN STEEL INDUSTRIAL LIMITED
Location
NO.288,Youyi Road Xi Shan Dristrict , Wuxi, Jiangsu, China
Contact Person
Gao Ben