Sihe Steel
Sihe Steel
High-accuracy dimensional specifications customized for Lisbon, Porto, and Algarve engineering standards. Fully conforming to EN 1.4373 and ASTM A269 criteria.
Portugal’s industrial landscape is experiencing a rapid technological evolution. From the metalworking clusters of the Norte region (Porto, Braga) and the high-tech hubs in Aveiro, to the automotive clusters in Setúbal and Sines' petrochemical complexes, demand for high-performance structural materials has surged. Among these materials, the 202 stainless steel polishing tube represents a critical industrial asset. It offers an optimal balance of corrosion resistance, structural strength, and cost-effectiveness, serving as a superior alternative to grade 304 in medium-corrosion environments.
In municipal architecture along the Algarve coast, urban infrastructure projects in Lisbon, and machinery manufacturing networks in the interior, polished tubes are essential. The high specular finish not only satisfies architectural aesthetics but also inhibits the accumulation of particulates and environmental chlorides. This makes cleaning cycles efficient and maintenance costs highly predictable.
Our company, Liaocheng Sihe Stainless Steel Material LTD, bridges the gap between massive Chinese metallurgical capacity and Portuguese precision manufacturing. We supply standard ASTM A269, EN 1.4373, and JIS SUS202 polished tubes directly to distributors and industrial end-users across the Iberian Peninsula, backed by robust documentation, reliable sea logistics, and flexible customization capabilities.
Understanding the exact chemical configuration of Grade 202 is vital for Portuguese design engineers deciding on structural profiles. Grade 202 is an austenitic Cr-Mn-Ni-N stainless steel. By replacing half of the nickel content with manganese and nitrogen, the alloy yields high hardness and structural integrity while maintaining the non-magnetic characteristics of standard 300-series steels.
| Chemical Element | Carbon (C) | Chromium (Cr) | Manganese (Mn) | Nickel (Ni) | Nitrogen (N) | Silicon (Si) | Phosphorus (P) | }
|---|---|---|---|---|---|---|---|
| Typical Weight % | ≤ 0.15% | 17.0% - 19.0% | 7.5% - 10.0% | 4.0% - 6.0% | ≤ 0.25% | ≤ 1.00% | ≤ 0.060% |
Due to the nitrogen addition, Grade 202 exhibits a yield strength of approximately 275 MPa, significantly higher than the 205 MPa typical of Grade 304. This elevated mechanical strength permits engineers to specify thinner wall configurations without compromising structural loading tolerances, resulting in lower shipping weights and material costs.
Our tubes undergo a strict online bright annealing treatment at temperatures ranging from 1040°C to 1080°C, followed by rapid water quenching. This dissolves chromium carbides back into the solid solution matrix, ensuring maximum grain structural uniformity and excellent elongation properties (>40%) for cold bending, flanging, and forming.
Applied extensively in balustrades, commercial glass facades, and handrails throughout Lisbon, Porto, and southern tourist complexes in the Algarve. High-grit mechanical polishing creates a uniform surface that resists ambient marine humidity and airborne salinity.
Supporting Portuguese automotive component manufacturers located around Palmela (Setúbal region). The structural rigidity, thermal resistance, and bright aesthetic profile make 202 tubes perfect for tailpipes, mufflers, and structural bus frames.
Utilized for transportation lines in agricultural machinery, material sorting facilities, and conveyor frames in the central region of Portugal, offering a cost-effective alternative to carbon steels that require constant repainting and surface maintenance.
Operating out of Liaocheng, China’s steel fabrication heartland, Liaocheng Sihe Stainless Steel Material LTD has spent a decade refining processes to guarantee zero-defect international delivery. We run six highly automated mills capable of continuous, high-volume drawing, annealing, and polishing.
For Portuguese enterprises, relying on local European distributors can sometimes lead to localized inventory crunches and high price premiums. By partnering directly with a source factory in China, you secure wholesale pricing advantages, priority production scheduling, and tailored customization. Our facilities feature a complete testing pipeline, including spectroscopic analysis (PMI), hydrostatic pressure testing, and advanced computerized eddy current inspection tables, ensuring every single tube shipped meets international ASTM A269 and DIN/EN standards.
Beyond manufacturing raw polishing tubes, our engineering division offers specialized processing capabilities to deliver components that are directly integration-ready for your assembly line.
Continuous coil runs available in lengths up to 32,800 feet (10,000 meters) without orbital welds. This maximizes system safety and efficiency for specialized heat exchange systems and hydraulic control lines.
Utilizing high-speed fiber lasers and automatic rotary deburring machinery to provide precise lengths. Clean orthogonal cut faces prevent fitment issues during subsequent TIG or orbital welding processes.
We perform 100% mechanical flaring, flattening, and expanding tests on samples from every batch to ensure high ductility and leak-proof sealing under demanding high-pressure assembly situations.
Comprehensive metallurgical products manufactured to international certifications, ensuring seamless alignment with European and Portuguese engineering frameworks.
Liaocheng Sihe Stainless Steel Material LTD is a leading manufacturer specializing in high-performance stainless steel coiled tubes, polishing tubes, and seamless coiled tubing. Utilizing three state-of-the-art production lines specifically for coiling and three dedicated lines for high-grit tube polishing, we align our outputs with the most demanding global standards, including GB, ASTM, ASME, JIS, and EN.
Our raw material sourcing encompasses premium grades: 304/304L, 316L, 321, 317L, 309S, 310S, and INCOLOY 800, alongside advanced alloys like Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625. We serve critical industries globally, supporting sectors from semiconductor fabricators and aerospace systems to deep-sea petroleum exploration. Specializing in long continuous lengths, we provide coiled tubing options from 0.125 inch (3.175 mm) up to 1 inch (25.4 mm) in outer diameter, with wall thicknesses up to 0.165 inch (3 mm), facilitating seamless installations for umbilical systems in offshore energy plants.
Get in touch with our metallurgical engineers today to discuss chemical configurations, target polished finishes (Ra limits), and custom dimensional parameters for your Portuguese operations.
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