Sihe Steel
Sihe Steel
Explore our elite selection of high-performance steel tubes, heat-exchanger components, and specialty grade alloy systems manufactured to international standards.
When searching for a trusted China 316L stainless steel sheet supplier, global engineering firms prioritize material integrity, precise chemistry metrics, and structural durability. ASTM A240 316L (UNS S31603) is the low-carbon version of standard 316 austenitic stainless steel. The integration of 2-3% Molybdenum (Mo) significantly boosts the material's resistance to localized pitting and crevice corrosion, especially in high-salinity and chloride-rich environments.
For industries operating under harsh offshore oil & gas conditions or high-purity biopharmaceutical pipelines, raw-material verification is critical. Lower carbon composition (maximum 0.030% C) prevents sensitization and chromium-carbide precipitation along grain boundaries during welding, maintaining optimum corrosion-resistance in weld zones.
Empowering world-class industries with cutting-edge stainless steel manufacturing, continuous innovation, and rigorous testing methodologies.
Liaocheng sihe stainless steel material LTD has stood as a pioneer in stainless steel coiled tube, capillary tubing, and sheets. Leveraging six state-of-the-art production lines, we focus on high-durability austenitic alloys (304/304L, 316L, 321, 317L, 309S, 310S), duplex grades (2205, 2507), and superalloys (Incoloy 800, Incoloy 825, Inconel 625).
Our core competitive advantage is built on the deployment of advanced Bright Annealing (BA) technology. By utilizing an offline and online protective gas atmosphere (Hydrogen + Nitrogen), we achieve a pristine, mirror-like surface and optimize the microstructure of the steel tubing. This eliminates internal residual stress without oxidation, saving costs on pickling and mechanical polishing.
| Grade | C (%) | Cr (%) | Ni (%) | Mo (%) | Tensile Strength (MPa) |
|---|---|---|---|---|---|
| 304 / 304L | ≤ 0.030 | 18.0 - 20.0 | 8.0 - 12.0 | - | ≥ 485 |
| 316L | ≤ 0.030 | 16.0 - 18.0 | 10.0 - 14.0 | 2.0 - 3.0 | ≥ 485 |
| 2205 Duplex | ≤ 0.030 | 22.0 - 23.0 | 4.5 - 6.5 | 3.0 - 3.5 | ≥ 655 |
| Incoloy 825 | ≤ 0.05 | 19.5 - 23.5 | 38.0 - 46.0 | 2.5 - 3.5 | ≥ 585 |
From simple custom cutting to advanced bending and flanging, we process stainless steel products to match tight engineering drawings.
We support various materials (e.g., 304, 316L, 2205) and precise specifications (outer diameter 6.35mm to 19mm) for high-tolerance stainless steel coils.
Includes high-precision bending, tight-loop spiral forming, precision drawing, and other custom-engineered processes designed for industrial heat exchangers.
State-of-the-art laser cutting, mechanical cutting, or flame cutting configurations for high-precision, burr-free material length processing.
We dedicate ourselves to developing highly optimized product surfaces (electropolishing, BA, satin, mirror) utilizing state-of-the-art chemical & abrasive technologies.
Providing specialized flange joints commonly used in high-safety automotive exhaust networks, chemical chemical lines, and precision diagnostic connections.
Discover how our premium steel sheets and coiled tube arrays ensure long-term structural viability in standard and extreme environments.
To align with strict international procurement standards (ASME, ASTM, JIS, EN, GB), we execute exhaustive material verification tests on all products. Prior to packaging, our laboratory staff performs 100% pneumatic, hydrostatic, and eddy current tests on seamless coiled tubing.
Tensile and yield testing checks mechanical endurance limits, while flaring, flattening, and bending tests verify mechanical elasticity and weld seams. Our material traceability includes chemical composition verification via PMT spectroscopy, ensuring 100% compliant Mo, Cr, and Ni ratios.
Our quality management operations conform strictly to international standardizations, giving you absolute assurance on structural safety.
Premium metal structures customized for fluid transfer, pressure equipment, and aggressive corrosive environments.
2205 duplex stainless steel combines austenitic and ferritic benefits, providing high yield strength and exceptional chloride stress corrosion cracking resistance.
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1/2-inch stainless steel coiled tubing is designed for chemical injection lines, hydraulic control networks, and subsea instrument linkages.
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Highly heat-resistant 310S grade stainless steel coil tubes optimized for high-temperature furnace piping, oxidation systems, and boiler components.
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Premium structural steel variants, heat exchanger pipes, and oilfield coiled tubes fabricated to survive under high temperatures and corrosive environments.
