Sihe Steel
Sihe Steel
Liaocheng Sihe Stainless Steel Material LTD delivers advanced metallurgical solutions configured to your exact dimensional constraints.
High-precision custom tubes optimized for semiconductors and pharmaceutical systems.
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Highly durable welded tubing configured for automotive emissions and exhausts.
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Oxidation-resistant sheets customized for thermal shieldings.
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Designed for severe thermal cycles with optimized heat transfer efficiency.
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Superb stress-corrosion cracking resistance for offshore drilling.
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Smooth inner surface finishings for sanitary applications.
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9.53*1.24mm dimensioning for high-pressure control lines.
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Robust mechanical properties for structural and fluid piping.
Inquire NowIndustrial operations in extreme thermal zones require structural materials capable of holding mechanical stability when exposed to intense oxidation and chemical threats. Stainless Steel 310 (UNS S31000) and its low-carbon derivative, 310S (UNS S31008), represent the gold standard for high-temperature service. Engineered with a high concentration of Chromium (24-26%) and Nickel (19-22%), these austenitic alloys exhibit exceptional resistance to sulfidation, carburization, and thermal fatigue.
The primary advantage of Grade 310S lies in its low carbon chemistry. By keeping carbon content below 0.08%, the precipitation of chromium carbides at grain boundaries is substantially reduced during welding or high-temperature exposure. This protects the material from intergranular corrosion under cyclic thermal loading, ensuring structural integrity in assemblies that require high field welding.
| Element (%) | Chromium (Cr) | Nickel (Ni) | Carbon (C) | Silicon (Si) | Manganese (Mn) |
|---|---|---|---|---|---|
| 310 Grade | 24.00 - 26.00 | 19.00 - 22.00 | 0.25 Max | 1.50 Max | 2.00 Max |
| 310S Grade | 24.00 - 26.00 | 19.00 - 22.00 | 0.08 Max | 1.50 Max | 2.00 Max |
Under operational temperatures between 800°C and 1150°C, ordinary steel alloys rapidly lose their passive layer, prompting catastrophic scaling. 310 stainless steel relies on its chromium-rich matrix to dynamically sustain a robust, protective chromium oxide scale (Cr₂O₃) on the pipe surface. The high nickel content acts in tandem to suppress microstructural phase transformations, shielding the alloy from embrittlement caused by sigma phase development during extended thermal exposures.
With an established manufacturing lineage of over 10 years, Sihe Stainless Steel is a premium supplier of high-alloy coiled tubing and heat exchanger pipes based in China.
Liaocheng Sihe is at the vanguard of pipe processing, implementing engineering protocols that elevate the performance boundary of our alloy products.
By using a controlled, oxygen-free hydrogen gas atmosphere during the heat treatment process, our factory achieves clean, scale-free inner and outer surfaces. This removes the need for acid pickling, minimizing environmental impact while ensuring the structural flexibility required for seamless coiled tubing installations.
Our cold drawing processing routes achieve tight dimensional control. This enables us to maintain an outer diameter tolerance down to +/- 0.05 mm and Wall Thickness variation below 5%, ensuring high stability in critical fittings and valves.
Every meter of 310S tubing undergoes rigorous inspections, including 100% pneumatic/hydrostatic testing, eddy current scanning, flaring, tensile profiling, and ultrasonic wall-thickness mapping to eliminate manufacturing defects.
Our precision-machined tubes and coils deliver reliability across severe environments, from subsea umbilicals to aerospace combustion zones.
Liaocheng, China's core manufacturing district for high-performance tubing, provides structural cost advantages and supply chain resilience. Liaocheng Sihe coordinates every phase of manufacturing, from sourcing raw materials to cold drawing and shipping, helping us mitigate market volatility.
Our raw material feedstock is sourced directly from top-tier domestic steel mills. This ensures alloy composition consistency, avoiding the supply shocks common in international markets.
Our proximity to major global logistics hubs, including Qingdao Port, allows for rapid shipping times. Backed by export packing standards, we protect high-value seamless and coiled tubes from moisture and sea salt corrosion during transit.
We provide full customization for coiled tubing, sheets, and capillary tubes to match your project demands.
We process various materials (e.g., 304, 316L, 2205, 310S) and specifications (outer diameter 6.35mm to 19mm) for stainless steel coils.
Our fabrication capabilities include bending, spiral forming, and precision drawing, designed to fit compact heat exchangers and condensers.
We offer high-precision laser, mechanical, and flame cutting options, delivering straight lengths customized to your dimensions.
We offer specialized surface treatments, including mechanical polishing and electropolishing, to optimize fluid dynamics and cleanliness.
We provide precision flanged ends for secure, leak-free integration into automotive exhaust and chemical processing systems.
Explore our catalog of high-performance alloy products, manufactured to ASTM, EN, and JIS standards.
2205 duplex stainless steel containing austenitic and ferritic phases for superior resistance to chloride stress corrosion.
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1/2 inch stainless steel coiled tubing in extended continuous lengths, designed for seamless industrial instrument installations.
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Premium grade 310/310S coiled tubing designed for high-temperature furnace feeds and petrochemical lines.
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Liaocheng Sihe operates in compliance with international quality management systems. Below are our industry certifications, mill test reports, and export compliance documents.
Browse our complete list of stainless steel sheets, capillary lines, and industrial welded configurations.
High-integrity continuous coils designed for subsea umbilicals.
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Polished decorative and structure tubes featuring a smooth finish.
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Highly durable plates designed for commercial appliances and tanks.
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Titanium-stabilized alloy providing high stability in elevated temperatures.
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Corrosion-resistant micro-bore tubes for laboratory instrumentation.
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Engineered for high strength and pitting resistance in marine environments.
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Welded process piping designed for chemical transport.
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Highly resistant to stress cracking, designed for subsea umbilicals.
View DetailsFind technical answers regarding our manufacturing tolerances, lead times, export standards, and high-temperature alloy capabilities.
