Sihe Steel
Sihe Steel
Direct supply from our ISO 9001 certified manufacturing facility in Liaocheng, China.
Premium Grade ASTM 430 stainless steel sheets engineered for industrial structures, featuring stable corrosion resistance and high oxidation tolerance.
Get Latest Price
High-precision polished SUS430 tubes designed for architectural, decorative, and industrial applications requiring superior surface finish quality.
Get Latest Price
Excellent pitting resistance and high tensile strength for offshore drilling operations, petrochemical processing, and hydraulic instrumentation.
Get Latest Price
Specifically developed for marine environments. Incorporates molybdenum for high resistance against localized chloride corrosion.
Get Latest Price
Long-run continuous coiled tubing minimizing connections in downhole oil applications, reducing leak risks and deployment cycles.
Get Latest Price
Highly alloyed austenitic steel formulated for aggressive sulfuric acid systems, chemical treatment tanks, and heat exchangers.
Get Latest Price
Precision caliber tubing ideal for cooling coils, control lines, and gas transportation networks. Strictly meets ASTM standards.
Get Latest Price
Nickel-iron-chromium alloy tube with added copper and molybdenum for outstanding resistance to oxidizing and reducing acids.
Get Latest PriceA B2B Strategic Procurement Whitepaper on Metallurgy, Manufacturing Capabilities, and Global Supply Chains.
In modern industrial fluid networks, high-pressure instrumentation systems, and challenging offshore environments, material integrity is non-negotiable. Liaocheng Sihe Stainless Steel Material LTD operates as a leading specialty manufacturer and direct-to-enterprise supplier of high-grade SS 316 and 316L stainless steel tubing. With six modern production lines and over a decade of metallurgy expertise, we bridge the gap between heavy-duty engineering requirements and cost-effective manufacturing pipelines.
Globally, procurement managers face dual challenges: ensuring strict compliance with regulatory standards (such as ASTM, ASME, EN, and JIS) and mitigating supply-chain vulnerabilities. By engineering our tubing to withstand aggressive chemical exposures and deepwater marine pressures, we offer an ideal long-term solution. Our seamless coiled tubing is customisable in continuous lengths up to 32,800 feet (10,000 meters), eliminating intermediate welding zones where mechanical failure or corrosion typically originates.
Formulated with a low carbon content (max 0.03%) to eliminate carbide precipitation during welding, providing high performance in structural integrity and anti-sensitization. The 2-3% Molybdenum content ensures superior resistance in chloride-dense environments.
Engineered for downhole control networks and subsea chemical injection systems. Our ability to process coils up to 32,800 feet (10,000m) in a single run guarantees minimal joints, lower leakage probability, and streamlined deployment.
Using online atmosphere-controlled recrystallization, we clean and soften our tubes without oxidation. This results in a reflective, ultra-smooth interior surface finish that limits build-up and maintains pure fluid flow.
Key performance indicators that solidify our leadership as a top-tier Chinese exporter.
Procurement departments in critical industries cannot afford standard industrial quality. They require raw materials certified to precise tolerances. Our manufacturing plant adheres strictly to ASTM A269 (General Service Tubing), ASTM A213 (Boiler/Superheater/Heat Exchanger Tubing), JIS G3459, and EN 10216-5 specifications.
Whether it is Duplex 2205 for high chloride stress environments, Inconel 625 for extreme thermal thresholds, or SS 316L for sanitary instrumentation, we maintain complete trace metal profiles on every batch. Each shipment is accompanied by Mill Test Certificates (MTC) conforming to EN 10204 3.1, giving engineering teams structural assurance.
A structural comparison of performance profiles across demanding industrial configurations.
Stainless Steel Grade 316 is a molybdenum-bearing austenitic alloy. The addition of molybdenum significantly increases resistance to localized pitting and crevice corrosion, especially in salt-water and chloride-heavy environments. The low carbon variant, 316L, reduces the vulnerability to intergranular sensitization. When welding standard 316, temperatures between 425°C and 860°C can trigger chromium carbide precipitation at grain boundaries, compromising the local corrosion barrier. SS 316L mitigates this issue, maintaining excellent structural integrity and corrosion resistance in post-welded assemblies.
While SS 304 remains popular for standard applications, it fails under exposure to warm chloride solutions, leading to pitting and Stress Corrosion Cracking (SCC). SS 316 provides the necessary resistance for marine, chemical, and petrochemical plants. For extreme applications, such as deepwater operations, duplex structures like Duplex 2205 and Super Duplex 2507 double the mechanical yield strength while offering superior resistance to chloride SCC. Liaocheng Sihe is equipped to manufacture across these metallurgy boundaries, customising options to match specific operational requirements.
Liaocheng, located in Shandong Province, stands as a major hub for high-grade steel manufacturing in China. By basing our production facility here, we leverage integrated raw material access, specialized metallurgical supply networks, and efficient logistics channels. This enables us to maintain cost efficiencies that we pass directly to our global partners.
We manage the entire production cycle, from cold-drawing to online bright annealing, straight cutting, and coil spooling. By controlling each phase in-house, we eliminate third-party logistics delays and maintain strict quality control. Our facility is optimized to process a wide range of wall thicknesses, up to 0.165 inch (3 millimeters), and outer diameters ranging from 0.125 inch (3.175 millimeters) up to 1 inch (25.4 millimeters).
From custom bending profiles to micro-caliber drawing, we tailor components to your exact drawings.
We support a broad range of materials (including 304, 316L, and 2205) and dimensions (6.35mm to 19mm diameter) for custom stainless steel coils and custom tubing shapes.
We offer precision bending, spiral configurations, and technical drawing options for cooling loops, oil lines, and heat exchangers.
Our facility uses automated laser systems, mechanical shear equipment, and flame-cutting units to ensure precise tolerances and clean ends, minimizing prep work for installation.
We are dedicated to developing new products with advanced technologies, offering a range of options from standard pickled surfaces to mechanically polished and bright-annealed finishes. These treatments meet the sanitary, high-purity requirements of the pharmaceutical and semiconductor sectors.
Our end-forming capabilities include flanged joints and precision flaring. These solutions are optimized for high-vibration applications, including automotive exhaust networks, chemical lines, and precision instrument systems.
Our stainless steel tubes are engineered to operate in the world's most demanding environments.
Every tube is fully tested to meet industry standards before leaving our facility.
We employ a strict quality testing sequence to ensure that all tubes meet demanding industrial specifications:
Essential guidance on metallurgy specifications, lead times, order processes, and delivery terms.
High-alloy components and specialized tubing specifications for critical engineering projects.
Manufactured to European standards, providing high performance in architectural styling, framing, and light-corrosive exhaust configurations.
Get Latest Price
Features tight dimensional tolerances and a uniform finish, optimized for sensor housings, instrumentation lines, and mechanical shafts.
Get Latest Price
Engineered for sour gas applications, chemical processing, and corrosive downhole wells.
Get Latest Price
Nickel-based superalloy tubing designed for extreme temperatures and high pressures, offering resistance against oxidation and scaling.
Get Latest Price
Designed for deepwater umbilical pipelines. Combines high mechanical yield strength with outstanding chloride pitting resistance.
Get Latest Price
Continuous seamless ASTM A269/A213 compliant coils, optimized for chemical transport networks and high-pressure subsea control lines.
Get Latest Price
Provides high yield strength and resistance to stress corrosion cracking under aggressive chloride exposure.
Get Latest Price
Low-carbon precision pipes for sanitary fluid systems, pharmaceutical facilities, and delicate semiconductor installations.
Get Latest Price