Sihe Steel
Sihe Steel
Premium quality precision steel items manufactured to GB, ASTM, ASME, JIS, and EN engineering standards.
AISI 304 stainless steel is the absolute cornerstone of modern industrial manufacturing. Classified as an austenitic chromium-nickel alloy, this material delivers a superior combination of corrosion resistance, structural ductility, and excellent processing characteristics. As global energy, chemical, and precision engineering industries undergo rapid modernization, the demand for highly reliable 304 stainless steel coils has witnessed unprecedented growth.
From subsea extraction umbilical cords exposed to severe marine environments to sterile capillary tubing utilized in biotechnology and high-precision pharmaceutical systems, AISI 304 serves as a reliable alloy solution. Its natural passivating oxide layer provides robust protection against general chemical breakdown, guaranteeing high sanitary integrity and operational longevity.
“Information Gain Advantage: Unlike standard structural metals, AISI 304 maintains stable performance across temperature extremes, offering optimal cryogenic toughness while preserving structural integrity at elevated temperatures up to 800°C. Strategic global supply chains rely heavily on this material's versatility.”
As a leading exporter of stainless steel coils, Liaocheng Sihe Stainless Steel Material LTD manufactures all materials under strict compliance with major international standards. These include GB (China), ASTM / ASME (USA), JIS (Japan), and EN (Europe). This strict adherence ensures that the chemical composition and physical properties align with the demanding safety tolerances required for industrial equipment manufacturing.
| Alloy Grade | Chromium (Cr) % | Nickel (Ni) % | Carbon (C) % Max | Tensile Strength (MPa) Min | Elongation (%) Min |
|---|---|---|---|---|---|
| AISI 304 | 18.0 - 20.0 | 8.0 - 10.5 | 0.08 | 515 | 40% |
| AISI 304L | 18.0 - 20.0 | 8.0 - 12.0 | 0.03 | 485 | 40% |
| AISI 316L | 16.0 - 18.0 | 10.0 - 14.0 | 0.03 | 485 | 40% |
| Duplex 2205 | 22.0 - 23.0 | 4.5 - 6.5 | 0.03 | 655 | 25% |
At Liaocheng Sihe, quality control is driven by advanced production technology. The company runs six precision production lines, including dedicated bright annealing lines. Annealing is a critical thermal process that removes the internal stresses built up during cold drawing. By treating the steel in a controlled protective atmosphere (hydrogen or nitrogen), the metal undergoes recrystallization without oxidation, maintaining a bright, highly aesthetic reflective finish on both internal and external surfaces.
Furthermore, online thermal control prevents intergranular carbide precipitation. This keeps the stainless steel corrosion-resistant and eliminates the need for expensive post-manufacturing acid pickling.
To ensure reliable safety in high-pressure oil, gas, and industrial processing systems, we conduct extensive quality control inspections. Our test procedures include:
Liaocheng Sihe is a leading provider of high-precision stainless steel coil exports to over 30 countries.
By operating six high-capacity manufacturing lines, we manage high-volume orders with short turnaround times. This operational scale ensures consistent production efficiency and reliable supply security.
We supply continuous single-piece coiled tubing lengths up to 32,800 feet (10,000 meters). This reduces structural joints, minimizing potential leak points in subsea control lines.
Serving over 30 countries across Europe, North America, and Southeast Asia, we export 80% of our products worldwide. This global footprint is backed by international logistics compliance.
Providing value-added fabrication to meet custom architectural and engineering requirements.
We process various materials (such as 304, 316L, and 2205) and custom specifications, including outer diameters ranging from 6.35mm to 19mm, tailored to specific client needs.
Our facilities handle structural bending, spiral configuration forming, and precision drawing, producing custom shapes for heat exchanger systems.
We provide industrial laser cutting, mechanical sawing, and flame cutting. This ensures tight dimensional tolerances and clean, burr-free tube ends.
We offer diverse surface finishes, including electrochemical polishing and mechanical polishing, to meet high cleanliness requirements in critical sanitary environments.
Our flanging and end-forming services support reliable mechanical connections in automotive exhaust units, chemical transfer lines, and precision instrument systems.
Where high reliability, corrosion resistance, and structural strength are critical requirements.
Used in industrial heating and cooling systems to optimize thermal transfer efficiency.
Ensures reliable containment of alternative refrigerants at variable operating pressures.
Resists breakdown in environments exposed to volatile organic compounds and mild acids.
Sanitary-grade material that withstands regular Clean-in-Place (CIP) chemicals.
Electropolished tubing designed to prevent bacterial attachment in sterile processing.
Used in superheater tubes and steam transfer systems in modern power stations.
Resists corrosion in deep offshore environments during oil exploration.
Provides structural reliability and high thermal resistance for fuel injection lines.
Our production facilities maintain compliance with international regulatory frameworks, verified by independent testing bodies.
Liaocheng Sihe Stainless Steel Material LTD is an established manufacturer of high-precision stainless steel coiled tubes, polishing tubes, and seamless coiled tubing. Backed by ten years of manufacturing experience, our operations feature modern equipment, proprietary metallurgical processing, and a strong commitment to quality.
To support demanding engineering requirements in marine and subsea environments, we produce stainless steel coiled tubing in sizes ranging from 0.125 inch (3.175 mm) to 1 inch (25.4 mm) in outer diameter, with wall thicknesses up to 0.165 inch (3.0 mm). We offer continuous, joint-free coils in lengths up to 32,800 feet (10,000 meters) to support subsea umbilical installations.
By leveraging continuous bright annealing technology, we process materials online to relieve stress, improve mechanical ductility, and provide high resistance to corrosive media.
Explore our specialized product groups, each manufactured for specific industrial applications.
We process 2205 duplex stainless steel containing a balanced mix of austenite and ferrite phases.
Premium 1/2 inch coiled stainless steel lines designed for hydraulic systems.
We supply high-temperature resistant 310 series stainless steel tubing to global markets.
Seamless coils in various alloys, including 304L, 316L, and Incoloy 825.
Precision micro-bore tubing for chromatography and instrumentation applications.
Straight and U-bend configuration lines optimized for high heat transfer rates.
Austenitic and duplex sheets in standard and custom dimensions.
Cold-rolled, high-surface-finish sheet materials for manufacturing use.
Visual documentation of our production processes, raw material stock, and fabrication activities.
Find clear answers to key purchasing, logistical, and technical questions.
Premium quality precision steel items manufactured to GB, ASTM, ASME, JIS, and EN engineering standards.
