Sihe Steel
Sihe Steel
High-performance stainless steel and alloy tubing options, configured for extreme conditions.
Established in China with over ten years of specialized manufacturing experience, Liaocheng Sihe Stainless Steel Material LTD operates three designated lines for stainless steel coil production out of a total of six advanced processing lines. We are an ISO-certified manufacturer delivering premium seamless stainless steel coiled tubing, bright annealed capillary pipes, and corrosion-resistant alloy tubes.
Our infrastructure incorporates modern online bright annealing technology, facilitating critical metallurgical softening treatment without surface oxidation. We strictly observe international production standards including GB, ASTM, ASME, JIS, and EN. Our material catalog extends from basic austenitic grades like 304/304L and 316L to high-alloyed and nickel-based options such as Duplex 2205, Super Duplex 2507, Incoloy 800/825, and Inconel 625. We serve demanding sectors internationally, including subsea oil exploration, aerospace technology, and high-purity semiconductor manufacturing.
Capillary and coiled tubing solutions must withstand high mechanical pressures, cryogenic and elevated temperatures, and aggressive chemicals. Choosing the correct alloy chemistry is critical. Below is the technical specification of the core alloys utilized in our manufacturing facility.
| Alloy Grade | Chemical Profile Highlights | Mechanical Properties | Primary Applications |
|---|---|---|---|
| 304 / 304L | 18% Cr, 8% Ni (Low Carbon) | Tensile: ≥515 MPa, Yield: ≥205 MPa | HVAC, food and beverage processing, general structural tubing |
| 316 / 316L | 16% Cr, 10% Ni, 2% Mo | Tensile: ≥485 MPa, Yield: ≥170 MPa | Chemical delivery, medical instruments, marine heat exchangers |
| Duplex 2205 | 22% Cr, 5% Ni, 3% Mo, 0.18% N | Tensile: ≥655 MPa, Yield: ≥450 MPa | Offshore oil and gas pipelines, desalination, high-pressure instrumentation |
| Incoloy 825 | 38-46% Ni, 19-23.5% Cr, 2.5-3.5% Cu, Mo | Tensile: ≥585 MPa, Yield: ≥240 MPa | Acid processing units, subsea control lines (umbilicals) |
| Inconel 625 | Ni-base, 20-23% Cr, 8-10% Mo, 3.15-4.15% Cb | Tensile: ≥827 MPa, Yield: ≥414 MPa | Aerospace engine fuel systems, extreme temperature exhaust systems |
Operating from the industrial hub of Shandong, Liaocheng Sihe Stainless Steel Material LTD coordinates key geographic and supply chain resources. This local structure delivers high quality and cost-effectiveness to our clients:
Direct partnerships with top-tier domestic refineries ensure reliable control over chemical purity and raw billet quality, minimizing micro-imperfections in drawn tubes.
Our online hydrogen-purged annealing equipment prevents surface oxidation, keeping tube interiors scale-free for clean fluid dynamics.
Our quality verification processes include hydrostatic checks, eddy current tests, flaring, flattening, hardness reviews, and PMI verification.
Custom dimensions, specialized geometries, and finish treatments tailored for challenging projects.
We process coils in grade selections including 304, 316L, and 2205 with outer diameters spanning 6.35mm to 19mm, adjusted for custom configurations.
Our processing includes bending, multi-layer helical coiling, precise drawing, and custom spiral wrapping optimized for condenser assemblies.
We use automated cutting tools to meet specific lengths and straightness tolerances, ensuring clean, deburred tube ends.
We apply mechanical and chemical polishing to provide smooth ID and OD finishes, reducing deposit buildup in sanitary applications.
We fabricate structural ends and flared flanges for high-integrity connections in automotive exhaust pipes, chemical lines, and precision instruments.
Where precision capillary and coiled tubing performs under stress.
Tested materials certified for compliance in international projects.
Further catalog items, including heavy-wall tubes and heat exchanger piping options.
Technical answers regarding product specifications, orders, and quality control.
Our pricing is adjusted based on fluctuations in raw alloy components (including nickel, molybdenum, and chromium) and market variables. To obtain an up-to-date pricelist, contact our sales department with your required alloy grades, dimensional specifications, and expected volumes.
We maintain standard minimum order quantities for international shipments to ensure manufacturing efficiency. If you require smaller volumes, contact our sales representatives to check available stock or scheduled production run overages.
Yes, we provide standard export documentation, including Certificates of Analysis (COA) conforming to EN 10204 3.1, Certificates of Conformance (COC), origin documentation, and export customs paperwork as required.
Standard sample requests are typically processed in approximately 7 days. For bulk production orders, lead times range from 20 to 30 days following receipt of deposit and technical sign-off. If you have specific delivery requirements, please contact our team to arrange scheduling options.
Our standard terms are a 30% deposit in advance, with the remaining 70% balance paid against the copy of the Bill of Lading (B/L). We accept bank wire transfers (T/T), Western Union, and PayPal transfers.
We guarantee that all materials conform to order specifications. If material issues arise, our policy is to evaluate the technical parameters and work with you to resolve the matter.
We pack our products in export-ready wooden crates or spool setups, which secures the tubes during ocean and air transport. Specialized packaging configurations are available on request.
Shipping rates are determined by weight, volume, destination, and selected shipping method. Sea freight is recommended for bulk orders to control logistics costs. Contact our shipping department to request freight quotes.