Sihe Steel
Sihe Steel
High precision capillary tubes, coiled tubing assemblies, and customized heat exchanger pipes. Direct mill pricing.
Stainless steel 304, designated as UNS S30400 or EN 1.4301, is the most versatile and widely utilized austenitic alloy on the planet. Recognized for its excellent weldability, formability, and general corrosion resistance, it forms the backbone of critical industrial fluid networks. At Liaocheng Sihe Stainless Steel Material LTD, we fabricate advanced variations including standard 304, ultra-low carbon 304L, and stabilized variants.
When evaluating 304 stainless steel pricing structure, it is critical to address the underlying metallurgical inputs. The LME Nickel index, global ferrochrome surcharges, and energy costs are key drivers of the final product quotation. Below is a detailed breakdown of the chemical specifications for the key grades we manufacture.
| Grade | Carbon (C) Max | Chromium (Cr) | Nickel (Ni) | Manganese (Mn) Max | Silicon (Si) Max | Phosphorus (P) Max |
|---|---|---|---|---|---|---|
| 304 (UNS S30400) | 0.08% | 18.0 - 20.0% | 8.0 - 10.5% | 2.0% | 0.75% | 0.045% |
| 304L (UNS S30403) | 0.03% | 18.0 - 20.0% | 8.0 - 12.0% | 2.0% | 0.75% | 0.045% |
| 316L (UNS S31603) | 0.03% | 16.0 - 18.0% | 10.0 - 14.0% | 2.0% | 0.75% | 0.045% |
| Duplex 2205 | 0.03% | 22.0 - 23.0% | 4.5 - 6.5% | 2.0% | 1.00% | 0.030% |
Choosing between 304 and 304L is critical for high-temperature welding applications. 304L has a lower carbon concentration to mitigate carbide precipitation at heat-affected zones during welding, improving intergranular corrosion resistance. For severe marine or subsea chemical processing, we recommend upgrading to molybdenum-alloyed 316L, Duplex 2205, or super austenitic alloys such as Incoloy 825 and Inconel 625.
Liaocheng Sihe processes a deep array of corrosion-resistant alloys conforming to national and international standards.
Operating six advanced continuous drawing production lines, Liaocheng Sihe integrates advanced automation to deliver long-length seamless coils, high-precision capillary tubing, and polished heat exchanger tubes.
We feature online hydrogen-nitrogen bright annealing technology to soften tube structures directly on the production line. This ensures a scaling-free, mirror-bright internal and external surface finish, optimizing mechanical elasticity and chemical resilience.
Our quality inspection pipeline encompasses compression, flaring, micro-bending, hardness checking, mechanical tensile evaluation, and 100% air-tightness/hydrostatic monitoring. There are no compromises when safety and deepwater operations are at stake.
Coiled tubing configurations are available in structural outer diameters ranging from 0.125 inch (3.175 mm) up to 1 inch (25.4 mm). Wall thickness can be specified up to 0.165 inch (3 mm) with spool lengths up to 32,800 feet (10,000 meters) to minimize mechanical field joints.
Custom metalworking and specialized fabrication options tailored to the physical demands of mechanical fluid systems.
Supports various materials (e.g., 304, 316L, 2205) and specifications (diameter 6.35mm to 19mm) for stainless steel coils.
Includes bending, spiral forming, precision drawing, and other processes tailored for heat exchangers.
Laser cutting, mechanical cutting, or flame cutting for high-precision and efficient material processing.
We devote ourselves to developing new products with state-of-art mechanical and chemical technologies.
Specifically configured for heavy industrial use in automotive exhaust systems, chemical pipelines, and high-pressure precision instrument connections.
Modern metallurgical engineering calls for cleaner chemical compositions with strict controls over tramp elements (sulfur, phosphorus). Liaocheng Sihe is shifting toward ultra-clean 304 matrices to minimize micro-cracks in sub-zero applications.
As offshore and subsea exploration pushes into ultra-deep waters, pipeline infrastructure demands corrosion resistance against chloride attack and high pressure stress.
We facilitate cross-border purchasing processes by offering comprehensive trade support, customized logistics handling, and international regulatory alignment.
We supply chemical and mechanical test certifications, Certificates of Analysis (COA), Certificates of Conformance (COC), and Country of Origin documents. All products comply with the raw material trace criteria specified under EN 10204 3.1.
Our packaging includes heavy-duty seaworthy wooden boxes, customized steel reels for coiled tubing, and protective plastic end caps. Specialized packing solutions are available to handle the physical demands of transoceanic transit.
Our products are exported to over 30 countries across the US, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe. We maintain close working partnerships with major freight carriers to optimize ocean transit lanes.
Our manufacturing operations align with strict quality verification and safety systems. Here is our certification display:
Essential insights regarding pricing, customization options, shipping schedules, and warranty policies.
High precision capillary tubes, duplex coiled products, and hot rolled plate systems. Direct factory quotation.
