Sihe Steel
Sihe Steel
Premium grade stainless steels, nickel-alloys, and carbon materials custom fabricated to meet strict ISO, ASTM, and EN industrial specifications.
In high-stress industrial applications, the mechanical characteristics of perforated metal sheets and custom tubings dictate structural longevity and fluid-flow efficiency. At Liaocheng Sihe Stainless Steel Material LTD, our engineering methodologies focus on maximizing the load-bearing integrity of components while optimizing geometric specifications.
Perforated and punched sheet metals are structural components that require calculation of open area percentages, pitch arrangements (60° staggered, 45° staggered, or straight line grid), and punch-to-die tolerances to prevent structural fracturing. Under extreme pressures—like those found in petrochemical reactors, cleanroom air diffusion panels, and heavy automotive exhaust baffles—selecting the correct metallurgical chemical makeup (such as Duplex 2205 or Austenitic 316L) is critical to avoiding localized corrosion cracking.
By controlling mechanical properties like yield strength, tensile limits, and grain orientation, our structural materials offer high durability even in sour gas processing plants and subsea environments.
Connecting global offshore, military, semiconductor, and heavy manufacturing demands with premium metallurgical solutions.
As global petrochemical exploration ventures into deepwater zones exceeding 3,000 meters, control lines and umbilical tubes must withstand extreme pressure differentials and hydrostatic loads. Our seamless coiled tubing is produced in lengths up to 32,800 feet (10,000 meters) to eliminate orbital joint failures.
Modern semiconductor lithography zones require highly controlled laminar airflows. Our precision-punched metal sheets serve as diffuser faceplates, ensuring non-turbulent air dispersion. Low outgassing, high-purity electro-polished profiles prevent particulate contamination.
Integrating Super Duplex 2507, Incoloy 825, and Inconel 625 into marine structures allows systems to resist chloride pitting. High-velocity saltwater exposure requires materials with low corrosion erosion rates, minimizing maintenance cycles in offshore equipment.
Liaocheng Sihe Stainless Steel Material LTD is a manufacturer specializing in high-performance stainless steel coiled tubes, polished tubes, seamless coiled tubing, super-long tubing, and advanced sheet metal solutions. With a production history spanning over a decade, we operate six highly automated production lines, delivering metallurgy to meet complex industrial demands.
We manufacture in strict compliance with global standards, including GB, ASTM, ASME, JIS, and EN. Our material catalog features premium grades: 304/304L, 316L, 321, 317L, 309S, 310S, INCOLOY 800, Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625.
Equipped with state-of-the-art online bright annealing technologies, we run continuous structural softening treatments to achieve precise mechanical dimensions. Our testing laboratory conducts non-destructive testing, including compression, flaring, bending, 100% hardness tests, tensile checks, and hydrostatic air-tightness verification, ensuring reliable field deployment.
Our engineering facility offers processing options tailored to match complex, project-specific drawings.
Supporting stainless steel coils from 6.35mm to 19mm outer diameters. Custom bending and geometric styling to optimize thermal transfer efficiency in heat exchanger shells.
High-speed laser cutting, abrasive water jet cuts, and clean mechanical shearing to maintain edge quality without micro-cracking, supported by custom end-flanging for connection sealing.
Controlled inert gas atmosphere bright annealing eliminates internal residual stresses, producing a scale-free, high-purity surface finish suited for semiconductor and pharmaceutical systems.
Our products perform under high pressures, temperature extremes, and aggressive corrosive conditions across diverse industries.
Our manufacturing processes are verified by international testing bodies, complying with EN, JIS, ASTM, ASME, and GB requirements.
Explore our core product ranges engineered for critical pressure, fluid containment, and filtration projects.
Duplex 2205 is an austenitic-ferritic stainless steel with high resistance to pitting, stress corrosion cracking, and general erosion.
Engineered for control line and gas delivery applications, offering reliable performance under high operating pressures.
High-temperature oxidation resistant grades designed to maintain strength and corrosion resistance in boilers and heat exchangers.
Reference tables outlining sizing tolerances, chemical designations, and limits for industrial applications.
| Alloy Class | Common Designation | UNS Identifier | Mechanical/Corrosion Features | Target Environments |
|---|---|---|---|---|
| Austenitic | SS 304/304L | S30400/S30403 | General corrosion resistance, high weldability and formability. | HVAC, structural components, food processing. |
| Austenitic | SS 316L | S31603 | Molybdenum addition resists chloride pitting and localized stress cracking. | Chemical processing plants, subsea installations. |
| Duplex | Duplex 2205 | S32205 | Mixed austenitic-ferritic structure, high yield strength. | Pressure vessels, subsea control line umbilicals. |
| Super Duplex | Duplex 2507 | S32750 | High concentration of Chromium and Molybdenum for sour gas resistance. | Deepwater oil exploration, offshore infrastructure. |
| Nickel Alloy | Incoloy 825 | N08825 | Titanium stabilized structure, resists oxidizing and reducing acids. | Sulfate and phosphoric acid systems, geothermal wells. |
| Nickel Alloy | Inconel 625 | N06625 | High fatigue strength, maintains properties at extreme operating temperatures. | Aerospace propulsion, petrochemical exhaust manifolds. |
Answers to technical, commercial, and operational questions for purchasing and engineering departments.
Pricing is calculated based on current LME metallurgical raw material rates, material grade choice (e.g., SS304 vs Inconel 625), gauge thickness, total dimensions, and production run size. For custom perforated sheets, die fabrication tooling costs and open-area ratios are also factored in. We provide a customized quote containing standard options once raw materials are selected.
Yes, to support regular manufacturing schedules, we require a minimum order volume for overseas shipments. The exact MOQ varies by material and processing requirements. For standard dimensions, smaller volumes can be evaluated based on raw material availability. Please contact us to discuss the requirements for your specific production run.
We provide material traceability reports, including EN 10204 Type 3.1 Mill Test Certificates (MTC), chemical composition breakdowns, mechanical property records, PMI (Positive Material Identification) results, hydrostatic/air tightness test records, ultrasonic inspection checks, and certificates of origin for customs clearance.
For prototype materials and standard stock profiles, preparation takes approximately 7 days. For custom production runs and volume requirements, standard timelines are 20 to 30 days following deposit verification and dimensional approval. These schedules may adjust based on specific material processing requirements, such as bright annealing or custom hole perforating patterns.
Our standard payment term is a 30% advance deposit via T/T bank transfer to initiate manufacturing, with the remaining 70% balance due upon presentation of the Bill of Lading (B/L) copy. Alternate secure payment instruments can be evaluated for established B2B accounts and state-sponsored procurement projects.
Our warranty covers physical defects, welding defects in control tubing, dimensional deviations outside specified standards, and chemical composition mismatches. In the event of a quality discrepancy, our technical team works to identify the root cause and provide appropriate resolutions, such as replacement material or structural repair.
High-alloy coiled tubing, precision capillary tubes, and heavy-duty structural steel pipes engineered for aggressive service environments.
