Sihe Steel
Sihe Steel
Explore our industrial-grade coiled, capillary, and heat exchanger pipes manufactured under strict ASTM, JIS, and EN compliance metrics.
In contemporary heavy industries—ranging from subsea oil and gas exploration to high-efficiency thermodynamic power units—material resilience is not merely a preference; it is a critical regulatory and safety mandate. Global supply chains face severe challenges in sourcing stamped stainless steel plates and seamless coiled tubing capable of enduring cyclic fatigue, thermal deformation, and aggressive chemical degradation.
As a leading domestic specialist, Liaocheng Sihe Stainless Steel Material Ltd designs and manufactures integrated metallurgical systems. By utilizing advanced stamping profiles, high-precision dimensional tolerances, and controlled grain structure optimization, we bridge the technical gap between traditional alloy limits and the extreme operating parameters of modern infrastructure.
The selecting of appropriate grades determines the lifecycle costs and environmental limits of your installation. Stamping and forming stainless steel require high yield strengths, excellent elongation properties, and stable pitting resistance indices (PREN). Below is a comprehensive breakdown of the core alloys manufactured and customized at our facilities:
| Alloy Grade | UNS Designation | Standard Compliance | Key Chemical Components | Primary Application Environment |
|---|---|---|---|---|
| Austenitic 304/304L | S30400 / S30403 | ASTM A240 / A269 | 18% Cr, 8% Ni | General-purpose chemical processing, food-grade sanitary systems, household applications. |
| Austenitic 316L | S31603 | ASTM A240 / A269 | 16-18% Cr, 10-14% Ni, 2-3% Mo | Marine environments, pharmaceutical fabrication, acid handling, and offshore processing. |
| Duplex 2205 | S31803 / S32205 | ASTM A240 / A789 | 22% Cr, 5% Ni, 3% Mo, 0.18% N | High-strength structural tubing, severe chloride environments, heat exchangers, downhole umbilicals. |
| Super Duplex 2507 | S32750 | ASTM A240 / A789 | 25% Cr, 7% Ni, 4% Mo, 0.28% N | Ultra-corrosive chemical lines, desalination systems, subsea manifolds, high pressure fluid control. |
| Incoloy 825 | N08825 | ASTM B163 / B423 | 38-46% Ni, 19-23.5% Cr, 2.5-3.5% Cu | Sour gas production, sulfuric & phosphoric acid storage, offshore oil extraction pipelines. |
| Inconel 625 | N06625 | ASTM B444 / B704 | Min 58% Ni, 20-23% Cr, 8-10% Mo, 3.15-4.15% Nb | Aerospace manifolds, engine exhausts, high-temperature heat exchangers, nuclear waste control. |
To supply precise components matching complex engineering layouts, Liaocheng Sihe incorporates high-precision secondary metal forming technologies. We do not just ship raw sheets and tubes; we provide custom fabrications that integrate directly with your industrial processes.
Our stainless steel coils, stamped sheets, and precision fittings are deployed globally across demanding chemical, HVAC, thermal, and aerospace infrastructure projects.
Operating across highly volatile global zones—such as deepwater offshore zones in the North Sea or refinery centers in North America—requires meticulous tracking of metal chemistry. Liaocheng Sihe operates in compliance with international design parameters: GB (China), ASTM (USA), ASME (USA), JIS (Japan), and EN (Europe).
Every product batch is issued with verified Certificates of Analysis (CoA) and Certificates of Conformance (CoC), documenting mechanical limits, pressure test results, heat-treatment histories, and dimensional accuracy checks down to micrometric scales. Our QA systems ensure zero surface contamination, consistent grain structure, and high dimensional stability under high-stress conditions.
How Liaocheng Sihe is adapting to modern energy transitions and evolving technical paradigms.
Developing ultra-low carbon steel variants designed to eliminate hydrogen embrittlement in hydrogen fuel lines and gas storage reservoirs.
Engineering sub-millimeter capillary tubes with ultra-thin walls to support precision chromatography and aerospace fuel metering systems.
Integrating energy-recovery loops into our bright annealing systems to reduce furnace carbon footprints by up to 25% over the next decade.
Our core focus is the processing of steel materials designed for mechanical stability and high corrosion resistance. Our specialized catalogue is structured into five core industrial classes:
Flexible Seamless Coil
Stainless Steel Tubing
310 Steel Coil Tube
Addressing engineering specifications, global logistics, localized regulatory compliance, and general procurement practices.
Examine our full manufacturing capability list for custom projects, industrial maintenance, and high-performance equipment upgrades.
