Sihe Steel
Sihe Steel
Precision engineered to meet strict JIS and ASTM standards. Optimally balanced for Japan's high-performance automotive and industrial manufacturing sectors.
High formability and structural integrity, tailored for automotive exhaust fabrication.
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ASTM certified high-strength structural piping designed for severe mechanical stress.
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A312 specification compliant for high-temperature and general corrosive services.
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Precision-engineered according to JIS standards, perfectly serving Japanese engineering guidelines.
View DetailsGrade 202 stainless steel is a Cr-Mn-Ni-N austenitic alloy, characterized by low nickel content paired with manganese and nitrogen additions. Historically classified under the 200-series family, 202 serves as a highly efficient, high-performance alternative to Grade 304 in non-marine, moderately corrosive environments. The integration of nitrogen significantly increases the yield strength of the alloy (typically around 275 MPa, compared to 304's 205 MPa), providing Japanese structural engineers with opportunities for gauge-reduction and weight savings without compromising mechanical performance.
In Japan, where high precision and material efficiency are paramount, Grade 202 is increasingly specified for automotive exhaust systems, decorative structural piping, and HVAC components. By utilizing manganese as a partial substitute for volatile nickel, 202 provides a stable and predictable price curve, shielding Japanese procurers from the supply shocks typical of LME (London Metal Exchange) nickel fluctuations.
Japanese industrial manufacturing demand is governed by strict compliance parameters, including the Japanese Industrial Standards (JIS). The structural and automobile engineering sectors frequently mandate compliance with JIS G3446 (Stainless steel pipes for machine and structural purposes) and JIS G3448 (Light gauge stainless steel tubes for ordinary piping).
Liaocheng Sihe Stainless Steel Material Ltd designs and calibrates its automated forming and high-frequency induction welding lines to strictly align with these JIS tolerance frameworks. With tolerance controls down to ±0.05mm on wall thickness and outer diameter, our pipes seamlessly integrate into robotic welding cells operated by Tier-1 automotive component suppliers in Aichi, Hiroshima, and Shizuoka prefectures.
A Chinese Manufacturing Powerhouse Supplying Precision Austenitic, Duplex, and Nickel Alloys Globally.
Liaocheng Sihe Stainless Steel Material LTD is a leading expert and premier manufacturer based in China, boasting six state-of-the-art production lines. We specialize in the high-precision development of stainless steel coiled tubing, polishing tubes, and seamless coiled tubing. Our operations are governed by strict production protocols compliant with international standards including GB, ASTM, ASME, JIS, and EN.
Our material portfolio spans a wide spectrum of high-performance alloys, including austenitic grades (304/304L, 316L, 321, 317L, 309S, 310S, INCOLOY 800, Incoloy 825, Inconel 625) and advanced duplex grades (Duplex 2205, Super Duplex 2507). Our engineering depth allows us to customize tubing size structures ranging from 0.125 inches (3.175mm) to 1 inch (25.4mm) in outer diameter, with wall thicknesses up to 0.165 inches (3.0mm) and ultra-long continuous spools reaching up to 32,800 feet (10,000 meters).
As offshore gas and oil extractions migrate into harsher marine environments, we work closely with EPC contractors to deliver corrosion-resistant umbilical tubing that enhances operational reliability. To support high-end applications, we utilize world-class bright annealing technologies that execute online heat treatment under protective atmosphere conditions.
By integrating regional steel mills, raw material costs are managed dynamically. Combined with high-throughput continuous forming systems, our 202 welded pipe pricelist delivers significant cost advantages over standard domestic Japanese manufacturers, maintaining a stable price foundation despite nickel market volatility.
Every single batch of 202 welded pipe undergoes online non-destructive eddy current testing, flaring, hydraulic, and flattening checks. This prevents the shipment of sub-standard joints and guarantees that the weld seam zone possesses equal tensile strength compared to the base material.
With proximity to major Chinese shipping ports (Qingdao, Tianjin, and Shanghai), we provide quick maritime routes to key Japanese industrial hubs like Tokyo, Yokohama, Nagoya, and Osaka. Standard lead times for mass production are held between 20 to 30 days.
Where grade 202 and high-performance alloys are applied for optimal balance between cost and functional reliability.
Liaocheng Sihe is not just a tube drawing factory; we provide specialized processing services to match your exact configuration requirements.
We support custom processing configurations for various materials (e.g., 304, 316L, 2205) and specifications (diameters ranging from 6.35mm to 19.05mm) for coiled stainless steel tubing lines.
Includes precision bending, specialized spiral forming, cold drawing, and dimensional calibrating tailored for high-efficiency heat exchangers and complex HVAC routing layouts.
Leveraging industrial-grade laser cutting and mechanical automatic straightening stations, we minimize geometric deviations to avoid downstream robotic handling problems.
Our bright annealing, electrochemical polishing, and chemical passivation options ensure highly reflective surfaces, lower friction coefficients, and enhanced localized corrosion protection.
Custom flared ends, swaged connections, and precision flange attachments optimized for secure fitment in automotive exhaust systems and industrial lines.
Talk directly to our metallurgical engineers to discuss chemical limits, mechanical constraints, and specialized delivery formats.
Contact EngineersExtended inventory of precision tubing, seamless coils, and connective adapters.
High mechanical strength and stress corrosion cracking protection in aggressive marine services.
Universal sizing for industrial control lines, pneumatic controls, and liquid transfer systems.
High-temperature service tubing resistant to oxidation and carburization up to 1100°C.
Precision cold-drawn continuous coil tube for chemical and instrumentation setups.
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Grade 310S (S31008) alloy coils optimized for high-temperature heater systems.
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Polished decorative and machine structural piping compliant with SUS201 standard guidelines.
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Precision-machined fittings designed for reliable, high-pressure tubing interconnections.
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We manufacture a wide range of custom specifications upon request.
Contact UsEvery length of tube leaving our mills is traceable and certified under international quality management systems.
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Explore our complete range of high-performance piping, capillary tubing, and specialized alloys.
High-frequency welded SUS202 tubing engineered for automotive mufflers and tailpipes.
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Cost-effective structural welded piping with optimized formability profiles.
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Ferritic chromium-based piping providing excellent stress-corrosion resistance.
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JIS standard-compliant 201 alloy pipeline designed for general engineering purposes.
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Titanium-stabilized ferritic steel designed to handle demanding exhaust heat environments.
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Super duplex precision capillary tubing optimized for chemical injection lines.
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High-precision, close-tolerance industrial structural tubing configurations.
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ASTM A269 compliant austenitic capillary tubing for hydraulic and instrumentation lines.
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