Sihe Steel
Sihe Steel
Austenitic alloy optimized with high manganese-nitrogen balance for structural and trim stability in the Chubu industrial zone.
High-accuracy tolerance tubing tested rigorously under ASTM specifications for Aichi's hydraulic and instrumentation systems.
European-standard compliance profile designed with advanced bright annealing for structural integrity under mechanical loads.
Japanese Industrial Standard alignment offering cost-effective structural alternatives with high yield strength profile.
Nagoya, the capital of Aichi Prefecture, serves as the undisputed heart of Japan's manufacturing powerhouse. Home to massive aerospace clusters, automotive Tier-1 suppliers, and precision machinery makers, the local industrial hub demands raw materials that present the ideal balance of cost efficiency, structural strength, and corrosion resistance. In this environment, the 202 Stainless Steel Polishing Tube plays a crucial role.
Grade 202 is an austenitic chromium-manganese-nickel alloy developed to conserve nickel while delivering high yield strength. Enhanced with nitrogen additions, 202 offers excellent toughness at low temperatures and robust mechanical performance. When processed through precision mechanical polishing and bright annealing, these tubes are optimized for structural components, exhaust systems, and pneumatic cylinders where high-performance engineering meets budget-critical operations.
As a leading manufacturer, Liaocheng Sihe Stainless Steel Material LTD operates under strict compliance with global standards, including ASTM A269, ASME SA213, JIS G3459, and EN 10217-7. Our factory leverages six advanced production lines with integrated online bright annealing technologies to supply consistent metallographic properties.
| Property / Specification | JIS SUS202 (ASTM 202) Standard Values | Liaocheng Sihe Guaranteed Values | Test Methodology Applied |
|---|---|---|---|
| Chemical: Chromium (Cr) | 17.0% - 19.0% | 18.2% - 18.5% | Positive Material Identification (PMI) / Spectral |
| Chemical: Nickel (Ni) | 4.0% - 6.0% | 4.2% - 4.5% | Direct Coupled Plasma Optical Emission |
| Chemical: Manganese (Mn) | 7.5% - 10.0% | 8.1% - 8.5% | Spectrochemical Analysis |
| Yield Strength (Rp 0.2) | ≥ 260 MPa | 310 - 340 MPa | Tensile Testing machine (ASTM E8) |
| Surface Roughness (Ra) | No standard default | ≤ 0.4 μm (Grit 400 / 600 Polish) | Contact Profilometry / Mitutoyo Tester |
| Ovality Tolerance | ± 0.15 mm | ± 0.05 mm (Precision Drawn) | Laser Caliper Measurement |
Our commitment to reliability is demonstrated through our strict testing regimen. Every production batch of 202 stainless steel polishing tubes undergoes flattening, flaring, flanging, hardness (100% inspection), air tightness (underwater air pressure tests at 1.5 MPa), and ultrasonic flaw detection to ensure zero defects when integrated into Nagoya's critical assemblies.
The Chubu region is undergoing a massive shift toward green automation and electric vehicle (EV) supply chain restructuring. This requires a stable supply of alloy tubes that can endure structural loads without adding dead weight or inflating manufacturing budgets. Nagoya’s automotive Tier-1 companies and automated conveyor builders are turning to optimized 202 grade stainless tubes for:
Liaocheng Sihe is uniquely positioned to serve Nagoya's Just-In-Time (JIT) delivery systems, offering customs-compliant documentation, localized logistics routing to the Port of Nagoya, and mill certification alignment with Japanese JIS G3459 standards.
Modern global procurement requires more than off-the-shelf tubing. Our engineering team designs complete material solutions to address key structural challenges. We offer custom fabrication services that support direct integration into assembly lines, minimizing manufacturing overheads for our Japanese partners.
We process seamless and welded tubes into custom coils and multi-axis bends, ideal for compact oil-cooler units and automotive coolant routings.
Our online hydrogen-nitrogen bright annealing furnace eliminates scale and internal stresses, creating a clean finish that prevents fluid contamination.
Using laser-based roundness scanners and surface profilometers, we guarantee that every tube complies with specified dimensional and Ra values.
At Liaocheng Sihe, we focus on engineering materials that support long-term operations in challenging conditions. While 202 provides an efficient structural solution, our metallurgy pipeline covers complex environments requiring superior thermal or pitting resistance, including marine, chemical processing, and semiconductor manufacturing.
We actively formulate and draw high-alloy tubes, including Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625. These alloys are engineered for extreme deep-water extraction, aggressive chemical reactors, and high-temperature furnace piping.
Our focus on micro-structural design helps prevent grain growth during welding, reducing the risk of intergranular corrosion. This ensures that when Nagoya-based manufacturers upgrade to complex systems, our technical solutions are ready to meet their requirements.
We supply extensive verification dossiers to simplify validation in automated assembly lines:
High-grade finish, cold-drawn precision tubing meeting strict mechanical tolerances for industrial structural frameworks.
Designed under ASTM A269 criteria to ensure structural uniformity in high-precision control networks.
Aligned to European standard EN 1.4373, utilizing optimized manganese composition for enhanced load characteristics.
JIS SUS202 compliant, highly suited for manufacturing plants seeking high mechanical strength at low cost.
Universal grade 304 welded pipe, offering superb corrosion resilience and structural stability for fluid delivery.
Premium TP317 heat exchanger pipe optimized for severe elevated-temperature fluid loops in chemical plants.
High-grade 316 coiled tubing suitable for subsea, offshore oil exploration, and chemical transfer applications.
Precision-rolled 304 sheet for architectural casing, panel fabrication, and automotive structural components.
Navigating international supply chains requires reliable documentation and compliance auditing. Liaocheng Sihe ensures seamless alignment with the expectations of procurement and engineering divisions in Nagoya. Every export batch is fully trace-backed, and backed by a comprehensive QA package.
We work directly with major logistics partners to coordinate smooth transport. Whether shipping via full container load (FCL) or less than container load (LCL), our products are dispatched from Qingdao Port straight to the Port of Nagoya. We handle export clearances, provide Japanese Industrial Standard (JIS) certificate crossovers, and coordinate packaging parameters to prevent moisture-induced degradation during maritime transit.
Our facility holds recognized certifications to satisfy global QA expectations:
Our pricing is calculated based on current raw material costs (LME/ShFE indexes for Fe, Cr, and Mn) and custom processing specifications (surface roughness requirements, polishing grit, and wall thickness tolerance). Contact our sales office with your dimensions and quantities to receive an updated, custom quote.
Yes. To maintain production efficiency across our six lines, we require a minimum order quantity for international shipments. For standard sizes of 202 stainless steel polishing tubes, the MOQ typically ranges from 1 to 2 metric tons. However, for initial verification trials or smaller custom specifications, please speak with our sales representatives.
We provide comprehensive documentation packages, including Mill Test Certificates (MTC) conforming to EN 10204 3.1, raw material heat analysis sheets, Positive Material Identification (PMI) chemical reports, mechanical testing results (tensile, flattening, flaring, and hardness), and third-party inspection certifications (SGS, TUV, or Intertek) upon request.
For standard sample processing, production takes approximately 7 days. For mass production runs, the lead time is typically 20 to 30 days after receipt of the deposit payment and approval of technical drawings. Once shipped from Qingdao Port, ocean transit to the Port of Nagoya takes approximately 4 to 7 days, excluding customs processing times.
We accept standard corporate international payment terms: 30% T/T deposit in advance to initiate production, with the remaining 70% balance paid against copy of the Bill of Lading (B/L). We also accept Letter of Credit (L/C) arrangements for high-volume transactions.
Grade 202 contains higher levels of manganese and nitrogen, which lower nickel requirements while offering approximately double the yield strength of Grade 304. This makes 202 a cost-effective choice for structural, architectural, and moderate mechanical applications. However, 304 offers superior pitting corrosion resistance in highly acidic or maritime chloride-rich environments.
Bright annealing is performed in a controlled, oxygen-free hydrogen/nitrogen atmosphere. This prevents surface oxidation and preserves a clean, reflective finish without the need for acid pickling. As a result, BA tubes maintain a smooth surface that helps prevent particulate accumulation, making them suitable for pneumatic systems and sensitive fluid lines.
Yes. We manufacture standard outside diameters (OD) ranging from 0.125 inches (3.175 mm) up to 1 inch (25.4 mm), with custom wall thicknesses up to 3 mm. Lengths can also be customized, with continuous coiled tube options up to 10,000 meters to support efficient umbilical manufacturing.
Our engineers are ready to assist with material selections, custom tolerance requirements, and JIT delivery schedules. Contact us to receive engineering samples and a detailed quote.
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