Sihe Steel
Sihe Steel
Explore our leading industrial piping products engineered under strict global manufacturing standards
In the highly competitive global metallurgy sector, searching for cost-effective structural materials without sacrificing basic tensile strength and formability has become a paramount priority. Grade 202 stainless steel, categorized as a chromium-manganese-nickel (Cr-Mn-Ni) austenitic stainless steel, stands out as a highly reliable option. Initially developed to conserve nickel reserves during geopolitical crises, Grade 202 has established itself as an essential solution for applications requiring high yield strength, moderate corrosion resistance, and excellent formability.
As a leading Wholesale 202 Stainless Steel Pipe Factory, Liaocheng Sihe Stainless Steel Material LTD leverages state-of-the-art metallurgical technologies to manufacture custom-engineered piping systems. Grade 202 replacing standard 304 or 316 in specific environments allows procurement directors to achieve significant cost efficiency. With our online bright annealing technology, we control the microstructural alignment of Austenitic phases, minimizing chromium carbide precipitation and maximizing durability in structural and decorative industrial layouts.
| Steel Grade | Chromium (Cr)% | Manganese (Mn)% | Nickel (Ni)% | Nitrogen (N)% | Yield Strength (MPa) | Tensile Strength (MPa) | Optimal Environments |
|---|---|---|---|---|---|---|---|
| AISI 202 | 17.0 - 19.0 | 7.5 - 10.0 | 4.0 - 6.0 | 0.25 max | ≥ 275 | ≥ 515 | Mild atmospheric, decorative, mechanical structures |
| AISI 304 | 18.0 - 20.0 | 2.0 max | 8.0 - 10.5 | 0.10 max | ≥ 205 | ≥ 515 | Chemical processing, food production, clean utilities |
| AISI 316L | 16.0 - 18.0 | 2.0 max | 10.0 - 14.0 | 0.10 max | ≥ 170 | ≥ 485 | Marine, medical, acidic environments, offshore systems |
| Duplex 2205 | 22.0 - 23.0 | 2.0 max | 4.5 - 6.5 | 0.14 - 0.20 | ≥ 450 | ≥ 620 | High chloride pressure lines, offshore oil & gas |
*Note: Technical parameters listed comply with ASTM A240/A312 and GB standards. Mechanical values vary based on the extent of cold drawing reduction ratios and heat-treatment specifications.*
Global commodity markets are highly susceptible to fluctuations in raw Nickel pricing. Austenitic steels like 304 and 316 contain high concentrations of Nickel (exceeding 8% and 10% respectively), exposing procurement budgets to high market volatility. Grade 202, by substituting a substantial fraction of Nickel with Manganese and Nitrogen additions, acts as an excellent hedge against raw material price shocks.
Our global clients in structural manufacturing, construction, and consumer appliance fields rely on our factory quotes to plan annual supply chains. Manganese additions stabilize the face-centered cubic (FCC) austenite structure, while Nitrogen enhances mechanical properties, presenting higher yield strength than Grade 304. This allows designers to utilize thinner pipe walls in structural settings, decreasing weight and transportation costs while maintaining rigidity.
Six advanced production lines utilizing state-of-the-art metallurgy and in-line testing capabilities
A crucial challenge in processing stainless steel pipes is avoiding surface oxidation and carbide precipitation. At Liaocheng Sihe, we address this by integrating world-class bright annealing technology directly into our drawing lines. By performing heat treatments under a controlled pure hydrogen atmosphere, we prevent the formation of scale and surface oxides. This eliminates the need for acid pickling, ensuring the inner and outer diameters of our pipes retain a pristine, smooth reflective finish.
In addition, our state-of-the-art testing facility ensures compliance with international quality standards. Every batch undergoes mandatory quality checks to secure field safety in challenging settings:
Rigorous mechanical mapping confirms microstructural uniformity across all pipe segments.
Pipes are pressurized to verify weld seam integrity, followed by flaring tests to guarantee field workability.
Non-destructive testing filters internal defect anomalies, ensuring reliable performance under load.
As offshore exploration progresses into deeper, harsher marine environments, our mission is to support engineers in selecting corrosion-resistant materials for coiled umbilical tubing. We focus on enhancing structural integrity and operational safety, minimizing maintenance downtime. Liaocheng Sihe prioritizes client specifications to supply custom lengths up to 32,800 feet (10,000 meters) to support subsea operations.
Comprehensive value-added manufacturing options customized to meet your precise engineering requirements
We support various materials (e.g., 304, 316L, 202, 2205) and custom specifications, covering diameter configurations from 6.35mm up to 19mm for seamless and welded coils.
Includes high-precision bending, spiral forming, mechanical drawing, and thermal optimization tailored specifically for demanding heat exchanger designs.
We provide advanced CNC laser cutting, physical mechanical sawing, and automated straightening processes for projects requiring high-precision tolerances.
We deliver specialized surface treatment techniques. Our processes range from mechanical mirror polishing to pickling, achieving surface roughness (Ra) values within strict design requirements.
Our flanging services produce secure connections across automotive exhaust components, chemical piping manifolds, and high-precision analytical equipment.
Supplying high-performance stainless steel materials to support critical industries worldwide
Our pipes maintain thermal conductivity and resist scaling under high pressure, making them suitable for industrial heat exchangers.
Designed for durability and leak resistance in continuous HVAC condenser and cooling setups.
Provides corrosion protection against mild acids and chemicals, ensuring chemical processing safety.
Smooth inner surfaces help maintain hygienic standards in food preparation and transport systems.
Passivated surfaces reduce contamination risks, supporting high-purity pharmaceutical piping networks.
Engineered to handle steam and fluid handling operations in high-stress power environments.
Maintains mechanical structural strength in harsh petroleum refining conditions.
High strength-to-weight ratios make these pipes suitable for high-vibration structural installations.
Liaocheng Sihe products are manufactured in compliance with international testing standards (ISO, CE, and SGS)
The manufacturing process of stainless steel piping is shifting towards carbon neutrality and high-precision alloy modifications. In our facility, we are researching and developing structural pathways to improve the intergranular corrosion properties of Grade 202. By keeping Carbon content below 0.08% and adding balanced micro-alloys of Titanium or Niobium, we aim to stabilize carbide precipitation during welding processes.
In addition, our technical team is working to optimize the cold-drawing reduction sequence. By utilizing automated control loops, we monitor drawing speed and mechanical friction, allowing us to maintain a dimensional outer diameter tolerance within +/- 0.05mm. This degree of control supports direct field installation in analytical equipment, semiconductor pipelines, and complex subsea umbilical installations.
Direct answers regarding specifications, ordering processes, logistics, and quality assurance
Discover our range of durable stainless steel heat exchanger tubes, precision capillary tubing, and plates
