Sihe Steel
Sihe Steel
Engineered to strict international standards including ASTM, JIS, and DIN. Discover our high-performance welded pipes directly sourced from Liaocheng Sihe.
An in-depth metallurgical analysis of Grade 201 Stainless Steel, production advantages in China, and macro-industrial solutions for procurement teams worldwide.
Grade 201 stainless steel is an austenitic chromium-nickel-manganese alloy developed originally to conserve nickel. By substituting manganese and nitrogen for a portion of the nickel content, 201 stainless steel delivers robust mechanical properties combined with excellent formability at a significantly lower, more stable cost point than traditional Grade 304.
Our 201 welded pipes are highly favored in dynamic load scenarios such as automotive exhaust systems. The addition of nitrogen increases the yield strength by approximately 30% compared to Grade 304, allowing for thinner-walled designs without compromising structural integrity. This makes it an ideal option for engineers looking for cost-efficiency without sacrificing strength under high stress.
Liaocheng Sihe Stainless Steel Material LTD operates six highly automated production lines, integrating state-of-the-art Bright Annealing (BA) processes online. Online BA treatment allows the stainless steel pipe to undergo inline recrystallization and softening in a controlled hydrogen-nitrogen gas atmosphere, preventing oxidation and maintaining a reflective, highly polished surface without requiring mechanical pickling.
Our infrastructure delivers massive cost-efficiency. Being based in China's industrial steel hub allows us to secure raw materials directly from primary mills, ensuring chemical composition stability. All products undergo rigorous on-site quality assurance, including flaring, flattening, bending, hardness (100% verification), tension, and pneumatic/hydrostatic testing. We export approximately 80% of our products globally, offering rapid delivery lead times and flexible custom design services.
| Grade | Carbon (C) Max | Manganese (Mn) | Nickel (Ni) | Chromium (Cr) | Nitrogen (N) Max | Yield Strength (Mpa) | Tensile Strength (Mpa) |
|---|---|---|---|---|---|---|---|
| 201 Austenitic | 0.15% | 5.50% - 7.50% | 3.50% - 5.50% | 16.0% - 18.0% | 0.25% | ≥ 310 | ≥ 640 |
| 304 Austenitic | 0.08% | 2.00% Max | 8.00% - 10.50% | 18.0% - 20.0% | 0.10% | ≥ 205 | ≥ 515 |
| 316L Low-Carbon | 0.03% | 2.00% Max | 10.00% - 14.00% | 16.0% - 18.0% | 0.10% | ≥ 170 | ≥ 485 |
While Grade 201 has lower corrosion resistance compared to high-nickel alloys like 316L in acidic marine environments, it is the absolute champion for structural, decorative, and mild-exposure environments. In local markets, it is heavily used for automotive structural parts, HVAC system support frames, and heavy commercial vehicle exhaust systems where structural vibration is high but exposure to high chlorides is minimal.
Additionally, our welded pipes are designed for optimized performance in exhaust manifolds and tailpipes, offering thermal fatigue resistance and maintaining shape under elevated temperatures. For municipal and decorative applications—such as handrails, indoor architectural tubing, and public transportation safety rails—the high yield strength of 201 ensures reliable impact resistance at a fraction of the cost of other austenitic grades.
For international procurement directors, navigating global supply chains requires reliable partners who understand strict engineering codes and import regulations. Liaocheng Sihe supports multi-standard compliance (GB, ASTM, ASME, JIS, EN) and can provide complete material documentation including Certificates of Analysis (COA), Mill Test Certificates (MTC) conforming to EN 10204 3.1, and comprehensive logistics insurance.
We work to optimize your Total Cost of Ownership (TCO). Our customized quotation model factors in current steel alloy market trends, raw material spot pricing, and shipping routes to provide predictable, fixed pricing models for large-scale construction, automotive, and industrial manufacturing operations. Contact our engineering team for customized wall thicknesses, outer diameters, and lengths up to 10,000 meters for coiled tubes.
A world-class manufacturer specializing in high-performance stainless steel coiled tubing, polishing tubes, and seamless industrial pipes.
Liaocheng sihe stainless steel material LTD is a leading expert in the manufacturing and development of premium-grade stainless steel products. We strictly conform to global standards including GB, ASTM, ASME, JIS, and EN. Our core steel portfolio includes high-performance alloys designed for demanding operational environments: 304/304L, 316L, 321, 317L, 309S, 310S, INCOLOY 800, Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625.
Our manufacturing plant features advanced processing technologies including online bright annealing, ensuring consistent grain structure and zero surface oxidation. Our products are widely utilized in military applications, semiconductors, pharmaceutical biotechnology, precision instrumentation, hydraulic control lines, marine oil and gas exploration, chemical heat exchangers, and automotive exhaust systems.
We specialize in manufacturing extremely long continuous lengths of coiled tubing, ranging from outer diameters of 0.125 inch (3.175 mm) to 1 inch (25.4 mm), with wall thicknesses up to 0.165 inch (3 mm), and continuous spool lengths up to 32,800 feet (10,000 meters) without orbital welds. This is critical for umbilical line manufacturers operating in deep-water environments.
Custom engineering solutions engineered to deliver long-term reliability and chemical resistance across heavy industrial applications.
We support various materials (e.g. 304, 316L, 2205) and custom specifications (diameters 6.35mm to 19mm) for stainless steel coiled tubing.
Precision bending, spiral forming, high-speed drawing, and surface polishing processes designed specifically for heat exchangers.
Automated fiber laser cutting, precision mechanical cutting, and cold straightening methods for high-accuracy length control.
Continuous research and development in chemical pickling, mechanical mirror polishing, and electrochemical treatment.
Specially developed flanged connections for quick integration in automotive exhaust manifolds and petrochemical pipelines.
Get professional answers about pricing structures, material certifications, delivery procedures, and specifications.
Specialty stainless steel products designed for petrochemical, precision hydraulic, and heat exchanger systems.
