Sihe Steel
Sihe Steel
High-end industrial seamless coils, capillaries, and specialty duplex tubes manufactured at scale.
A comparative evaluation of PVD and Etched Stainless Steel Sheets within global industrial value chains.
By using Physical Vapor Deposition (PVD), titanium compounds are vaporized in a high-vacuum chamber to produce a thin, atomic-layer-thick coating on the substrate. This results in superior hardness and prevents peeling, fading, or micro-cracking compared to traditional chemical plating.
Etching creates detailed graphic patterns through controlled chemical acid dissolution. Combined with a protective PVD coating, it provides dual-layer defense against mechanical wear and salt mist exposure, making it ideal for coastal and high-traffic locations.
Integrating 201-grade and 304-grade stainless steel sheets offers optimized design flexibility. Grade 201 offers a cost-effective, high-yield strength solution for indoor decor, while Grade 304 provides premium resistance to pitting in outdoor applications.
Physical Vapor Deposition (PVD) utilizes an electric arc or sputtering target to ionize solid metal (e.g., Titanium or Zirconium) within a low-pressure chamber backfilled with reactive gases (Nitrogen, Acetylene, or Oxygen). This gas mixture forms thin-film transition metal nitrides, carbides, and oxides on the stainless steel surface. These films exhibit hardness levels exceeding 2000 HV (Vickers), providing superior scratch resistance and vibrant color consistency.
A detailed engineering comparison highlighting chemical composition, mechanical limits, and corrosion resistance.
| Alloy Element Group | Grade 201 (UNS S20100) | Grade 304 (UNS S30400) | Performance Significance |
|---|---|---|---|
| Chromium (Cr) | 16.0% - 18.0% | 18.0% - 20.0% | Determines self-healing passivation layers (Cr₂O₃) for corrosion resistance. |
| Nickel (Ni) | 3.5% - 5.5% | 8.0% - 10.5% | Stabilizes the ductile austenitic structure, improving formability and impact resistance. |
| Manganese (Mn) | 5.5% - 7.5% | ≤ 2.0% | Partially replaces nickel in Grade 201, increasing hardness and yield strength. |
| Nitrogen (N) | ≤ 0.25% | ≤ 0.10% | Improves interstitial hardening and enhances overall yield strength. |
| Pitting Resistance (PREN) | ~ 17-19 | ~ 18-21 | Indicates reliability under chloride attack and marine exposures. |
Due to its high manganese and nitrogen content, Grade 201 offers elevated tensile strength, making it ideal for structural elements, interior paneling, and high-foot-traffic areas. However, because it contains less nickel, it requires specialized topcoat treatments when exposed to high-humidity environments.
Grade 304 contains a minimum of 8% Nickel and 18% Chromium, giving it superior chemical stability. It is the global standard for harsh environments, exterior facades, pharmaceutical equipment, and sanitary applications where chemical resistance is critical.
A detailed look at the chemical etching and vacuum coating processes that ensure high surface quality.
Sheets undergo thorough multi-stage degreasing and ultrasonic cleaning to remove organic residues, ensuring optimal adhesion for subsequent coatings.
A UV-curable photoresist is applied to transfer intricate graphic designs from CAD files directly onto the steel surface via precision exposure units.
Ferric chloride solutions are sprayed in a temperature-controlled chamber to etch exposed areas, achieving consistent design depth and sharp details.
Alkaline cleaning baths remove the protective photoresist layer, exposing the contrasting etched and unetched stainless steel surfaces.
The etched sheet is loaded into a high-vacuum chamber. Sputtered metal ions (such as Ti, Zr, or Cr) are deposited to create long-lasting finishes in gold, bronze, black, or rose gold.
Automated spectrometers and tape-adhesion tests verify color consistency, coating thickness, and adhesion quality before packaging.
A premier manufacturer and global exporter of high-grade stainless steel tubes, coils, and decorative sheets.
Liaocheng Sihe Stainless Steel Material Ltd. operates six advanced production lines, specializing in stainless steel coiled tubing, high-precision polishing tubes, and seamless coiled piping. We process and test materials according to major global standards, including GB, ASTM, ASME, JIS, and EN.
Our material catalog features high-performance grades such as 304/304L, 316L, 321, 317L, 309S, 310S, and INCOLOY 800, along with advanced duplex steels like Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625.
Equipped with bright annealing technology, we perform online heat treatments to relieve residual stresses and improve ductility. Every production batch undergoes comprehensive testing, including hydro-pressure tests, flattening, flaring, micro-hardness checks, tensile tests, and eddy current examinations.
We process various materials (such as 304, 316L, and 2205) and offer tailored specifications ranging from 6.35 mm to 19 mm in diameter for stainless steel coils.
We provide bending, spiral forming, and precision drawing, designed specifically for heat exchanger integration.
We utilize laser, mechanical, and flame cutting technologies to meet precise length tolerances and edge requirements.
We develop high-quality surface finishes, including bright annealing, electro-polishing, mechanical polishing, and mirror treatments.
We produce flanged pipes and tubes for automotive exhaust systems, chemical pipelines, and precision instrument connections.
Our commitment to international quality and manufacturing standards.
How our high-performance alloys and custom-etched sheets are applied across industries.
Custom coiled tubing solutions engineered for subsea, aerospace, and high-pressure chemical transfer.
Manufactured using duplex 2205 containing balanced austenitic and ferritic microstructures for elevated resistance to stress corrosion cracking.
Precision-drawn 1/2-inch coiled tubing designed for high-pressure control lines, chemical injection, and subsea hydraulic systems.
High-temperature 310S grade tubing offering superior oxidation resistance for industrial ovens, kilns, and heat treatment systems.
Advancing surface engineering through green technology and automation.
We are transitioning to closed-loop chemical reclamation systems. This approach allows us to recycle ferric chloride solutions, significantly reducing heavy metal waste and alignment with international environmental regulations.
We are developing high-entropy alloy (HEA) coatings via PVD. These advanced coatings aim to offer superior wear and corrosion resistance compared to standard titanium nitride finishes.
By integrating real-time spectrophotometric monitors into our PVD chambers, we can automatically adjust gas flow rates to maintain consistent color across large manufacturing batches.
Expert technical answers regarding structural properties, order fulfillment, and application practices.
Explore our full line of ASTM, JIS, and DIN compliant stainless steel materials.
