Sihe Steel
Sihe Steel
Direct factory supply of certified continuous-length corrosion resistant alloys tailored for Scandinavian process environments.
904L is a highly alloyed, low-carbon austenitic stainless steel specifically designed to withstand extreme corrosive environments. By incorporating significant amounts of nickel (24% to 26%) and chromium (19% to 23%), along with targeted additions of molybdenum (4% to 5%) and copper (1% to 2%), 904L offers excellent resistance to non-oxidizing acids, such as sulfuric and phosphoric acids.
In Denmark's marine-adjacent chemical industries, standard 316L stainless steel often suffers from severe localized pitting, crevice corrosion, and chloride-induced stress corrosion cracking (SCC). 904L's low carbon content minimizes carbide precipitation during thermal operations, maintaining its corrosion resistance along weld joints and heat-affected zones.
Coiled tubing forms of 904L eliminate the need for mechanical fittings or orbital butt welds over long spans, drastically reducing potential failure points in hydraulic control systems, downhole instrument lines, and subsea umbilicals.
| Element / Spec | Min % | Max % |
|---|---|---|
| Chromium (Cr) | 19.00 | 23.00 |
| Nickel (Ni) | 24.00 | 26.00 |
| Molybdenum (Mo) | 4.50 | 5.00 |
| Copper (Cu) | 1.00 | 2.00 |
| Yield Strength | ≥ 220 MPa | |
| Tensile Strength | 490 - 690 MPa | |
Analyzing the demand for premium corrosion-resistant materials across Denmark's primary industrial sectors.
As Denmark expands its offshore energy hubs in the North Sea, the conversion of wind power to green hydrogen (Power-to-X) requires tubing that can withstand constant marine exposure and hydrogen embrittlement. 904L coils provide reliable piping for electrolysis units and seaside installations.
Denmark's world-leading pharmaceutical cluster (centered around the Medicon Valley region) uses high-purity tubing for bulk active ingredient processing. Bright-annealed 904L coils resist corrosive cleaning agents and high-temperature sanitization cycles.
Shipbuilders and ship repair hubs in Esbjerg, Odense, and Frederikshavn require highly durable exhaust gas scrubbers and seawater cooling systems. Using 904L coiled lines minimizes system failures and extends the operational life of maritime components.
Liaocheng Sihe Stainless Steel Material LTD operates 6 advanced production lines, providing high-precision seamless coiled tubing engineered for strict global standards.
We utilize advanced bright annealing processing line technology to treat our coils, ensuring a clean, reflective surface finish that prevents build-up and corrosion. Our manufacturing tolerances adhere to ASTM A213, ASTM A249, ASTM A269, and EN standards.
To meet the requirements of Danish engineers, all 904L coiled lines undergo rigorous non-destructive and physical tests before delivery:
Our facilities combine computerized control processes with strict quality standards, backed by international quality system certifications.
We offer value-added engineering and local logistics support for Danish and global engineering groups.
We support targeted bending configurations, spiral coils, and custom coil dimensions tailored for marine condensers and space-constrained process plants.
For control panels and structural manifolds, we provide pre-straightened lengths cut with laser or mechanical precision systems.
Every hydraulic control line is pressurized to strict engineering design limits to ensure pressure integrity before shipment.
Inner and outer diameter cleaning processes reduce micro-roughness, meeting strict requirements for pharmaceutical process applications.
Pre-installed end fittings reduce assembly time for control manifolds, downhole tools, and high-pressure chemical dosing lines.
Reinforced custom wooden boxes, metal reels, or plastic spools keep continuous tubes safe from marine moisture and damage during transport.
Engineered for extreme performance across demanding marine, subsea, and process industries.
Explore our full line of coiled tubing alloys, standard instrumentation tubes, and high-temperature steels available for delivery across Denmark.
Get professional answers about technical specifications, ordering requirements, and delivery logistics for 904L stainless steel coiled tubing.
