Petroleum steel pipe offers high pressure resistance, superior corrosion resistance and excellent weldability, designed for harsh oil and gas environments. Ideal for drilling, transmission pipelines, offshore platforms and refinery systems, these pipes can withstand extreme temperatures, acid/alkaline conditions and seismic stresses.

Petroleum steel pipe offers high pressure resistance, superior corrosion resistance and excellent weldability, designed for harsh oil and gas environments. Ideal for drilling, transmission pipelines, offshore platforms and refinery systems, these pipes can withstand extreme temperatures, acid/alkaline conditions and seismic stresses.

API 5CT N80 casing pipe covers N80-1 and N80Q types. N80-1 and N80Q steel have same chemical composition and mechanical attributes, and their difference lies in the heat treatment. N80-1 steel is normalized and tempered, while N80Q steel is quenched and tempered. So N80Q steel has higher collapsing strength and internal pressure strength than N80-1 steel. When API 5CT N80 casing pipe is selected, the designer should clearly show N80-1 or N80Q.

Carbon Steel Square Tube from Q235/SS400 steel (ASTM A500, EN 10219) with a yield strength of 235-355MPa, these square tubes offer high rigidity, easy welding and excellent load-bearing capacity - ideal for structural frameworks, machine bases and architectural designs. Available in hot-rolled or cold-formed options, they resist deformation and corrosion with galvanised or painted finishes, and thrive in harsh environments such as warehouses, coastal or industrial sites.Sizes, thicknesses and lengths can be customised for applications ranging from solar panel mounts and conveyor systems to outdoor furniture and scaffolding.

Low-Carbon Steel Square Tube：Lightweight, cost effective and built to last.
Made from Q195/Q235 steel (C≤0.20%, ASTM A500/EN 10219) with a yield strength of 235-355MPa, these square tubes are easy to weld, bend and cut for lightweight construction. With galvanised or painted finishes, they resist rust in mild environments and are ideal for shelving, furniture, agricultural equipment and solar panel mounts.

High Carbon Steel Square Tubes made from C60-C80 high carbon steel (ASTM A108, EN 10083) with 0.60-0.95% carbon content, these square tubes offer exceptional hardness (HRC 50-60), wear resistance and tensile strength (600-1200MPa), ideal for high stress, abrasive environments. Perfect for heavy machinery components (gears, shafts), automotive chassis, mining equipment and tooling frames, they can withstand extreme loads and impacts while maintaining structural integrity.