Carbon Steel Welded Tubes for Automotive Industry

Carbon steel ERW welded tubes are essential raw materials widely adopted in automobile manufacturing, balancing strength, cost efficiency and processability for passenger vehicles, commercial trucks and new energy vehicles.

High-frequency resistance welded (HFW) carbon tubes feature uniform wall thickness, smooth inner and outer surfaces, and stable dimensional accuracy. Multiple grades meet diverse load demands: low-carbon grades like Q235/ST37 for lightweight low-stress parts, while high-strength low-alloy grades Q355B (equivalent to ST52.4/E355) serve heavy-load structural components. Hot-dip galvanized coated tubes effectively resist corrosion for undercarriage parts exposed to mud and rain.

They cover key auto components thoroughly. In chassis systems, tubes form suspension brackets, frame supports and axle sleeves. Fluid delivery relies on welded tubes for air pipes, cooling pipelines and hydraulic lines. Roll bars, seat frames and cargo racks of commercial vehicles also adopt this material for reliable structural support.

Compared with seamless tubes, carbon welded tubes cut production costs greatly and suit mass automated production. Modern manufacturers strictly follow EN 10217, GB/T 3091 and ASTM standards to guarantee welding quality, impact resistance and pressure-bearing performance. With optimized forming and coating techniques, carbon welded tubes remain a cost-effective, mature solution supporting automotive lightweight and large-scale production.