Q345b Q355b S355jr Low Alloy Steel Channel for Heavy Structural Engineering

Q345b Q355b S355jr Low Alloy Steel Channel for Heavy Structural Engineering. Three interchangeable material grades, match global domestic and European engineering standards perfectly. High low-alloy strength, far superior bearing capacity to ordinary Q235 carbon channe. B grade/JR grade guaranteed room temperature impact toughness, safe for outdoor & temperate cold regions. Integral hot rolled forming eliminates internal stress, stable mechanical performance for long-term heavy load. Parallel straight flange design simplifies bolt connection, drastically cut on-site assembly labor cost. Excellent comprehensive fabrication performance, support diversified secondary deep processing. Complete full-size specification system, minimize construction site material waste. Multiple surface treatment options adapt to complex indoor and harsh outdoor environments. Strict dimensional tolerance control, seamless docking with various standard section steels. Complete standard test certificates and standardized seaworthy export packaging for global shipment.