Import Astm Standard Carbon Steel Tube And Pipe — Buy in wholesale FOB from Supplier in China

ASTM-compliant carbon steel tubes and pipes from this supplier cover round, square, and rectangular hollow sections in grades Q195 through Q345, with additional options including ST37, ST52, A36, A53, SS400, S235, S275, C20, C45, and standard carbon steels 1006, 1008, 1010, and 1022. Outer diameters for round tube range 15 mm to 165 mm with wall thickness 0.8 mm to 2.5 mm, though the source also lists a broader 0.1-35 mm thickness range that appears to span multiple product categories. Square sections run 20 by 20 mm up to 500 by 500 mm with 0.6-25 mm wall; rectangular sections span 10 by 20 mm to 700 by 300 mm with the same wall range.

Production methods include both hot rolled and cold rolled forming, with surface treatments available as black finish, oiled, shot blasted, spray painted, coated, or galvanised per buyer request. The steel grades offered map to Chinese GB/T standards (Q195-Q345), American ASTM/ASME (A36, A53), German DIN (ST37, ST52), and European EN (S235, S275), giving buyers flexibility to match project specifications. Typical mechanical properties for Q235, the most commonly requested grade, include yield strength of 235 MPa minimum and tensile strength of 375-500 MPa, though buyers should request actual mill test certificates for the specific heat they receive.

These tubes serve construction framing, greenhouse structures, fence posts, curtain wall supports, machinery parts, and fluid transmission lines including pump wells, gas, and water distribution. The supplier indicates small batch delivery in 7-15 days depending on quantity, with larger orders requiring confirmation. Available trade terms include CIF, CFR, FOB, and EXW, with payment by T/T or L/C. End treatments include plain, bevelled, threaded, or socketed with PVC fittings. Packaging is in bundles with waterproof wrapping or crated per customer specification. Buyers in structural and mechanical applications should confirm dimensional tolerances, straightness, and any required third-party inspection before finalising orders.

Hongguan Steel Group Co. Ltd. operates from a supporting office area within the customs supervision warehouse of the Comprehensive Bonded Zone at 5999 Aerospace Avenue, High Tech Zone, Jinan, Shandong Province, China. The location in Jinan's bonded zone suggests the company handles export-oriented trade with potential customs facilitation, though the exact scope of in-house manufacturing versus trading is not clarified in the source. The trust tier is listed as harbour, with zero percent response rate and zero average response hours, indicating limited platform-verified engagement history.

The source does not state year of establishment, factory floor area, annual tonnage capacity, number of employees, or domestic versus export sales split. No quality management system certifications such as ISO 9001 or ISO 14001 are mentioned, nor are specific client references or project portfolios provided. Buyers should request a business licence, factory audit capability, and evidence of ASTM/GB standard compliance testing before committing to substantial orders. The broad product range and multiple steel grades suggest either significant production flexibility or trading relationships with multiple mills.