Authentic Steel manufactures and supplies structural commercial carbon steel coils conforming to global standards including GB/T 700 Q235B, JIS G3101 SS400, and ASTM A36. Produced via high-temperature hot continuous rolling of continuous casting steel slabs, these commercial-grade carbon steel coils deliver a proven balance of tensile strength, elongation ductility, and cost-effective structural performance.
Commercial carbon steel coils are the cornerstone material for heavy manufacturing, civil engineering, and secondary steel processing. Characterized by low carbon equivalence, excellent flame cutting capability, and clean thermal workability, Q235B/SS400 coils are engineered for high-efficiency electric arc welding, high-load cold bending, and heavy structural framing without pre-heating requirements.
Primary Steel Grade Designations: GB/T 700 Q235B (Q235A, Q235C, Q235D); JIS G3101 SS400; ASTM A36 / A283 Grade C; EN 10025-2 S235JR / S235J2
Thickness Dimension Capabilities: 0.8 mm to 19 mm (Heavy hot rolling mill thickness range)
Coil Width Availability: 1000 mm, 1219 mm, 1250 mm, 1500 mm, 1800 mm, 2000 mm, or custom slitted heavy strips
Surface Delivery Status: As-Rolled Hot Surface (Mill Scale Finish), Pickled & Oiled (PO Finish), or Shot-Blasted
Carbon Equivalence Ratio (CEV): Low carbon chemistry Carbon ensuring high weldability
Applicable International Standards: GB/T 700, JIS G3101, ASTM A36 / A36M, EN 10025-2, ISO 630
Welded Steel Pipes & Structural Tubing: Slitted into strips and high-frequency welded (ERW/LSAW/SSAW) into structural water pipes, piling tubes, scaffolding frames, and hollow structural sections (HSS).
Civil Engineering & Bridge Framing: Formed into heavy structural beams, bridge girder plates, foundation trench box walls, and building column anchor plates.
Heavy Machinery & Vehicle Chassis: Utilized in excavator frames, dump truck bed chassis, crane booms, agricultural machinery brackets, and shipping container floors.
Shipbuilding & Pressure Plate Substrates: Applied in non-critical ship hull plating, storage tank shells, chemical vessel jackets, and industrial silvers.
Excellent Weldability & Machinability: Low carbon content allows continuous manual, MIG, TIG, and submerged arc welding without cracking, thermal distortion, or post-weld heat treatment.
Tight Thickness Uniformity Across Wide Strips: Utilizing advanced automatic gauge control (AGC) hydraulic systems, our hot mills maintain stable thickness and flat crown profiles from coil head to tail.
Heavy-Duty Export Packaging: Bound with high-tensile steel straps, waterproof inner wrapping, steel edge guards, and anti-rust coating for safe oceanic transit on breakbulk vessels or open-top containers.
