Carbon steel hexagonal bars, also known as hexagonal steel, are solid carbon steel profiles with a regular hexagonal cross-section. They are primarily produced using cold-drawing, hot-rolling, and precision grinding processes, and come in three surface finishes: hot-rolled black, cold-drawn bright, and precision ground high-precision. The products are uniformly symmetrical on all six sides, have high dimensional accuracy, and good coaxiality. They also possess excellent cutting, milling, bending, welding, and heat treatment properties, making them a core raw material for manufacturing bolts, nuts, shaft ends, fasteners, mechanical parts, and hardware tools. Their assembly and positioning performance is far superior to that of round or square steel.

Welded carbon steel pipes are steel pipes made from carbon steel (such as Q235, 20#, 45#, etc.). The steel plates or strips are rolled into shape and then welded using processes such as high-frequency welding, submerged arc welding, and electric arc welding to form longitudinal or spiral welds. They are a type of welded steel pipe, and their material is essentially carbon steel.

Hot-rolled carbon steel sheet is made from carbon steel (C ≤ 0.60%) with a predominantly carbon content, produced through heating, rough/finish rolling, and cooling at 1100–1250℃. It has an oxide scale on the surface and lower dimensional accuracy, but good plasticity, high toughness, and low cost. It is commonly used in structural components, vehicle frames, bridges, and other load-bearing applications where surface finish requirements are not high.

Weathering carbon steel plate (commonly known as weathering steel plate or atmospheric corrosion resistant steel) is a low-alloy high-strength steel made by adding small amounts of alloying elements such as copper, phosphorus, chromium, and nickel (generally less than 5%) to ordinary carbon steel. Its core characteristic is the ability to form a dense and stable rust protective layer on its surface in natural environments ("rust prevention with rust"), significantly improving its atmospheric corrosion resistance (approximately 2-8 times that of ordinary carbon steel), and allowing for long-term exposed use without painting.

Welded square tubes are used in construction, machinery manufacturing, steel construction projects, shipbuilding, solar power generation brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, boiler construction, highway railings, housing construction etc.

Wear-resistant carbon steel plates typically refer to special steel plates made of high-carbon or medium-high-carbon steel as the base material, which are heat-treated (such as quenching and tempering) or alloy-strengthened to possess high hardness and resistance to abrasive wear.

Q345 carbon steel bars are low-alloy high-strength structural steel bars, conforming to the GB/T 1591-2008 standard (the new national standard has been upgraded to Q355, but Q345 remains the mainstream grade in the market). "Q" represents yield strength, and 345 indicates a minimum yield strength of 345MPa for thicknesses ≤16mm, significantly higher than that of ordinary Q235 carbon steel. The products include four main cross-sections: round bars, square bars, flat bars, and hexagonal bars, manufactured using hot rolling, cold drawing, and precision grinding processes, and available in three surface finishes: hot-rolled black, cold-drawn bright, and precision ground.

Welded square tubes are used in construction, machinery manufacturing, steel construction projects, shipbuilding, solar power generation brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, boiler construction, highway railings, housing construction etc.

Thick-walled seamless carbon steel pipe is a steel pipe with no weld seam and relatively large wall thickness, made from carbon steel (such as 10#, 20#, 35#, 45#, etc.) through processes such as hot rolling, cold drawing or hot expansion. It is usually defined as a seamless pipe with an outer diameter to wall thickness ratio of less than 20.