Stainless steel square bars are square-section bars made from stainless steel and belong to the steel material category. The main materials include 200 series (chromium-nickel-manganese austenitic), 300 series (chromium-nickel-austenitic), and 400 series (ferritic/martensitic) stainless steels. Among them, grades such as 304 and 316L achieve corrosion resistance, high temperature resistance, and high strength through low-carbon design (e.g., the suffix "L") or alloy composition adjustments. The density of 304 stainless steel is 7.93 g/cm³, equivalent to that of Chinese 0Cr19Ni9 stainless steel.

Stainless steel flat steel can be composed of various stress components according to the different needs of the structure, and can also be used as a connector between components. Widely used in various building structures and engineering structures, such as beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouse shelves, etc.

Carbon steel round bars, also known as plain round bars or round steel, are solid round bars made from carbon structural steel and high-quality carbon steel through processes such as hot rolling, cold drawing, precision drawing, and quenching and tempering. The surface finish is available in three forms: hot-rolled black skin, cold-drawn bright surface, and precision-ground mirror finish. The product materials cover ordinary carbon steel, high-quality carbon steel, and low-alloy structural steel. It boasts stable mechanical properties, excellent machinability, weldability, and forging performance, making it a fundamental and universal raw material for machining, hardware accessories, steel structures, fasteners, and mold auxiliary materials.

201 stainless steel bars belong to manganese-substituted nickel austenitic stainless steel, and are also commonly referred to as 201 stainless steel round bars. They are available in hot-rolled, cold-drawn, bright round, and precision-ground varieties, with a solid circular cross-section.

Carbon steel square bars, also known as square steel, are solid square-section carbon steel profiles. They are mainly manufactured using processes such as hot rolling, cold drawing, precision drawing, and precision grinding, and are available in three main surface types: hot-rolled black square bars, cold-drawn bright square bars, and precision-ground square bars. The products are manufactured using carbon structural steel, high-quality carbon steel, and low-alloy steel, resulting in regular cross-sections, excellent straightness, and stable dimensional tolerances. They also possess excellent cutting, welding, bending, forging, and heat treatment properties, making them a core raw material for machining, mold manufacturing, steel structures, hardware accessories, and equipment frames.

304 stainless steel bars are the most widely used general-purpose austenitic stainless steel round bars. They have a solid circular cross-section and are mainly divided into four categories: hot-rolled round bars, cold-drawn round bars, bright round bars, and precision-ground round bars.

Carbon steel rectangular bars, also commonly known as rectangular steel, are solid rectangular cross-section carbon steel profiles produced through hot rolling, cold drawing, precision drawing, and precision grinding processes. They are mainly available in three surface finishes: hot-rolled black, cold-drawn bright, and precision ground. The products feature a flat cross-section, precise length and width dimensions, excellent straightness, and good cutting, welding, bending, stamping, and heat treatment properties. They are a common basic raw material for machining, steel structures, molds, hardware accessories, curtain wall supports, and grounding components.

Seamless carbon steel square tubes (commonly known as "carbon steel seamless square tubes") refer to hollow square cross-section steel tubes made of carbon steel (such as 20#, Q235B, Q345B, etc.) with no weld seams around the perimeter. They are formed by hot rolling, cold drawing or extrusion into seamless round tubes, combining the economy of carbon steel with the high strength and high reliability of seamless structures.

Galvanized C-shaped steel is a lightweight load-bearing structural steel made from cold-rolled or hot-rolled steel sheets such as Q235 through cold bending and roll forming, with a "C"-shaped cross section. The surface is hot-dip galvanized (zinc layer is usually 120–275g/㎡), and it has the characteristics of high strength, lightweight and corrosion resistance. It is widely used in purlins, wall beams, supports and mechanical components of steel structure buildings.