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Square steel: It is solid, a bar. Different from Square Tubes, it is hollow and belongs to pipes. 

Structural Steel Plate (mechanical engineering material): refers to steel that meets specific strength and formability grades. Formability is expressed as elongation after interruption of tensile test. Structural steel is generally used for bearing and other purposes, in which the strength of steel is a heavy design standard. Structural steel is a type of special steel.

I-beams, also known as steel beams, are long strips of steel with an I-shaped cross section.I-beams are divided into ordinary I-beams and light I-beams. It is a steel section with an I-shaped cross section.

Angle steel is a special steel material used to support and fix structures. Its cross section is L-shaped, so it is also called L-shaped angle steel.

Galvanized steel strip is a kind of metal product that is made by galvanizing the steel strip.

Steel truss floor deck is a prefabricated building formwork material used to support floors and bear loads.

Steel structures are made of steel plates, hot-rolled steel sections and cold-formed thin-walled steel sections.

On June 13, US President Trump formally approved Nippon Steel Corporation's acquisition of U.S. Steel Corporation for US$14.9 billion.

In May 2025, China's crude steel output was 86.55 million tons, a year-on-year decrease of 6.9%; pig iron output was 74.11 million tons, a year-on-year decrease of 3.3%; and steel output was 127.43 million tons, a year-on-year increase of 3.4%.

Spiral steel pipe is made of steel coil, extruded at room temperature, and then double-wire and double-sided submerged arc welding technology.