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Steel is generally divided into four categories, profiles, plates, building materials, pipes. Among them, the materials of profiles and plates are mainly classified as Q235B, Q345B and Q355B, while the main material of building materials is HRB400E, and the material of pipes is also mainly Q235B. The types of profiles are H-shaped steel, I-beam steel, channel steel, Angle steel. Among them, the plates are medium and thick plates, pattern plates, pattern rolls and open plates.
Steel is generally divided into four categories, profiles, plates, building materials, pipes. Among them, the materials of profiles and plates are mainly classified as Q235B, Q345B and Q355B, while the main material of building materials is HRB400E, and the material of pipes is also mainly Q235B. The types of profiles are H-shaped steel, I-beam steel, channel steel, Angle steel. Among them, the plates are medium and thick plates, pattern plates, pattern rolls and open plates. The types of building materials are mainly seismic disk screw, three seismic rebar, four seismic rebar. The types of pipe mainly include black square pipe, black rectangular pipe, galvanized rectangular pipe, galvanized square pipe and so on.