The main materials of steel structures include carbon structural steel, low alloy high strength structural steel, high quality carbon structural steel and alloy structural steel. These materials are selected based on their physical and chemical properties to ensure the bearing capacity and durability of the structure. Carbon structural steels such as Q235 and Q345 are commonly used choices. The former has good plasticity and weldability, while the latter is suitable for structures subject to dynamic loads.
Characteristics and application scenarios of different materials
Carbon structural steel: such as Q235 and Q345. Q235 has moderate strength, good plasticity and weldability, and is suitable for civil engineering; Q345 is suitable for large spans and structures subject to dynamic loads.
Low alloy high strength structural steel: such as Q390, suitable for structures requiring higher strength.
High quality carbon structural steel: used in situations requiring higher strength and corrosion resistance.
Alloy structural steel: has higher strength and corrosion resistance, suitable for structures with special requirements.
Physical and chemical properties of materials
Strength: The strength of different materials ranges from 235 MPa for Q235 to 345 MPa for Q345, or even higher.
Toughness: Carbon structural steel has good toughness and is suitable for dynamic loads.
Corrosion resistance: Alloy steel and stainless steel have better corrosion resistance and are suitable for harsh environments.
Material processing and treatment methods
Steel structural materials are usually processed by hot rolling, cold rolling, forging and other methods. In order to enhance the corrosion resistance of the material and extend its service life, surface treatment processes such as galvanizing and aluminum zinc plating are often used.