What is the Q355B Q355C 355D?Q355B, Q355C and Q355D three grades of steel plates are all low-alloy high-strength structural steel, mainly should.
It is used in the manufacturing fields of bridges, buildings, vehicles, ships, etc. The main difference between them is the chemical composition, mechanical properties.
and small differences in process performance, etc. Q355B is a common low-alloy high-strength structural steel, and its chemical composition and mechanical properties are in line with national standards and regulations.
Decide. It has good comprehensive mechanical properties and welding properties, and is widely used in various engineering structures. Q355C is slightly modified on the basis of Q355B, and its chemical composition and mechanical properties are also in line with national standards.
Stipulate. Compared with Q355B, Q355C has improved performance in some aspects, such as low-temperature impact toughness and corrosion resistance.
etc. Therefore, Q355C has better applicability in some specific occasions. Q355D is the highest grade of steel plate in Q355 series, and its chemical composition and mechanical properties also meet the national standard regulations.
Decide. Compared with Q355B and Q355C, Q355D has higher requirements in terms of performance, such as higher tensile strength.
strength, yield strength and toughness, etc. Therefore, the Q355D has better applicability in some high-demand occasions, e.g.
Such as large bridges, high-rise buildings, etc. In short, the three grades of Q355B, Q355C and Q355D steel plates have their own characteristics and scope of use.
to select the appropriate steel plate grade according to the actual needs.