International Equivalent Steel Standards Table
Q355 steel is a new Chinese steel grade of Low Alloy High Strength Structural Steel, which replaced Q345, the material density is 7.85 g/cm³. According to GB/T 1591-2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D. “Q” is the first letter of Chinese Pinyin: “qu fu dian”, which means Yield Strength, “355” is short for 355 MP a, parameters are tested with 16mm diameter steel bars or steel plates, and tensile strength is 470-630 Mp a. Q355B steel is mostly used for our steel structure buildings.
Q355 Features and Applications
Q355 steel is a high-strength, low-alloy structural steel widely used in prefabricated steel structure buildings, particularly in load-bearing and enclosure structures. In steel structure buildings, Q355 steel plate is typically used for critical components such as I/H steel beams, columns, and trusses, offering excellent stability, seismic resistance, and the ability to withstand vertical and horizontal loads.
Moreover, Q355 steel is extensively applied in industrial steel structure buildings and steel structure factories, as well as in stadiums, warehouses, and multi-Story buildings, serving as crane beams and support structures to handle heavy equipment loads. In high-rise steel structure buildings, Q355 steel is frequently used in steel frames, core tubes, and braces to meet the requirements for high strength and resistance to wind and seismic forces. Additionally, in prefabricated steel structure buildings, the processability and standardization of Q355 steel significantly improve construction efficiency.
Q355 Steel Chemical Composition (Hot rolled)
Carbon Equivalent (CEV)
Based on smelting analysis, steel delivered in hot rolled state
Q355 Mechanical Properties (Hot rolled)
Q355 Steel Elongation
Q355 Steel Equivalents (Reference)
