Grade Q345NS GB/T 28907 is an alloy of iron and carbon and other elements. Due to its high tensile strength and low cost, it is the main component used in construction, infrastructure, tools, ships, automobiles, machines, and electrical appliances. The chemical composition in GB Q345NS GB/T 28907 determined by the analysis of the ladle should meet the specified values specified in the following table.
Q345NS steel chemical composition(% max., by mass)
C: 0.150, Si: 0.55, Sb: 0.15, S: 0.035, P: 0.0350, Mn: 1.50, Cu: 0.20, Cr: 0.30
The main mechanical properties of Q345NS steel include elasticity, plasticity, stiffness, aging sensitivity, strength, hardness, impact toughness, fatigue strength and fracture toughness.
Elasticity: Metal materials will deform when subjected to external forces. When the external force is removed, it can return to its original shape.
Plasticity: The ability of GB Q345NS GB/T 28907 to produce permanent deformation without damage caused by external forces.
Impact toughness: The ability of GB Q345NS GB/T 28907 to resist fracture under impact load.
Fatigue strength: Q345NS to the GB/T 28907 standard The maximum stress that does not cause fracture when subjected to repeated or alternating loads.
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