Q345 Steel Yield Strength

Q345 steel is one kind of Chinese standardized low alloy steel under GB/T1591-2018 standard. "Q" in Q345 material means yield strength, and 345 indicates that the yield strength of this steel is 345MPa. Q345 steel plates and sheets aer widely used in bridges, vehicles, ships, constructions, pressure vessels, special equipment, etc.
Q345 can be divided into Q345A, Q345B, Q345C, Q345D, Q345E according to the quality grade. They represent mainly different temperatures of impact.
If you want to purchase Q345B, Q345C steel, pls send RFQ to klsteelamber@outlook.com.

Q345 steel yield strength

The yield strength or yield point is the material property defined as the stress at which a material begins to deform plastically. Prior to the yield point the material will deform elastically and will return to its original shape when the applied stress is removed. Yield strength of Q345B is 345 Mega Pascals. Like most steels of its grade, it suffers elongation before it pulls apart, typically at 20-21 percent of its initial length.
The tensile strength of Q345 steel is the maximum amount of tensile stress that it can take before failure, for example breaking. Steel tensile strength is expressed in units of force divided by cross sectional area; in the Metric system, this unit is known as the Pascal. One Pascal is a Newton  per square meter. The tensile strength of Q345 steel is rated at 470 to 660 Mega Pascals.

Q235 Quality Steel Vs Q345 Quality Steel

The lower limit of the yield strength of Q235 is 235 MPa, and the lower limit of the yield strength of Q345 is 345 MPa (Q means the Chinese character "yield", the latter value represents the lower limit of yield strength) 2. The alloy content of the two is different: Q235 is ordinary carbon steel, Q345 For low alloy steel

Q235 is a carbon structural steel, compared with the old standard GB700-79 grades A3, C3

Q345 is a low-alloy structural steel, compared with the old standard 1591-88 12MnV, 16Mn 16MnRE, 18Nb, 14MnNb