Introduction and Application of Q345 Low Alloy Steel
Introduction and Application of Q345 Low Alloy Steel Q345 is a low-alloy steel widely used in Bridges, vehicles, ships, construction, pressure vessels, special equipment, etc. "Q" means yield strength and 345 means yield strength of this steel is 345MPa.Of the low alloy materials, Q345 is the most common. Q345 used to be called 16Mn. Q345 will reduce its yield value with the thickness of the material.In addition, the output of China may be less than 345, so the strength of mechanical design must be less than 345, otherwise there will be problems. Q345 is also divided into A, B, C, D and E grades.The difference of grade mainly lies in the difference of impact temperature. Q345A: no impact Q345B: impact at room temperature of 20℃ Q345C: 0℃ impact Q345D: impact at -20℃ Q345E: impact at -40℃ External standard of Q345: GB709, internal standard: GB/ t1591-2008 Due to the implementation of the standard, this steel plate allows negative tolerance delivery. Th...