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Q345E is a kind of steel. Is a low alloy steel, widely used in Bridges, vehicles, ships, buildings, pressure vessels, special equipment, etc., where "Q" means yield strength, 345 means the yield strength of this steel is 345MPa.
Q345A, Q345B, Q345C, Q345D, Q345E. This is the grade of the division, on behalf of the main impact of the temperature is different!
Q345A class, is not to do impact; Class Q345B, 20 degrees room temperature impact; Class Q345C, 0 degree impact; Class Q345D, -20 degree impact; Q345E, it's a -40 degree shock. At different impact temperatures, the impact value is also different. In the plate, is a low alloy series. In the low alloy material, this material is *** ordinary. In the past, Q345 was called 16Mn.
The external implementation standard of Q345 is GB709, and the internal implementation standard is GB/T1591-2008
Due to the implementation of the standard, such steel plates are allowed to be delivered with negative tolerance.
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