Q345B Angle Steel

The Q345B angle steel is a type of low-alloy steel, compared to Q345A steel. It has a lower test temperature for low-temperature impact tests and better performance. The content of harmful elements P and S is lower than that of Q345A.

Q345B Angle Steel Meaning:

Q represents the yield of this material, 345 indicates the yield value of this material, around 345. It will decrease the yield value as the thickness of the material increases. Similar to the naming method of Q235.

Q345A, Q345B, Q345C, Q345D, Q345E—these denote different grades, with the primary distinction being the impact temperature. Q345A does not undergo impact testing; Q345B is tested at room temperature (20°C); Q345C is tested at 0°C; Q345D is tested at -20°C; and Q345E is tested at -40°C. The impact values also vary with the different impact temperatures.