Q345C Galvanized Square Pipe

Compared to Q345A and B steel, Q345C steel has a lower impact test temperature at low temperatures and better performance. It contains less harmful elements P and S than Q345A and B. The market price is higher than that of Q345A and B.

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

Q345A, Q345B, Q345C, Q345D, Q345E—these denote different grades, primarily distinguished by varying impact temperatures. Q345A does not require impact testing; Q345B is tested at 20°C; Q345C is tested at 0°C; Q345D is tested at -20°C; Q345E is tested at -40°C. The impact values also differ at these various temperatures.