Main application areas?
Construction (beams, columns, trusses), bridges, ships, pressure vessels, cranes, mining machinery, vehicle manufacturing.
Common steel grades for building structures?
Q345B/C (normal temperature/generally low temperature).
Steel grades for bridges?
Q345D/E (fatigue resistant, low temperature resistant).
Steel for pressure vessels?
Special 16MnDR (low temperature vessels), ordinary Q345 is irreplaceable.
How to select steel for low temperature environments?
0℃: Q345C
-20℃: Q345D
-40℃: Q345E.