Q345B steel Mechanical Properties:
Steel tensile strength is expressed in units of force divided by cross sectional area; in the Metric system, this unit is known as the Pascal. One Pascal is a Newton (the force needed to accelerate a one kilogram object to a velocity of one meter per second) per square meter. The tensile strength of Q345B steel is rated at 470 to 630 Mega Pascal (where mega is million) and a yield strength (where the material starts to thin and pull like taffy) at 345 Mega Pascal. Like most steels of its grade, it suffers elongation before it pulls apart, typically at 20-21 percent of its initial length.
GB/T1591 Q345B Carbon Structural Steel Plate, GB/T1591 Q345B High Strength Structural Steel Plate, GB/T1591 Q345B Carbon Steel plate, GB/T1591 Q345B Structural Steel Plate.
Main chemical elements composition of Q345B:
| C | Si | Mn | P | S | V | Nb | Ti |
| 0.20 | 0.55 | 1.00-1.60 | 0.040 | 0.040 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 |
Q345B Steel Mechanical Property:
| Thickness (mm) | ||||
| Q345B | ≤ 16 | > 16 ≤ 35 | > 35 ≤ 50 | >50 |
| Yield strength (≥Mpa) | 345 | 325 | 295 | 275 |
| Tensile strength (Mpa) | 470-630 | |||
Main Application:
GB/T1591 Q345B Steel Plate are used in Construction of Bridges, Highway Construction and Other Engineering construction.

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Address: Zhengzhou city in China.


