Chemical properties of Q390B alloy steel plate
Q390B high strength low alloy steel is a low alloy high strength structural steel. "Q" stands for yield strength, "390" means the yield strength is 390MPa, and "B" stands for quality grade.
Q390B low alloy steel implementation standard: produced in accordance with national standards such as GB/T 1591. Q390B is suitable for a variety of welding technologies and is easy to process and manufacture.
Q390B low alloy steel material can be used in construction, machinery, transportation, shipbuilding and other fields, such as high-rise buildings, bridges, engineering machinery, shipbuilding, etc.
| Grade | C % | Si % | Mn | P % | S % | |
| Q390B | ≤ 0.20 | ≤ 0.55 | 1.00-1.60 | ≤ 0.045 | ≤ 0.045 | |
| Grade | Thickness | Yield Strength (Mpa) | Tensile Strength | Elongation | Impact Energy | |
| (mm) | (MPa) | (%) | Min | |||
| Q390B | ≤16 | 390 | 490-650 | 19 | 20 | 34 |
| >16-35 | 370 | 490-650 | 19 | 20 | 34 | |
| >35 | 350 | 490-650 | 19 | 20 | 34 | |
| The min impact energy is longitudinal energy | ||||||
