Q345R steel is Chinese material with wide application in petroleume, power station and boiler industries to make reactor, heat exchanger, separator, spherical tank, oil gas tank, nuclear reactor pressure shell, drum boiler, liquified petroleume gas cylinder and other equipments or accessories.
There are also such popular ASTM vessel steel with same role and performance of Q345R steel. It is A516 Grade 70 steel, and it is Q345R equivalent ASTM material.
Q345R steel and Q345R equivalent ASTM material A516 Grade 70 steel chemical composition:
| Grade | C | Si | Mn | P | S | Alt |
| A516 Grade 70 | ≦0.27 | 0.13-0.45 | 0.79-1.60 | ≦0.035 | ≦0.035 | |
| Q345R | ≦0.20 | ≦0.55 | 1.20-1.60 | ≦0.025 | ≦0.015 | ≧0.020 |
Q345R steel and Q345R equivalent ASTM material A516 Grade 70 steel mechanical properties:
| Grade | Yield Strength | Tensile Strength | Elongation |
| (Mpa) | (MPa) | (%) | |
| A516 Grade 70 | ≧260 | 485-620 | ≧17 |
| Q345R | ≧325 | 500-630 | ≧21 |
Though Q345R steel and Q345R equivalent ASTM material A516 Grade 70 steel play similar roles, we can find a lot of differences between their chemical composition and mechanical properties. So if you are not uncertain which material to choose, welcome to consult BBN steel, the professional Q345R steel and Q345R equivalent ASTM material A516 Grade 70 steel supplier.
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
