Q345FR series steel is a fire-resistant steel plate for building structures. Q345FRB Q345FRC Q345FRD Refractory structural steel can be used in the construction of office buildings, shopping malls, hotels, factories, stadiums, stations, high-rise steel structure buildings.
Q345FRB Q345FRC Q345FRD steel chemical composition (%, melting analysis)
Grades |
C |
Si |
Mn |
P |
S |
Mo |
Nb |
Cr |
V |
Ti |
Al |
|
Max. |
Min. |
||||||||||
|
Q345FRB |
0.2 |
0.55 |
1.6 |
0.025 |
0.015 |
0.9 |
0.1 |
0.75 |
0.15 |
0.05 |
0.015 |
|
Q345FRC |
0.2 |
0.55 |
1.6 |
0.025 |
0.015 |
0.9 |
0.1 |
0.75 |
0.15 |
0.05 |
0.015 |
|
Q345FRD |
0.18 |
0.55 |
1.6 |
0.02 |
0.015 |
0.9 |
0.1 |
0.75 |
0.15 |
0.05 |
0.015 |
|
Q345FRE |
0.18 |
0.55 |
1.6 |
0.02 |
0.015 |
0.9 |
0.1 |
0.75 |
0.15 |
0.05 |
0.015 |
Mechanical properties of Q345FRC steel
Grades |
Tensile test |
V-shaped impact test |
||||||
|
Yield strength MPa, in thickness mm |
Tensile strength, MPa |
Elongation, % |
Flex-strength ratio |
Test temperature ℃ |
Absorb energy J |
|||
|
≤16 |
16-63 |
63-100 |
||||||
|
Q345FRB |
≥345 |
345-465 |
335-455 |
≥490 |
≥22 |
≤0.83 |
20 |
≥34 |
|
Q345FRC |
≥345 |
345-465 |
335-455 |
≥490 |
≥22 |
≤0.83 |
0 |
|
|
Q345FRD |
≥345 |
345-465 |
335-455 |
≥490 |
≥22 |
≤0.83 |
-20 |
|
|
Q345FRE |
≥345 |
345-465 |
335-455 |
≥490 |
≥22 |
≤0.83 |
-40 |
|
Q345FRC steel sheet delivery status is hot rolling, controlled rolling, normalizing, normalizing rolling, thermomechanical rolling (TMCP), TMCP+T (tempering). As a leading refractory structural steel supplier in China, we can supply Q345FRB Q345FRC Q345FRD steel plates with high quality.
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!
