Steel Plates for Building Structure
Steel Plates for Building Structure
Main Application
Plates of Grade Q235GJ、 Q345GJ、 Q460GJ for building structure are made through advanced process, which are characterized by good comprehensive performance and excellent welding and processing performance, and are mainly used to build large construction project with complex force and high reliability, such as high-rise buildings, super high-rise buildings, large span stadiums, airports, convention and exhibition center, steel structure workshop, and power transmission towers.
Delivery Conditions
TMCP, hot rolled, and normalized ect.
Steel Grades
Category | Standard No. | Grade | Remarks |
Chinese standards |
GB/T19879-2005 | Q235GJB/C/D/E、Q345GJB/C/D/E、Q390GJ/C/D/E、 Q420GJ/C/D/E、Q460GJ/C/D/E、（Z15、Z25、Z35） | Steel plates for building structure |
Foreign standards |
JIS G3136 |
SN400A、SN400B/C、SN490B/C | Steel plates for building structure |
Chemical Composition Maximum (%)
Steel Grade | C | Si | Mn | P | S | Others | CEV | Pcm |
Q235GJB/C/D/E | 0.18 | 0.35 | 0.60～1.20 | 0.025/0.020 | 0.015 | Moderate | 0.36 | 0.26 |
Q345GJB/C/D/E | 0.18 | 0.55 | 1.60 | 0.025/0.020 | 0.015 | Moderate | 0.38 | 0.29 |
Q390GJC/D/E | 0.18 | 0.55 | 1.60 | 0.025/0.020 | 0.015 | Moderate | 0.40 | 0.29 |
Q420GJC/D/E | 0.18 | 0.55 | 1.60 | 0.025/0.020 | 0.015 | Moderate | 0.48 | 0.31 |
Q460GJC/D/E |
0.18 |
0.55 |
1.60 |
0.025/0.020 |
0.015 |
Moderate | Technical agreement | Technical agreement |
Mechanical Properties
Grade |
Yield Strength ReH, MPa |
Tensile Strength Rm, MPa |
Elongation A, % | Impact Absorbed Energy,Akv (Longitudinal) |
Yeild ratio Max. |
Bend 180° | |
Temp, ℃ | J | ||||||
Q235GJB/C/D/E | 235～355 | 400～510 | ≥23 | 20/0/-20/-40 | ≥34 | 0.80 | OK |
Q345GJB/C/D/E | 345～465 | 490～610 | ≥22 | 20/0/-20/-40 | ≥34 | 0.83 | OK |
Q390GJC/D/E | 390～510 | 490～650 | ≥20 | 0/-20/-40 | ≥34 | 0.85 | OK |
Q420GJC/D/E | 420～550 | 520～680 | ≥19 | 0/-20/-40 | ≥34 | 0.85 | OK |
Q460GJC/D/E | 460～600 | 550～720 | ≥17 | 0/-20/-40 | ≥34 | 0.85 | OK |
Typical Mechanical Properties
Grade |
Yield Strength ReH, MPa |
Tensile Strength Rm, MPa |
Elongation A, % | Impact Absorbed Energy,Akv (Longitudinal) |
Yeild ratio Max. |
Bend 180° | |
Temp, ℃ | J | ||||||
Q235GJB/C/D/E | 260～295 | 430～470 | 35 | 0 | ≥120 | 0.68 | OK |
Q345GJB/C/D/E | 360～400 | 510～560 | 30 | 20/0/-20/-40 | ≥120 | 0.70 | OK |
Q390GJC/D/E | 410～450 | 570～610 | 26 | 0/-20/-40 | ≥140 | 0.72 | OK |
Q420GJC/D/E | 440～480 | 600～650 | 24 | 0/-20/-40 | ≥140 | 0.74 | OK |
Q460GJC/D/E | 490～530 | 650～700 | 21 | 0/-20/-40 | ≥160 | 0.76 | OK |
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