Q345B | Q345C | Q345D | Q345E steel

GB/T1591 standard is applicable to high strength low alloy structural steel plates, steel strips, steel sections, steel bars, etc. for general structural and engineering purposes. GB/T1591 Q345A | Q345B | Q345C | Q345D | Q345E steel plates composition and mechanical properties are listed below. welcome to send your requirement to kingsteelpipe@gmail.com.

GB/T1591 Q345A Steel Composition and Mechanical Properties
C max
Si max.
Mn max
P max
S max
Nb max.
V max.
Ti max
Cr max
Ni max
Cu max
N max
Mo max
B max
Ala min
0.20
0.50
1.70
0.035
0.035
0.07
0.15
0.20
0.30
0.50
0.30
0.012
0.10
-
-
Yield Strength (MPa) min. (t≤16mm)
Yield Strength (MPa) min.(16mm<t≤25.4mm)
Tensile Strength (MPa)
Elongation % min.
345
335
470-630
20
GB/T1591 Q345B Steel Composition and Mechanical Properties
C max
Si max.
Mn max
P max
S max
Nb max.
V max.
Ti max
Cr max
Ni max
Cu max
N max
Mo max
B max
Ala min
0.20
0.50
1.70
0.035
0.035
0.07
0.15
0.20
0.30
0.50
0.30
0.012
0.10
-
-
Yield Strength (MPa) min. (t≤16mm)
Yield Strength (MPa) min.(16mm<t≤25.4mm)
Tensile Strength (MPa)
Elongation % min.
345
335
470-630
20
GB/T1591 Q345C Steel Plate Composition and Mechanical Properties
C max
Si max.
Mn max
P max
S max
Nb max.
V max.
Ti max
Cr max
Ni max
Cu max
N max
Mo max
B max
Ala min
0.20
0.50
1.70
0.030
0.030
0.07
0.15
0.20
0.30
0.50
0.30
0.012
0.10
-
0.015
Yield Strength (MPa) min. (t≤16mm)
Yield Strength (MPa) min.(16mm<t≤25.4mm)
Tensile Strength (MPa)
Elongation % min.
345
335
470-630
20
GB/T1591 Q345D Steel Composition and Mechanical Properties
C max
Si max.
Mn max
P max
S max
Nb max.
V max.
Ti max
Cr max
Ni max
Cu max
N max
Mo max
B max
Ala min
0.18
0.50
1.70
0.030
0.025
0.07
0.15
0.20
0.30
0.50
0.30
0.012
0.10
-
0.015
Yield Strength (MPa) min. (t≤16mm)
Yield Strength (MPa) min.(16mm<t≤25.4mm)
Tensile Strength (MPa)
Elongation % min.
345
335
470-630
21
GB/T1591 Q345E Steel Composition and Mechanical Properties
C max
Si max.
Mn max
P max
S max
Nb max.
V max.
Ti max
Cr max
Ni max
Cu max
N max
Mo max
B max
Ala min
0.18
0.50
1.70
0.025
0.020
0.07
0.15
0.20
0.30
0.50
0.30
0.012
0.10
-
0.015
Yield Strength (MPa) min. (t≤16mm)
Yield Strength (MPa) min.(16mm<t≤25.4mm)
Tensile Strength (MPa)
Elongation % min.
345
335
470-630
21

Our Steel Factory is specialized in producing and exporting GB/T1591 Q355B low alloy and high strength steel plate, heavy plates with large stock. If you have any requirement in steel plate for Q355E alloy, whether the new plate or stock list of material, please feel free to contact us by email of calling.
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