GB/T1591 Grade Q345A, Q345B, Q345C, Q345D, Q345E Alloy Steel

GB/T1591 standard: Grade Q345A, Q345B, Q345C, Q345D, and Q345E alloy steel are 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. If you want to purchase Grade Q345A, Q345B alloy steel, Q345C plates from China supplier, pls send RFQ to klsteelamber@outlook.com.

GB/T1591 Grade 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 Grade 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 Grade Q345C 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	0.030	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 Grade 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 Grade 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

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