Q355 low alloy steel grade

Material: Q355B, Q355C, Q355D, Q355NE, Q355NF
Q355B equivalent to Q345B, S355JR steel.
Standard: GB/T1591-2018
Category: low alloy structural steel

Chemical composition(%) of Q355 hot rolled plate

Material
C max.
Si max.
Mn max.
P max.
S max.
Cr max.
Ni max.
Cu max.
N max.
Nb max.
V max.
Ti max.
Q355B
0.20
0.55
1.60
0.035
0.035
0.30
0.30
0.40
0.012
-
-
-
Q355C
0.20
0.55
1.60
0.030
0.030
0.30
0.30
0.40
0.012
0.05
0.13
0.05
Q355D
0.20
0.55
1.60
0.025
0.025
0.30
0.30
0.40
-
0.05
0.13
0.05

Mechanical properties of Q355 hot rolled plate

Grade
Yield strength MPa in different thickness mm
≤16
16-40
40-63
63-80
80-100
100-150
150-200
200-250
250-400
Q355B
≥355
≥345
≥335
≥325
≥315
≥295
≥285
≥275
-
Q355C
≥355
≥345
≥335
≥325
≥315
≥295
≥285
≥275
-
Q355D
≥355
≥345
≥335
≥325
≥315
≥295
≥285
≥275
≥265

Grade
Tensile strength MPa in different thickness mm
≤100
100-150
150-250
250-400
Q355B
470-630
450-600
450-600
-
Q355C
470-630
450-600
450-600
-
Q355D
470-630
450-600
450-600
450-600

We are specialized in exporting GB/T1591 Q355B low alloy and high strength steel plate. GB-T1591 Q355B steel sheet steel plate heavy plate, the company is a large steel plate supplier mill.
Done is better than perfect.

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