Q345B steel is the most common used as high strength low alloy structural steel in industry area. The equivalent steel grade with Q345B are EN 10025-2 S355JR, ASTM A572 Grade 50 and DIN 17100 St52-3.
Q345B Adopt standard: GB-T1591 Standard Specification is for Rolled Steels for Welded Structure
Q345B Specification: Thickness: 3mm to 250mm; Width: 1220mm to 4200mm: Length: 5000mm to 18000mm
Q345B Chemical compositionMax % of the Product analysis of grade
|
C
|
Si
|
Mn
|
P
|
S
|
Nb
|
V
|
Ti
|
|
0.20
|
0.50
|
1.70
|
0.035
|
0.035
|
0.07
|
0.15
|
0.20
|
|
Cr
|
Ni
|
Cu
|
N
|
Mo
|
B
|
Als min
|
|
|
0.30
|
0.50
|
0.30
|
0.012
|
0.10
|
-
|
-
|
|
Q345B Steel Yield strength:
|
Nominal thickness (mm)
|
To 16
|
16-40
|
40-63
|
63-80
|
80-
100
|
100-
150
|
150-
200
|
200-
250
|
250-
400
|
|
ReH - Minimum yield strength (MPa)
|
345
|
335
|
325
|
315
|
305
|
285
|
275
|
265
|
-
|
Q345B Steel Tensile Strength:
|
Nominal thickness (mm)
|
To 40
|
40-63
|
63-80
|
80-100
|
100-150
|
150-250
|
250-400
|
|
ReH - Minimum yield strength (MPa)
|
470-630
|
470-630
|
470-630
|
470-630
|
450-600
|
450-600
|
-
|
Q345B Steel Impact Test degree and energy:
|
|
Min Energy Nominal thickness
|
|
Temperature ℃
|
20
|
|
Thickness (mm)
|
12-150
|
150-250
|
250-400
|
|
Notch impact test. Min. absorbed energy
|
34
|
27
|
-
|
Equivalent grades of grade Q345B
Q345B Delivery Time Or Lead Time: 15-30days
Q345B Extra Service:Pretreatment (Shot Blasting, Sand Blast, Painting and Galvanized), Cutting Parts, Sample Service, Third Party inspection, UT Test and Size inspection.
Third Party Inspection for Q345B: ABS, DNV, BV, GL, CCS, LR, RINA, KR, NK, CE, SGS, IKE, IEI or other quality department.
If you have any requirement in steel plate for Q345B, whether the new plate or stock list of material, please feel free to contact us by email of calling.
