GB/T1591 Q345B hot rolled high strength low alloy structural steel plates are 'general purpose' manufacturing steel plates, used for sheet metal, light structural elements of household goods, and similar uses where it won't be used as a major structural component.
Q345B steel is a Chinese standardized low alloy, medium tensile strength steel made with a hot-rolling process, and is used for a number of manufacturing purposes.
GB/T1591 Q345B steel plates physical properties:
Annealing hardness: 235HBS
Cold pull hardness: 262HBS
Preheating temperature: 522°C
Quenching temperature:
- salt-bath furnace: 1191°C
- controlled atmosphere furnace: 1204°C
Holding time: 5~15 minutes
Temper temperature: 788 °C
After tempering hardness: >=60HRC
Melting temperature: 327.3 °C
Cooling type: air cooling
The Mill Test Certificate and Test Report for GBT1951 Q345B are as bellows：
GBT1951 Q345B steel chemical composition:
| Grade |
C %
|
Si %
|
Mn %
|
P %
|
S %
|
|
Q345B
|
≤0.20
|
≤0.55
|
1.00-1.60
|
≤0.040
|
≤0.040
|
The mechanical properties GBT1951 Q345B steel plate:
Grade |
Thickness
(mm)
|
Yield Strength (Mpa)
|
Tensile Strength
(MPa)
|
Elongation
(%)
|
Impact Energy
Min
|
|
Q345B
|
≤ 16
|
345
|
470-630
|
21
|
+20℃
|
34J
|
|
> 16-35
|
325
|
470-630
|
21
|
+20℃
|
34J
|
|
>35
|
295
|
470-630
|
21
|
+20℃
|
34J
|
|
The min impact energy is longitudinal energy
|
The specification of Q345B steel plates we bebon can offer:
Thickness:2mm-500mm
Width:1000mm-4200mm
Length:3000mm-18000mm
GB/T1591 Q345B steel plates heat treatment: As rolled/Control-rolled/Normalized
GB/T1591 Q345B steel plates delivery status: annealing, specific delivery status should be specified in the warranty book.
GB/T1591 Q345B steel plates before pretreating and pacaging we Bebon offered for our guests:
GB/T1591 Q345B steel plates Formability and Weldability:
The major benefit of this grade of steel is its mild temper. It's easy to form and easy to weld, allowing it to be used to put sheet plate on doors, steel cabinets and the exterior surfaces of most objects. Chances are, if you've got an object with a steel exterior that was made in China, this is the grade of steel used for the outside of it. It is the combination of comparatively low price and ease of use that makes this steel nearly ubiquitous in consumer goods where low weight isn't a major concern.
GB/T1591 Q345B steel plates equivalents:
DIN 17100 St52-3
EN 10025-2 S355JR
ASTM A572 A572Grade 50
Based on customer-oriented principle, we are always trying harder to supply GB/T1591 Q345B steel plates in accordance with customers’ requirements. If you need high qualified GB/T1591 Q345B steel plates, please contact us with our GB/T1591 Q345B steel plates sales team. Moreover, the equivalents steel plates, DIN 17100 St52-3steel plates, EN 10025-2 S355JR steel plates, ASTM A572 A572Grade 50 steel plates are also available for BEBON steel.
