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GB/T1591 Q345B low alloy structural steel

GB/T1591 Q345B low alloy structural steel

GB/T1591 Q345B low alloy structural steel Steel Standard:GB/T1591 Rolling Type:High strength low alloy structural steels Thickness:2mm-500mm Width:1000mm-4200mm Length:3000mm-18000mm Heat Treatment:As rolled/Control-rolled/Normalised Steel grade Q345B is the most common us

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GB/T1591 Q345B low alloy structural steel

Steel Standard:GB/T1591
Rolling Type:High strength low alloy structural steels
Thickness:2mm-500mm
Width:1000mm-4200mm
Length:3000mm-18000mm
Heat Treatment:As rolled/Control-rolled/Normalised
Steel grade Q345B is the most common used as high strength low alloy structural steel in industry area.BBN steel can offer steel coils,steel plates,angles,channels for Q345B materials.The equivalent steel grade with Q345B are EN 10025-2 S355JR,ASTM A572/A572 A572 Grade 50 and DIN 17100 St52-3.
Full Data
Technical Requirements & Additional Services:
♦ Low temperature impacting test
♦ Cutting and welding as per end user's demands
♦ More striction on some chemical elements contains
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Ultrasonic test under GB/T2970,JB4730,EN 10160,ASTM A435,A577,A578
Mechnical property for GB/T1591 Q345B low alloy structural steel:

Thickness (mm)
Q345B ≤ 16 > 16 ≤ 35 > 35 ≤ 50 >50
Yield strength (≥Mpa) 345 325 295 275
Tensile strength (Mpa) 470-630

Chemical composition for GB/T1591 Q345B low alloy structural steel (Heat Analysis Max%)

Main chemical elements composition of Q345B
C Si Mn P S V Nb Ti
0.20 0.55 1.00-1.60 0.040 0.040 0.02-0.15 0.015-0.060 0.02-0.20

Q345 steel specification: Q345 steel belongs to 16Mn steel grade, usually it is produced in hot rolled state, hot rolled steel plate, hot rolled steel coil/sheet, it has comprehensive mechanical and welding property, as it shows good performance in structural purposes, it is widely used as welding structural part in manufacturing of ship, railway and vehicles, bridges, boiler, pressure vessel container, steel oil tank, etc. Yield point of Q345 steel plate decreases as plate thickness increases.
Q345 steel properties: welding property of Q345 steel is occasionally questioned by end users, although welding property is mainly affected by its chemical content, its production technology has been improved after all those years of research, and has been proved to be one excellent steel standard for steel structure purposes, you can contact us if there's any doubt in your mind.
Application difference Q345 - Q235:
As Q345 and Q235 alloy element content is different, their applications are quite different.
Q235 carbon structural steel is made for metal construction that doesn't have high demand for steel strength, tie rod, connecting rod, hook, coupler, bolt and nut, sleeve, shaft and welding parts.
Q345 is low alloy structural steel with good mechanical properties, low temperature performance, plasticity and good weldability, it is mostly used in low pressure vessel, oil tank, vehicles, cranes, mining machinery, power stations, mechanical parts, building structure, general metal parts, Q345(E) steel plate is always delivered in hot rolled or normalizing state, can be used in areas where its temperature is above -40.
℃.

Client demands
 

Customer's requirement configuration.

1. demand

Custom design
 

Field inspection design and design plan.

2. design

Processing & transportation

Initial customized processing and transportation.

3. Processing

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On-site guidance for construction and installation.

4. installation
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