In grade Q345C, Q is the symbol for yield strength, 345 means Q345C steel can bear a minimum yield strength of 345MPa. Moreover, GB/T1591 Q345C steel is a kind of Carbon and Low-alloy High-strength Steel, and GB/T1591 Q345C Steel Plates find their broad application areas in Construction of Bridges, Highway Construction and Other Engineering construction.
Q345C low-alloy high-strength steel plates can be delivered in either normalized or Thermo mechanically rolled condition, Q345C low-alloy high-strength steel plates benefits to high strength structures, on the other hand weight saving in the final structure due to plate thickness can be reduced, thus increased effective loads during use as well as cost saving in fabrication.
The Mill Test Certificate and Test Report for GBT1951 Q345C are as bellows：
Q345C low-alloy high-strength steel plates physical properties
Annealing hardness: 235HBS
Cold pull hardness: 262HBS
Preheating temperature: 522°C
Quenching temperature:
1. salt-bath furnace: 1191°C
2. controlled atmosphere furnace: 1204°C
Holding time: 5~15 minutes
Cooling type: air cooling
Temper temperature: 788 °C
After tempering hardness: >=60HRC
Melting temperature: 327.3 °C
Q345C low-alloy high-strength steel plates chemical composition:
| Grade |
C %
|
Si %
|
Mn %
|
P %
|
S %
|
|
Q345C
|
≤0.20
|
≤0.55
|
1.00-1.60
|
≤0.035
|
≤0.035
|
Q345C low-alloy high-strength steel plates mechanical properties:
Grade |
Thickness
(mm)
|
Yield Strength (Mpa)
|
Tensile Strength
(MPa)
|
Elongation
(%)
|
Impact Energy
Min
|
|
Q345C
|
≤ 16
|
345
|
470-630
|
22
|
0
|
34J
|
|
> 16-35
|
325
|
470-630
|
22
|
0
|
34J
|
|
>35
|
295
|
470-630
|
22
|
0
|
34J
|
|
The min impact energy is longitudinal energy
|
Q345C low-alloy high-strength steel plates additional condition :
UT (Ultrasonic examination),AR(As Hot Rolled only),TMCP(Thermal Mechanical Control Processing),N(Normalized),Q+T(Quenched and Tempered),Z Direction Test(Z15,Z25,Z35) ,Charpy V-Notch Impact Test,HIC test, NDT ,PWHT( Simulated Post Weld Heat Treatment),NACE0175,The Third Party Test (Such as SGS Test), Coated or Shot Blasting and Painting.
Q345C low-alloy high-strength steel plates supply Ability: 5000M/T
Q345C low-alloy high-strength steel plates special Use: High-strength plate
Q345C low-alloy high-strength steel plates we bebon offered for our guests:
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