GB/T 1591 Q390D hot rolled HSLA steel plates features:
Good comprehensive mechanical properties, good weldability as well as cold and hot processing and corrosion resistance, good low temperature toughness.
GB/T 1591 Q390D hot rolled HSLA steel plates application:
Q390D steel plates are used to build ships, boilers, pressure vessels, oil storage tanks, bridges, power station equipment, lifting and transportation machinery and other welded structures with higher loads.
GB/T 1591 Q390D hot rolled HSLA steel plates chemical composition:
Grade |
C % |
Si % |
Mn |
P % |
S % |
|
Q390D |
≤ 0.20 |
≤ 0.55 |
1.00-1.60 |
≤ 0.030 |
≤ 0.030 |
GB/T 1591 Q390D hot rolled HSLA steel plates mechanical property:
Grade |
Thickness |
Yield Strength (Mpa) |
Tensile Strength |
Elongation(%) |
Impact Energy |
|
|
(mm) |
(MPa) |
Min |
||||
|
Q390D |
≤ 16 |
390 |
490-650 |
20 |
-20 |
34 |
|
|
>16-35 |
370 |
490-650 |
20 |
-20 |
34 |
|
|
>35 |
350 |
490-650 |
20 |
-20 |
34 |
|
The min impact energy is longitudinal energy |
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GB/T 1591 Q390D hot rolled HSLA steel plates shall be done impacting test at low temperature minus 20 degree centigrade. Normalised heat treatment suggested to be done for Q390D steel plates in heavy thickness.
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