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GB/T 1591 Q390D hot rolled HSLA steel plates steel plate

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

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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