GB713 Q420R grade is a kind of pressure vessel quality plate. This steel has high strength, high toughness and weldability, and is mainly used in the manufacture of mobile pressure vessels, such as automobile tank cars and railway tank cars.
Chemical composition ( %, by mass):
GB713 |
C |
Si |
Mn |
Cu |
Ni |
Cr |
Mo |
Nb |
V |
Ti |
Alt |
P |
S |
|
Q420R |
≤0.20 |
≤0.55 |
1.30-1.70 |
≤0.30 |
0.20-0.50 |
≤0.30 |
≤0.08 |
0.015-0.050 |
≤0.100 |
≤0.030 |
|
≤0.020 |
≤0.010 |
Mechanical properties:
GB713 |
Thickness, in mm |
Tensile Strength |
Yield Strength, min |
Elongation, %, min |
Temperature |
Impact energy (J) |
|
Q420R |
10<T≤20 |
590-720 |
420 |
18 |
-20 |
60 |
|
20<T≤30 |
570-700 |
400 |
According to user requirements, Q420R pressure vessel quality plate can be delivered in different states such as normalizing, tempering, normalizing and tempering, and quenching and tempering.
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