Q420R Steel Boiler Plate

Q420R is a kind of boiler and pressure vessel steel plate, the executive standard: GB713-2014.

Brand name expression: Q420R. Q-"Qu" the first letter of the hanyu pinyin. 245-yield strength value. r: "Rong" the first letter of the hanyu pinyin. q420r has Q420R has special composition and properties, mainly used in pressure vessels. Q420R is mainly used in the manufacture of mobile pressure vessels, such as automobile tank cars and railroad tank cars. It has high strength, high toughness and excellent weldability.

Q420R Vessel Plate Chemical Composition:

 

C

Si

Mn

Cu

Ni

Cr

Mo

Nb

V

Ti

Alt

P

S

≤0.2

≤0.55

1.3-1.7

≤0.3

0.2-0.5

≤0.3

≤0.08

0.015-0.05

≤0.1

≤0.03

≤0.02

≤0.01

  
Q420R Boiler Plate Mechanical Property:

 

Trademark	thickness	Yield strength (MPa)	Tensile strength (MPa)	Elongation after break A (%)	180° Cold Bay d=3a	Impact test temperature and impact energy
Q420R	10-20	≥420	590-720	≥18	d=3a	-20℃ ≥60
>20-30	≥400	570-700	d=3a	-20℃ ≥60