GB713 boiler quality Q345R pressure vessel steel plate stock

Pressure vessel steel plate covers a range of steel grades that are designed for use in pressure vessel, boilers, heat exchangers and any other vessel that contains a gas or liquid at high pressures.

Steel applications

Boiler Steel Plate is used for many applications where the pressure inside is significantly higher than atmospheric pressure.More..

GB713 boiler quality Q345R pressure vessel steel plate stock

GB713 boiler quality Q345R pressure vessel steel plate stock

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Accoridng to GB713 standard, the thickness of Q345R pressure vessel steel plate shall be within 3mm-250mm. And Q345R steel plate is mainly for pressure parts of boilers and pressure vessels at medium and normal temperature use. Q345R steel plate shall do 0℃ impact test with min. impact energy of 41J. However, if the demander asked, -20℃ impact test can be done to replaced 0℃ impact test for Q345R pressure vessel steel plate, and the impact energy should not be lower than 41J.

GB713 boiler quality Q345R pressure vessel steel plate chemical composition ( max, %):


Grade

C

Si

Mn

Cu

Ni

Cr%

Mo

Nb

V

Ti

Alt

P

S

Other

Q345R

0.20 

0.55

1.2-1.7

0.30 

0.30 

0.30 

0.08

0.05

0.05

0.03

≥0.02

0.025

0.01

Cu+Cr+Ni+Mo≤0.70

Notes: 1) After the agreement between Q345R steel plate supplier and the demander, the lower limit of C content may not be required.

  1. For Q345R pressure vessel steel plate with thickness greater than 60 mm, the upper limit of carbon content can be increased to 0.22%
  1. Trace niobium, vanadium and titanium can be added to Q345R steel, and their contents should be filled in the quality certificate. The total contents of the above three elements should not be greater than 0.12%.
  2. According to the requirements of the demander, the carbon equivalent of Q345R pressure vessel steel plate can be specified, and the value shall be determined by both parties.

 

GB713 boiler quality Q345R pressure vessel steel plate mechanical property: 


Grade

Thickness, in mm

Tensile Strength

Yield Strength, min

Elongation, %, min

Q345R

3<T≤16

510-640

345

21

16<T≤36

500-630

325

36<T≤60

490-620

315

60<T≤100

490-620

305

20

100<T≤150

480-610

285

150<T≤250

470-600

265

Q345R pressure vessel steel plate shall be delivered according to the theoretical weight, and the thickness used for the theoretical weight calculation shall be the arithmetic mean of the maximum thickness and the minimum thickness allowed for Q345R steel plate. The density of Q345R pressure vessel steel plate for calculation is 7.85 g / cm3.

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