GB713 boiler quality Q245R pressure vessel steel plate properties

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.

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

GB713 boiler quality Q245R pressure vessel steel plate properties

GB713 boiler quality Q245R pressure vessel steel plate properties

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GB713 boiler quality Q245R pressure vessel steel plate is carbon steel, and suitable for pressure parts of boilers and pressure vessels at medium and normal temperature use. The thickness range of Q245R pressure vessel steel plate is 3mm-250mm.

The allowable thickness tolerance of Q245R pressure vessel steel plate shall be in accordance with class B deviation of GB / T 709. According to the requirements of the demander, the Q245R steel plate with Class C deviation in GB / T 709 can be supplied. According to the requirements of the demander, Q245R pressure vessel steel plate with more strict thickness tolerance can be supplied through the agreement between the supplier and the demander.

GB713 boiler quality Q245R pressure vessel steel plate chemical composition ( max, %):


Grade

C

Si

Mn

Cu

Ni

Cr

Mo

Nb

V

Ti

Alt

P

S

Other

Q245R

0.20 

0.35

0.50-1.10

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 Q245R pressure vessel steel plate supplier and the demander, the lower limit of C content may not be required.

  1. For Q245R steel plate with thickness greater than 60 mm, the upper limit of manganese content can be increased to 1.20%.
  1. Trace niobium, vanadium and titanium can be added to Q245R steel, and their contents should be filled in the quality certificate. The total contents of the above three elements should not be greater than 0.050%.
  2. According to the requirements of the demander, the carbon equivalent of Q245R steel can be specified, and the value shall be determined by both parties.

 

GB713 boiler quality Q245R pressure vessel steel plate mechanical property: 


Thickness (mm)

> 3 ≤ 16

> 16 ≤ 36

> 36 ≤ 60

>60 ≤ 100

>100 ≤ 150

>150 ≤ 250

Yield strength (≥Mpa)

245

235

225

205

185

175

Tensile strength (Mpa)

400-520

390-510

380-500

370-490

Elongation

≥25%

≥24%

Q245R pressure vessel steel plate shall do 0℃ impact test. And the min. impact energy is 34J. According to requirements of the demander, Q245R steel plate can do -20℃ impact test to replace 0℃ impact test, and the impact energy should not be lower than 34J. The delivery state of Q245R steel plate can be hot rolled (HR), controlled rolled (CR), or normalized (N).

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