GB3531 09MnNiDR pressure vessel steel plate for low temperature service

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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GB3531 09MnNiDR pressure vessel steel plate for low temperature service

GB3531 09MnNiDR pressure vessel steel plate for low temperature service

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09MnNiDR is Chinese pressure vessel steel grade under GB3531 specification, which is designed mainly for low temperature pressure vessels application, and the adatable temperature range is -196℃ to - 20℃. The density of 09MnNiDR steel is 7.85g/cm3. 09MnNiDR 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 09MnNiDR steel plate.

GB3531 09MnNiDR pressure vessel steel plate chemical composition:


Grade

C

SI

Mn

Ni

Mo

V

Nb

Alt

P,max

S,max

09MnNiDR

≤0.12

0.15-0.50

1.20-1.60

0.30-0.80

-

-

≤0.040

≥0.020

0.020

0.008

Notes: 1) In order to improve the properties of 09MnNiDR pressure vessel steel plate, Nb, V, Ti and other elements can be added to 09MnNiDR steel. Nb + V + Ti ≤ 0.12%. The elements content should be indicated in the quality certificate.

  1. As residual elements, the content of Cr and Cu should be no more than 0.25% respectively, Ni should be no more than 0.40%, and Mo should be no more than 0.08%. It can also not be analyzed if the supplier can guarantee the quality.  
  1. Alt can be replaced by the determination of Als, at this time, the content of Als should not be less than 0.015%; when Nb + V + Ti ≥ 0.015%, the Al content is not required for acceptance.

GB3531 09MnNiDR pressure vessel steel plate mechanical property:


Grade

Thickness,inmm

TensileStrength

YieldStrength,min

Elongation, %, min

09MnNiDR

6<T≤16

440-570

300

23

16<T≤36

430-560

280

36<T≤60

430-560

270

60<T≤120

420-550

260

GB3531 09MnNiDR pressure vessel steel plate needs to do impact test, the impact test temperature is -70℃, and the min. impact energy is 60J. The delivery state of 09MnNiDR pressure vessel steel plate is usually normalized or normalized and tempered. With the consent of the demander, 09MnNiDR steel plate with thickness greater than 60mm can be delivered by accelerated cooling and tempering after normalizing. The thickness range of 09MnNiDR pressure vessel steel plate is 5mm - 120mm.

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