Boiler seamless steel pipe - high pressure boiler seamless steel tubes (Chinese Standard-GB5310)

Standard:

Chinese national standard GB5310 ---------


Purpose:
For high-pressure boiler (working pressure 9.8MPa or more generally, the working temperature between 450 ℃ ~ 650 ℃) of heating surface tubes, header, economizer, superheater, reheater and so on.


The main production steel grades:

20G, 20MnG, 15MoG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG. After consultation, can also supply other grades of steel.

Mechanical properties:

Standard

Trademark

Tensile strength(MPa)

Yield strength(MPa)

Elongation(%)

GB5310

20G

410~550

≥245

≥24

20MnG

≥415

≥240

≥22

15MoG

450~600

≥270

≥22

15CrMoG

440~640

≥235

≥21

12Cr2MoG

450~600

≥280

≥20

12Cr1MoVG

470~640

≥255

≥21

Chemical composition:

Standard

Trademark

Chemical Composition

C

Si

Mn

P

S

Cr

Mo

Cu

Ni

V

GB5310

20G

0.170.24

0.170.37

0.350.65

≤0.030

≤0.030

/

/

≤0.20

≤0.25

/

20MnG

0.170.24

0.170.37

0.701.00

≤0.030

≤0.030

/

/

≤0.20

≤0.25

/

15MoG

0.120.18

0.170.37

0.400.80

≤0.030

≤0.030

/

0.250.35

≤0.20

≤0.30

/

15CrMoG

0.120.18

0.170.37

0.400.70

≤0.030

≤0.030

0.801.10

0.400.55

≤0.20

≤0.30

/

12Cr2MoG

0.080.15

≤0.50

0.400.70

≤0.030

≤0.030

2.002.50

0.901.20

≤0.20

≤0.30

/

12Cr1MoVG

0.080.15

0.170.37

0.400.70

≤0.030

≤0.030

0.901.20

0.250.35

≤0.20

≤0.30

0.150.35