سلس انبوب دعامة هيدروليكي

Steel Grade

Chemical composition

C

Si

Mn

P

S

Cr

Ni

Cu

Nb

Re

20

0.17-0.24

0.17-0.37

0.35-0.65

≤0.035

≤0.035

≤0.25

≤0.25

≤0.20

-

-

35

0.32-0.40

0.17-0.37

0.50-0.80

≤0.035

≤0.035

≤0.25

≤0.25

≤0.20

-

-

45

0.42-0.50

0.17-0.37

0.50-0.80

≤0.035

≤0.035

≤0.25

≤0.25

≤0.20

-

-

27SiMn

0.24-0.32

1.10-1.40

1.10-1.40

≤0.035

≤0.035

≤0.30

≤0.30

≤0.30

-

-

30MnNbRe

0.27-0.36

0.20-0.60

1.20-1.60

≤0.035

≤0.035

≤0.30

≤0.30

≤0.30

0.020-0.050

0.02-0.04

Steel Grade

Tensile Strength

MPa

Yield Strength

MPa

Elongation

%

Hardness

HB

20

34

45

400

510

590

245

305

335

20

17

14

-

27SiMn

980

835

12

217

30MnNbRe

850

720

13

-

Size(mm)

Tolerance

General

High Grade

OD

±1.0%

±0.75%

WT

≤20

±12.5%

+10%

＞20

+12.5%

-10%