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Henan BEBON international co.,ltd located in zhengzhou ,henan province of china. Since it was established in 2008, Henan BEBON has earned an outstanding reputation for its professional exporting shipbuilding steel.About the products,we mainly specialized in steel products for shipbuilding which have been approved by some authoritative classification societies,likeLR,BV,ABS,DNV,GL and so on . Besides, we have three big warehouses--Zhengzhou,Tianjin and shanghai.
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Bulb flat shipbuilding steel

Bulb flat shipbuilding steel

Bulb flat shipbuilding steel

Bulb flat steel is a kind of medium section which mainly used in shipbuilding and bridging fields. Bulb flat shipbuilding steel is assisted medium section in shipbuilding field.

Bulb flat shipbuilding steel main advantages:

1. Appearance is smooth, no cracks, bulb flat shipbuilding steel has bonding strength with concrete.

2. Bulb flat shipbuilding steel with converter steelmaking is mainly use hot metal as raw material, the harmful elements in hot metal are less, the produced bulb flat shipbuilding steel has quality assurance.

3. Continuous casting billet cut-to-length ratio is high and can guarantee the bulb flat shipbuilding steel scale rate, to meet the needs of users.

4. The bulb flat shipbuilding steel economic benefit at present is 1.5 ~ 2 times of common medium section , and have a relatively stable market demand.

However, The biggest obstacle of bulb flat shipbuilding steel is too many specifications, too small volumes and too low yields.

In recent years, with the rapid development of the shipbuilding industry, thebulb flat shipbuilding steel has a exuberant demand. In the design of larger and regular ships the main hull is mostly chosen  bulb flat shipbuilding steel.

Bulb flat shipbuilding steel theoretical weight table

Model

Size

Weight

b

h

t

r1

r

kg/m

50X4(5#)

50

16

4

2.5

≤1.5

2.26

60X5(6#)

60

19

5

3.5

3.38

70X5(7#)

70

21

5

3.5

4

80X5(8#)

80

22

5

4

4.61

90X5.5(9#)

90

24

5.5

4

5.55

100X6(10#)

100

26

6

5

6.81

120X6.5(12#)

120

30

6.5

5

≤2.0

8.78

140X7(14a)

140

33

7

6

11.1

140X9(14b)

140

35

9

6

13.3

160X8(16a)

160

36

8

7

14.17

180X9(18a)

180

40

9

7

≤2.0

17.5

180X11(18b)

180

42

11

7

20.32

200X10(20a)

200

44

10

8

≤3.0

21.58

200X12(20b)

200

46

12

8

24.72

220X11(22a)

220

48

11

8.5

25.87

220X13(22b)

220

50

13

8.5

29.33

240X12(24a)

240

52

12

9

30.55

240X14(24b)

240

54

14

9

34.32

270X12(27a)

270

55

12

9.5

34.53

270X14(27b)

270

57

14

9.5

　

Bulb flat shipbuilding steel allowable deviation


Medol

6

h

t

5、6、7

±1.0

士O.5

+0.5
-0.4

8、9、10

士1.2

±0.5

12、14、16、18

士1.5

±O.8

+O.4
-O.6

20

±2.0

22、24、27

±2.5

±O.95

Bulb flat shipbuilding steel chemical composition


Model

Chemical Composition

C

Si

Mn

P

S

C+Mn/6

≤

 

A

≤0.23

0.10～0.35

≥2.5C

O.040

O.040

≤0.40

B

≤0.21

0.10～0.35

≥0.80

O.040

O.040

≤0.40

Bulb flat shipbuilding steel mechanical property


Grade

Tensile test

Cold bending test 180°
d=2a

V impact test

Yield point ós
/MPa

Tensile strength ób
/MPa

Percentage elongation δ5
(%)

 

Temperature /℃

Impact absorbing energy Akv/J

 

Longitudinal

Transverse

 

≥

A

≥235

400∽490

≥22

 

 

 

 

B

0

27

20

Bulb flat shipbuilding steel offered by BEBON has good quality to meet consumer's need. If need, we can reproduce the goods according to your requirements. If you are interested in it, please contact us.