Hot Rolled Bulb Flats - Marine Steel Sections - Hi-sea

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Hot Rolled Bulb Flats

Hot Rolled Bulb Flats

Application:

Bulb flats is one kind of steel sections with optimum weight ratio. They are used in shipbuilding as part of planking reinforcement. This kind of steel has many advantages compared with other reinforcement materials: 1. Bulb flats are the most economical reinforcement for shipbuilding; 2. They are more better in strength for weight ratio than other possible reinforcement; their shape lower the weld to the minimum during installation. They are produced by Chinese top steel mills with mature technology, strict quality management and rich industry experience. The bulb flats are in accordance with GB/T 9945-2012 and EN 10067. Customization is available. If you are interested in our hot rolled bulb flats, welcome to contact us.

The following table shows steel grades that we provide regularly for bulb flats:

Adopted Standard

Steel Grades

ABS Grade

AB/A, AB/AN, AB/B, AB/BN, AB/D, AB/DN, AB/E, AB/EN, AB/AH32, AB/AH32N, AB/DH32, AB/DH32N, AB/EH32, AB/EH32N, AB/AH36, AB/AH36N, AB/DH36, AB/DH36N, AB/EH36, AB/EH36N, AB/AH40, AB/AH40N, AB/DH40, AB/DH40N, AB/EH40, AB/EH40N

BV Grade

BVA, BVB, BVD, BVE, BVAH32, BVDH32, BVEH32,  BVAH36, BVDH36, BVEH36, BVAH40, BVDH40, BVEH40

CCS Grade

CCSA, CCSB, CCSD, CCSE, CCSAH32, CCSDH32, CCSEH32, CCSAH36, CCSDH36, CCSEH36, CCSAH40, CCSDH40, CCSEH40

DNV Grade

NV A, NV B, NV D, NV E, NV A32, NV D32, NV E32, NV A36, NV D36, NV E36, NV A40, NV D40, NV E40

GL Grade

GL-A, GL-ATM, GL-B, GL-BTM, GL-D, GL-DTM, GL-E, GL-ETM, GL-A32, GL-A32TM, GL-D32, GL-D32TM, GL-E32, GL-E32TM, GL-A36, GL-A36TM, GL-D36, GL-D36TM, GL-E36, GL-E36TM, GL-A40, GL-A40TM, GL-D40, GL-D40TM, GL-E40, GL-E40TM

KR Grade

KRA, KRB, KRD, KRE, KRAH32, KRDH32, KREH32, KRAH36, KRDH36, KREH36, KRAH40, KRDH40, KREH40

LR Grade

LRA, LRB, LRD, LRE, LRAH32, LRDH32, LREH32, LRAH36, LRDH36, LREH36, LRAH40, LRDH40, LREH40

NK Grade

KA, KB, KD, KE, KA32, KD32, KE32, KA36, KD36, KE36,, KA40, KD40, KE40

RINA Grade

RINA-A, RINA-B, RINA-D, RINA-E, RINA-AH32, RINA-DH32, RINA-EH32, RINA-AH36, RINA-DH36, RINA-EH36, RINA-AH40, RINA-DH40, RINA-EH40

Parameters of GB/T9945-2012 Hot Rolled Bulb Flats:

Model

Nominal Dimension

mm

Sectional Area

cm2

Nominal Weight

kg/m

b

t

h

r1

r

80×5

80

5

19

4

≦1.5

5.41

4.25

80×6

80

6

20

4

≦2

6.21

4.88

100×7

100

7

22.5

4.5

≦2

8.74

6.86

100×8

100

8

23.5

4.5

≦2

9.74

7.65

120×6

120

6

23

5

≦2

9.32

7.32

120×7

120

7

24

5

≦2

10.52

8.26

120×8

120

8

25

5

≦2

11.72

9.20

140×7

140

7

26

5.5

≦2

12.43

9.75

140×8

140

8

27

5.5

≦2

13.93

10.85

140×10

140

10

29

5.5

≦3

16.63

13.05

160×7

160

7

29

6

≦2

14.60

11.46

160×8

160

8

30

6

≦2

16.20

12.72

160×9

160

9

31

6

≦2

17.80

13.97

160×11

160

11

33

6

≦3

21.00

16.49

180×8

180

8

33

7

≦2

18.86

14.80

180×9

180

19

34

7

≦2

20.66

16.22

180×10

180

10

35

7

≦3

22.46

17.63

180×11

180

11

36

7

≦3

24.26

19.04

200×9

200

9

37

8

≦2

23.66

18.57

200×10

200

10

38

8

≦3

25.66

20.14

200×11

200

11

39

8

≦3

27.66

21.71

200×12

200

12

40

8

≦3

29.66

23.28

220×10

220

10

41

9

≦3

29.00

22.77

220×11

220

11

42

9

≦3

31.20

24.50

220×12

220

12

43

9

≦3

33.40

26.22

240×10

240

10

44

10

≦3

32.49

25.50

240×11

240

11

45

10

≦3

34.89

27.39

240×12

240

12

46

10

≦3

37.29

29.27

260×10

260

10

47

11

≦3

36.11

28.35

260×11

260

11

48

11

≦3

38.71

30.39

260×12

260

12

49

11

≦3

41.31

32.43

280×11

280

11

51

12

≦3

42.68

33.50

280×12

280

12

52

12

≦3

45.48

35.70

280×13

280

13

53

12

≦3

48.28

37.90

300×11

300

11

54

13

≦3

46.78

36.70

300×12

300

12

55

13

≦3

49.79

39.09

300×13

300

13

56

13

≦3

52.79

41.44

320×12

320

12

58

14

≦3

54.25

42.60

320×13

320

13

59

14

≦3

57.25

45.09

320×14

320

14

60

14

≦4

60.85

47.60

340×12

340

12

61

15

≦3

58.84

46.20

340×13

340

13

62

15

≦3

62.24

48.86

340×14

340

14

63

15

≦4

65.54

51.50

370×13

370

13

66.5

16.5

≦3

69.70

54.70

370×14

370

14

67.5

16.5

≦4

73.40

57.60

370×15

370

15

68.5

16.5

≦4

77.10

60.50

400×14

400

14

72

18

≦4

81.48

63.96

400×15

400

15

73

18

≦4

85.48

67.10

400×16

400

16

74

18

≦4

89.48

70.20

430×14

430

14

76.5

19.5

≦4

89.70

70.60

430×15

430

15

77.5

19.5

≦4

94.19

73.90

430×17

430

17

79.5

19.5

≦4

102.79

80.70

430×19

430

19

81.5

19.5

≦4

111.39

87.40

430×20

430

20

82.5

19.5

≦4

115.00

90.80

Tolerance on Dimensions:

Nominal Sizes

(mm)

Allowable Deviation (mm)

b

t

h

80~120

±1.5

+0.7

-0.3

±0.5

>120~180

±2.0

+1.0

-0.3

±0.8

>180~300

±3.0

+1.1

-0.3

±1.0

>300~430

±4.0

+1.3

-0.3

±1.1


Parameters of EN10067:1997 Hot Rolled Bulb Flats:

Nominal Size

Dimensions for

b

(mm)

t

(mm)

c

(mm)

r

(mm)

80×5

80×6

80

5

6

14

4

100×7

100×8

100

7

8

15.5

4.5

120×6

120×7

120×8

120

6

7

8

17

5

140×7

140×8

140×10

140

7

8

10

19

5.5

160×7

160×8

160×9

160×11

160

7

8

9

11

22

6

180×8

180×9

180×10

180×11

180

8

19

10

11

25

7

200×9

200×10

200×11

200×12

200

9

10

11

12

28

8

220×10

220×11

220×12

220

10

11

12

31

9

240×10

240×11

240×12

240

10

11

12

34

10

260×10

260×11

260×12

260

10

11

12

37

11

280×11

280×12

280×13

280

11

12

13

40

12

300×11

300×12

300×13

300

11

12

13

43

13

320×12

320×13

320×14

320

12

13

14

46

14

340×12

340×13

340×14

340

12

13

14

49

15

370×13

370×14

370×15

370

13

14

15

53.5

16.5

400×14

400×15

400×16

400

14

15

16

58

18

430×14

430×15

430×17

430×19

430×20

430

14

15

17

19

20

62.5

19.5

Tolerance on Dimensions:

Dimensions (mm)

Tolerances (mm)

b

t

>

≦

≧

≦

for b

for t

120

5

8

±1.5

+0.7

-0.3

120

180

7

11

±2.0

+1.0

-0.3

180

300

9

13

±3.0

+1.0

-0.4

300

430

12

20

±4.0

+1.2

-0.4


Angle steel in factory:

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