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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