Flat-bulb steel

The bulb flat steel is a kind of medium section material which is mainly used in the field of shipbuilding and bridge building, and the shipbuilding bulb flat steel is an auxiliary medium section material for shipbuilding.

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Product introduction Technical data

Product introduction

Flat-bulb steel are the most cost-effective, efficient and corrosion-resistant solution for plate stiffening requirements. Key advantages include an excellent strength to weight ratio delivering buckling resistance at a lower weight than with flat bars or angles.

The rounded edges of the flat-bulb steel profile mean there is no need for edge grinding prior to painting, saving time and money during fabrication. Paint degradation and the build up of corrosive debris is also reduced, extending life performance.

Technical data

Nominal dimension (mm)			Mass/unit length
b×t×h	r1	r	Mass/unit length
80×6×20	4	≤2	4.88
100×7×22.5	4.5	≤2	6.86
100×8×23.5	4.5	≤2	7.65
120×6×23	5	≤2	7.32
120×7×24	5	≤2	8.26
120×8×25	5	≤2	9.2
140×7×26	5.5	≤2	9.75
140×8×27	5.5	≤2	10.85
140×10×29	5.5	≤3	13.05
160×7×29	6	≤2	11.46
160×8×30	6	≤2	12.72
160×9×31	6	≤2	13.97
160×11×33	6	≤3	16.49
180×8×33	7	≤2	14.8
180×9×34	7	≤2	16.22
180×10×35	7	≤3	17.63
180×11×36	7	≤3	19.04
200×9×37	8	≤2	18.57
200×10×38	8	≤3	20.14
200×11×39	8	≤3	21.71
200×12×40	8	≤3	23.28
220×10×41	9	≤3	22.77
220×11×42	9	≤3	24.5
220×12×43	9	≤3	26.22
240×10×44	10	≤3	25.5
240×11×45	10	≤3	27.39
240×12×46	10	≤3	29.27
260×10×47	11	≤3	28.35

Nominal dimension (mm)			Mass/unit length
b×t×h	r1	r	Mass/unit length
260×11×48	11	≤3	30.39
260×12×49	11	≤3	32.43
280×11×51	12	≤3	33.5
280×12×52	12	≤3	35.7
280×13×53	12	≤3	37.9
300×11×54	13	≤3	36.7
300×12×55	13	≤3	39.09
300×13×56	13	≤3	41.44
320×12×58	14	≤3	42.6
320×13×59	14	≤3	45.09
320×14×60	14	≤4	47.6
340×12×61	15	≤3	46.2
340×13×62	15	≤3	48.86
340×14×63	15	≤4	51.5
370×13×66.5	16.5	≤3	54.7
370×14×67.5	16.5	≤4	57.6
370×15×68.5	16.5	≤4	60.5
400×14×72	18	≤4	63.96
400×15×73	18	≤4	67.1
400×16×74	18	≤4	70.2
430×14×76.5	19.5	≤4	70.6
430×15×77.5	19.5	≤4	73.9
430×17×79.5	19.5	≤4	80.7
430×19×81.5	19.5	≤4	87.4
430×20×82.5	19.5	≤4	90.8
Remark: Available length is 6m-20m, and grade is A, B, D, AH32, AH36, DH32 and DH36, please contact us for other requirements.