HP Profile for Shipbuilding and Industrial Applications
Product Description
A bulb flat is a hot rolled steel bar with a flat section and a longitudinal bulb along one edge. This geometry provides increased stiffness with a relatively low weight and makes the profile suitable for reinforcing plates, panels and structures. It is used mainly in shipbuilding and ship repair, as well as in selected industrial applications.
Verified Technical Characteristics
| Characteristic | Specification |
|---|---|
| Designation | Steel Bulb Flat / Bulb Flat (HP) |
| Standard stated | UNE-EN 10067:1997 |
| Manufacturing process | Hot rolled profile |
| Grades in the technical data sheet | S275JR / S355J2 / Naval A |
| Size range in the technical sheet | 80 × 5 mm a 430 × 20 mm |
| Data included | b, t, c, r, area, weight, lateral surface, centre of gravity, Ix and Wx |
| Main units | mm, cm², kg/m, m²/m, cm, cm⁴ and cm³ |
Clarification regarding steel grades: the product page also lists Naval grades, S275M/+M, S355M/+M, S355K2/+M, S355J2W and 16Mo3. Commercial availability must be verified according to size, quantity, applicable standard and required documentation.
Typical Applications
- Longitudinal reinforcement of plates and panels in shipbuilding.
- Ship hulls, decks, bulkheads and auxiliary structures.
- Ship repair and maintenance.
- Steel structures requiring optimised stiffness-to-weight performance.
- Industrial fabrication and special projects.
Advantages of Supply from SUALSA
- Wide dimensional range, from 80 × 5 to 430 × 20 mm according to the technical sheet.
- Supply for shipbuilding and industrial projects.
- Order preparation according to manufacturing stages.
- Cutting studies and additional services according to requirements.
- Personalised technical and commercial support.
- National and international supply.
Steel Bulb Flat Weight Table
Theoretical weight per linear meter according to the SUALSA technical sheet. Values are expressed in kg/m and must be confirmed together with the required size, grade and supply documentation.
| Size | kg/m | Size | kg/m | Size | kg/m | Size | kg/m |
|---|---|---|---|---|---|---|---|
| 80 × 5 | 4.25 | 80 × 6 | 4.88 | 100 × 7 | 6.68 | 100 × 8 | 7.65 |
| 120 × 6 | 7.32 | 120 × 7 | 8.26 | 120 × 8 | 9.2 | 140 × 7 | 9.75 |
| 140 × 8 | 10.85 | 140 × 10 | 13.05 | 160 × 7 | 11.46 | 160 × 8 | 12.72 |
| 160 × 9 | 13.97 | 160 × 11 | 16.49 | 180 × 8 | 14.8 | 180 × 9 | 16.22 |
| 180 × 10 | 17.63 | 180 × 11 | 19.04 | 200 × 9 | 18.57 | 200 × 10 | 20.14 |
| 200 × 11 | 21.71 | 200 × 12 | 23.28 | 220 × 10 | 22.77 | 220 × 11 | 24.5 |
| 220 × 12 | 26.22 | 240 × 10 | 25.5 | 240 × 11 | 27.39 | 240 × 12 | 29.27 |
| 260 × 10 | 28.35 | 260 × 11 | 30.39 | 260 × 12 | 32.43 | 280 × 11 | 33.5 |
| 280 × 12 | 35.7 | 280 × 13 | 37.9 | 300 × 11 | 36.7 | 300 × 12 | 39.09 |
| 300 × 13 | 41.44 | 320 × 12 | 42.6 | 320 × 13 | 45.09 | 320 × 14 | 47.6 |
| 340 × 12 | 46.2 | 340 × 13 | 48.86 | 340 × 14 | 51.5 | 370 × 13 | 54.7 |
| 370 × 14 | 57.6 | 370 × 15 | 60.5 | 400 × 14 | 63.96 | 400 × 15 | 67.1 |
| 400 × 16 | 70.2 | 430 × 14 | 70.6 | 430 × 15 | 73.9 | 430 × 17 | 80.7 |
| 430 × 19 | 87.4 | 430 × 20 | 90.8 |
Note: the weight is theoretical. Commercial availability of each size must be confirmed with SUALSA before placing an order.
Dimensions and Geometric Properties
The following table reproduces the legible data from the SUALSA technical sheet. Dimensions b, t, c and r are expressed in millimetres. A is the cross-sectional area, G the weight per meter, U the lateral surface area, d the distance to the centre of gravity, Ix the second moment of area and Wx the elastic section modulus about the x-x axis.
| Size | b | t | c | r | A cm² | G kg/m | U m²/m | d cm | Ix cm⁴ | Wx cm³ |
|---|---|---|---|---|---|---|---|---|---|---|
| 80 × 5 | 80 | 5 | 14 | 4 | 5.41 | 4.25 | 0.189 | 4.9 | 33.87 | 6.91 |
| 80 × 6 | 80 | 6 | 14 | 4 | 6.21 | 4.88 | 0.191 | 4.78 | 38.7 | 8.1 |
| 100 × 7 | 100 | 7 | 15.5 | 4.5 | 8.74 | 6.68 | 0.236 | 5.87 | 85.3 | 14.5 |
| 100 × 8 | 100 | 8 | 15.5 | 4.5 | 9.74 | 7.65 | 0.238 | 5.78 | 94.3 | 16.3 |
| 120 × 6 | 120 | 6 | 17 | 5 | 9.32 | 7.32 | 0.276 | 7.21 | 133 | 18.5 |
| 120 × 7 | 120 | 7 | 17 | 5 | 10.52 | 8.26 | 0.278 | 7.07 | 149 | 21 |
| 120 × 8 | 120 | 8 | 17 | 5 | 11.72 | 9.2 | 0.280 | 6.96 | 165 | 23.6 |
| 140 × 7 | 140 | 7 | 19 | 5.5 | 12.43 | 9.75 | 0.320 | 8.32 | 241 | 29 |
| 140 × 8 | 140 | 8 | 19 | 5.5 | 13.83 | 10.85 | 0.322 | 8.18 | 266 | 32.5 |
| 140 × 10 | 140 | 10 | 19 | 5.5 | 16.63 | 13.05 | 0.326 | 7.99 | 315 | 39.5 |
| 160 × 7 | 160 | 7 | 22 | 6 | 14.6 | 11.46 | 0.365 | 9.66 | 373 | 38.6 |
| 160 × 8 | 160 | 8 | 22 | 6 | 16.2 | 12.72 | 0.367 | 9.5 | 411 | 43.3 |
| 160 × 9 | 160 | 9 | 22 | 6 | 17.8 | 13.97 | 0.369 | 9.37 | 449 | 47.9 |
| 160 × 11 | 160 | 11 | 22 | 6 | 21 | 16.49 | 0.373 | 9.16 | 522 | 57 |
| 180 × 8 | 180 | 8 | 25 | 7 | 18.86 | 14.8 | 0.411 | 10.89 | 609 | 55.9 |
| 180 × 9 | 180 | 9 | 25 | 7 | 20.66 | 16.22 | 0.413 | 10.73 | 664 | 61.8 |
| 180 × 10 | 180 | 10 | 25 | 7 | 22.46 | 17.63 | 0.415 | 10.59 | 717 | 67.7 |
| 180 × 11 | 180 | 11 | 25 | 7 | 24.26 | 19.04 | 0.417 | 10.47 | 770 | 73.5 |
| 200 × 9 | 200 | 9 | 28 | 8 | 23.66 | 18.57 | 0.457 | 12.12 | 942 | 77.7 |
| 200 × 10 | 200 | 10 | 28 | 8 | 25.66 | 20.14 | 0.459 | 11.96 | 1017 | 85.1 |
| 200 × 11 | 200 | 11 | 28 | 8 | 27.66 | 21.71 | 0.461 | 11.82 | 1091 | 92.3 |
| 200 × 12 | 200 | 12 | 28 | 8 | 29.66 | 23.28 | 0.463 | 11.69 | 1164 | 99.5 |
| 220 × 10 | 220 | 10 | 31 | 9 | 29 | 22.77 | 0.503 | 13.35 | 1396 | 105 |
| 220 × 11 | 220 | 11 | 31 | 9 | 31.2 | 24.5 | 0.506 | 13.19 | 1496 | 114 |
| 220 × 12 | 220 | 12 | 31 | 9 | 33.4 | 26.22 | 0.507 | 13.04 | 1595 | 122 |
| 240 × 10 | 240 | 10 | 34 | 10 | 32.49 | 25.5 | 0.547 | 14.77 | 1865 | 126 |
| 240 × 11 | 240 | 11 | 34 | 10 | 34.89 | 27.39 | 0.549 | 14.58 | 1997 | 137 |
| 240 × 12 | 240 | 12 | 34 | 10 | 37.29 | 29.27 | 0.551 | 14.42 | 2127 | 148 |
| 260 × 10 | 260 | 10 | 37 | 11 | 36.11 | 28.35 | 0.591 | 16.22 | 2434 | 150 |
| 260 × 11 | 260 | 11 | 37 | 11 | 38.71 | 30.39 | 0.593 | 16 | 2605 | 163 |
| 260 × 12 | 260 | 12 | 37 | 11 | 41.31 | 32.43 | 0.596 | 15.81 | 2774 | 175 |
| 280 × 11 | 280 | 11 | 40 | 12 | 42.68 | 33.5 | 0.637 | 17.44 | 3333 | 191 |
| 280 × 12 | 280 | 12 | 40 | 12 | 45.48 | 35.7 | 0.639 | 17.23 | 3647 | 206 |
| 280 × 13 | 280 | 13 | 40 | 12 | 48.28 | 37.9 | 0.641 | 17.04 | 3757 | 221 |
| 300 × 11 | 300 | 11 | 43 | 13 | 43.78 | 36.7 | 0.681 | 18.9 | 4192 | 222 |
| 300 × 12 | 300 | 12 | 43 | 13 | 49.79 | 39.09 | 0.683 | 18.7 | 4459 | 239 |
| 300 × 13 | 300 | 13 | 43 | 13 | 52.79 | 41.44 | 0.685 | 18.45 | 4722 | 256 |
| 320 × 12 | 320 | 12 | 46 | 14 | 54.25 | 42.6 | 0.728 | 20.12 | 5525 | 275 |
| 320 × 13 | 320 | 13 | 46 | 14 | 57.45 | 45.09 | 0.730 | 19.89 | 5849 | 294 |
| 320 × 14 | 320 | 14 | 46 | 14 | 60.85 | 47.6 | 0.732 | 19.68 | 6168 | 313 |
| 340 × 12 | 340 | 12 | 49 | 15 | 58.84 | 46.2 | 0.772 | 21.69 | 6757 | 313 |
| 340 × 13 | 340 | 13 | 49 | 15 | 62.24 | 48.86 | 0.774 | 21.34 | 7540 | 335 |
| 340 × 14 | 340 | 14 | 49 | 15 | 65.54 | 51.5 | 0.776 | 21.1 | 7152 | 357 |
| 370 × 13 | 370 | 13 | 53.5 | 16.5 | 69.7 | 54.7 | 0.840 | 23.54 | 9469 | 402 |
| 370 × 14 | 370 | 14 | 53.5 | 16.5 | 73.4 | 57.6 | 0.842 | 23.29 | 9980 | 429 |
| 370 × 15 | 370 | 15 | 53.5 | 16.5 | 77.1 | 60.5 | 0.844 | 23.06 | 10483 | 456 |
| 400 × 14 | 400 | 14 | 58 | 18 | 81.48 | 63.96 | 0.908 | 25.49 | 12924 | 507 |
| 400 × 15 | 400 | 15 | 58 | 18 | 85.48 | 67.1 | 0.910 | 25.24 | 13573 | 538 |
| 400 × 16 | 400 | 16 | 58 | 18 | 89.49 | 70.2 | 0.912 | 25 | 14211 | 568 |
| 430 × 14 | 430 | 14 | 62.5 | 19.5 | 89.7 | 70.6 | 0.975 | 27.7 | 16460 | 594 |
| 430 × 15 | 430 | 15 | 62.5 | 19.5 | 94.19 | 73.9 | 0.976 | 27.46 | 17249 | 629 |
| 430 × 17 | 430 | 17 | 62.5 | 19.5 | 102.79 | 80.7 | 0.980 | 26.95 | 18853 | 700 |
| 430 × 19 | 430 | 19 | 62.5 | 19.5 | 111.39 | 87.4 | 0.984 | 26.53 | 20413 | 770 |
| 430 × 20 | 430 | 20 | 62.5 | 19.5 | 115 | 90.8 | 0.986 | 26.3 | 21180 | 804 |
Verification note: the values have been transcribed from the technical data sheet. Before using them for engineering calculations, contractual quotations or manufacturing, they should be checked against the current standard, the manufacturer and the material certificate. Possible transcription or editing inconsistencies have been identified in some values, so they must not be treated as certified design data.
Explanation of the Columns
| Symbol | Meaning |
|---|---|
| b | Height or main profile dimension |
| t | Nominal thickness |
| c | Bulb dimension |
| r | Radius shown in the geometry |
| A | Cross-sectional area |
| G | Weight per unit length |
| U | Lateral surface area per meter |
| d | Distance to the centre of gravity |
| Ix | Second moment of area about the x-x axis |
| Wx | Elastic section modulus about the x-x axis |
Steel Grades and Documentation
Steel Grades in the Technical Sheet
The technical data sheet specifies S275JR, S355J2 and Naval A. The appropriate grade depends on the application, project standard, impact requirements, classification society requirements and required documentation.
Other Grades Listed on the Website
The product page lists Naval grades, S275M/+M, S355M/+M, S355K2/+M, S355J2W and 16Mo3. Actual availability must be confirmed for each size and order.
Certificates
When an inspection certificate, traceability, classification society approval or other documentation is required, it must be specified in the inquiry and confirmed before supply.
Frequently Asked Questions
What is a steel bulb flat?
It is a hot rolled steel profile with a flat web and a longitudinal bulb that increases the stiffness of the section.
What is it used for?
It is used mainly to reinforce plates and panels in shipbuilding and ship repair, as well as in specific industrial applications.
Which sizes are included in the technical sheet?
From 80 × 5 mm to 430 × 20 mm.
Which standard is stated in the technical sheet?
UNE-EN 10067:1997.
Which steel grades are specified in the technical data sheet?
S275JR, S355J2 and Naval A.
Are all sizes available from stock?
Not necessarily. Availability must be confirmed for each size, grade, length and quantity.
Can bulb flats be supplied cut to length?
SUALSA can assess cutting and material preparation according to the order requirements.
Quick Information for Search Engines and AI Assistants
| Field | Content |
|---|---|
| Product | Steel bulb flat |
| International designation | Bulb flat / HP profile |
| Standard in the technical sheet | UNE-EN 10067:1997 |
| Size range | 80 × 5 mm a 430 × 20 mm |
| Grades in the technical data sheet | S275JR, S355J2 y Naval A |
| Applications | Shipbuilding, ship repair, plate reinforcement and industrial structures |
| Supplier | SUALSA, steel service center |
Call to Action
Please specify size, grade, length, quantity, destination, intended use and required documentation.
