Bulb flat bar
HP80 to HP320 stiffener sections for hull framing, to GB/T 9945 and DIN 1019 profiles.
Hull steel grades
Mechanical properties to IACS UR W11. Chemical composition and impact energy are stated on the mill test certificate supplied with every shipment.
| Grade | Min. yield ReH | Tensile Rm | Elongation A5 | Impact test temp. | Availability | |
|---|---|---|---|---|---|---|
| A | 235 MPa | 400–520 MPa | 22% | Not required | Held in stock | |
| AH32 | 315 MPa | 440–570 MPa | 22% | 0 °C | Held in stock | |
| DH32 | 315 MPa | 440–570 MPa | 22% | -20 °C | Made to order | |
| EH32 | 315 MPa | 440–570 MPa | 22% | -40 °C | Made to order | |
| AH36 | 355 MPa | 490–630 MPa | 21% | 0 °C | Priority stock | |
| DH36 | 355 MPa | 490–630 MPa | 21% | -20 °C | Made to order | |
| EH36 | 355 MPa | 490–630 MPa | 21% | -40 °C | Made to order |
How to read this table
Impact energy in joules is not listed here because it varies with plate thickness and specimen orientation. The value that governs your order is the one on the mill test certificate, issued per heat.
Bulb flat sections
HP80 to HP320, to GB/T 9945 / DIN 1019 profiles. Theoretical weight per metre is stated on the order confirmation. Send the section and length for availability.
| Section | Grades available |
|---|---|
| HP80 | A / AH32 / AH36 |
| HP100 | A / AH32 / AH36 |
| HP120 | A / AH32 / AH36 |
| HP140 | A / AH32 / AH36 |
| HP160 | A / AH32 / AH36 |
| HP180 | A / AH32 / AH36 |
| HP200 | A / AH32 / AH36 |
| HP220 | A / AH32 / AH36 |
| HP240 | A / AH32 / AH36 |
| HP260 | A / AH32 / AH36 |
| HP280 | A / AH32 / AH36 |
| HP300 | A / AH32 / AH36 |
| HP320 | A / AH32 / AH36 |
How it's made
From steelmaking to the mill test certificate, every heat goes through the same sequence before it reaches stock.
- 01
Steelmaking & casting
Molten steel to the chemical composition specified for the grade, cast into slab.
- 02
Hot rolling
Slab rolled to the ordered thickness, width and length, or to profile for bulb flat and sections.
- 03
Heat treatment
Normalising or other treatment applied where the grade and thickness require it, to meet the specified impact test temperature.
- 04
Inspection & certification
Chemical and mechanical testing per heat, classification society survey where required, and the mill test certificate to EN 10204 3.1 or 3.2.
Quality control
Every heat is tested against the chemical composition and mechanical property limits in IACS UR W11, surveyed by the classification society where required, and released with its mill test certificate. Certificates are available on request.
Packaging & transport protection
Material is packed for export by sea, whether by container or breakbulk.
Anti-rust protection
Plate and sections are shipped with an anti-rust oil film to resist corrosion in transit; a heavier-duty protective coating can be arranged on request.
Bundling & edge protection
Material is strapped into bundles with steel or composite strapping, with corner protectors to prevent edge damage in handling.
Container & hold securing
Bundles are blocked and lashed inside the container or vessel hold to prevent shifting during the sea voyage.
Classification society approvals
Material is produced at the WISCO mill, which holds works approval from the nine classification societies below. Material is released with the mill test certificate for the relevant heat.
- CCS
- ABS
- DNV
- GL
- BV
- LR
- RINA
- KR
- NK
Tell us the grade, thickness and tonnage.
Send grade, thickness, dimensions and tonnage. You get availability, price and a lead time, normally within 24 hours.