Hot-rolled hull structural steel plate for shipbuilding, vessel blocks, decks, bulkheads and marine structures. Compare ordinary-strength Grade A / B / D / E with higher-strength AH36 / DH36 / EH36, then specify your class society, plate schedule and certification requirements for a factory quotation.
Share your required grade, classification society, thickness, width, length, quantity, delivery condition and certificate scope. Our team will review the material and shipment details for your enquiry.
Explore shipbuilding steel grades ↓
Start with the required strength class, then confirm impact toughness, plate thickness, delivery condition and classification society. The two product routes below lead to dedicated grade pages.
Four ordinary-strength hull steel grades share the 235 MPa minimum yield class. Grade designation sets the applicable toughness route and inspection requirements.
Higher-strength 36-series hull steel combines a higher specified yield class with grade-specific Charpy V-notch toughness requirements.
AH32 / DH32 / EH32, AH40 / DH40 / EH40 and FH-series grades can be reviewed against the applicable standard, thickness, classification society and verified supply scope.
Identify the product specification and the classification rules stated in your vessel project. The applicable edition and implementation date should be confirmed against the ship contract and material certification application.
Product specification covering structural steel plates, shapes and bars intended primarily for ship construction. Includes ordinary-strength Grades A, B, D and E, and higher-strength AH, DH, EH and FH grade families.
Current IACS unified requirement on 2 November 2026 for normal- and higher-strength hull structural steels. Rev.10, published in September 2025, is scheduled to enter into force on 1 January 2027.
General requirements referenced by the product specification, together with the selected classification society rules, approved manufacturer scope, testing and certification conditions.
IACS UR W11 Rev.9 remains the current version on 2 November 2026. Rev.10 applies from 1 January 2027 for the implementation dates defined by IACS. Confirm the vessel contract date, material certification application date and classification society instructions before ordering.
Use the grade family as a starting point. Final mechanical properties and impact-test acceptance depend on the ordered specification, thickness, test direction, heat treatment and classification society.
| Grade family | Minimum yield strength | Tensile strength | Impact-test temperature route |
|---|---|---|---|
| Grade A / B / D / E | 235 MPa | 400–520 MPa | A: +20°C reference; B: 0°C; D: −20°C; E: −40°C |
| AH32 / DH32 / EH32 / FH32 | 315 MPa | 440–570 MPa | 0°C / −20°C / −40°C / −60°C |
| AH36 / DH36 / EH36 / FH36 | 355 MPa | 490–630 MPa | 0°C / −20°C / −40°C / −60°C |
| AH40 / DH40 / EH40 / FH40 | 390 MPa | 510–660 MPa | 0°C / −20°C / −40°C / −60°C |
Reference values follow IACS UR W11 mechanical-property tables. Grade A and Grade B impact-test requirements include thickness- and condition-specific provisions. Higher-strength 36-series values are shown as the IACS hull-grade route; confirm the corresponding product specification and class certificate for each order.
The grade number identifies a strength level, while the letter identifies a toughness route. Specify both the grade and the impact-test temperature in your purchase schedule.
Shipbuilding plate certification follows the vessel project, selected class society, approved steelworks, product grade and the inspection scope stated in the order.
American Bureau of Shipping
Det Norske Veritas
Lloyd’s Register
Bureau Veritas
China Classification Society
Korean Register
Nippon Kaiji Kyokai
RINA Services
State the classification society and certificate requirement in your RFQ. Manufacturer approval, approved grade range, thickness scope, survey attendance and product certificates must be verified for the actual supply route.
Select the material grade and toughness route according to the vessel design, structural position, plate thickness, service environment and classification requirements.
Plate for ship hull shell, bottom structures, side shell and other welded hull components specified by the vessel drawings.
Plate for deck panels, watertight bulkheads, internal framing and fabricated marine structural assemblies.
Welded plate components for block assembly, longitudinal members and hull structures.
Plate selected for deck structures and hatch-cover assemblies to approved drawings.
Plate for transverse and longitudinal bulkheads, web frames and stiffened structures.
Structural plate for equipment foundations, support structures and welded marine assemblies.
Replacement plate specified by vessel drawings, class requirements and approved repair procedures.
Project-specific structural plate enquiries reviewed against the applicable offshore standard and approval route.
Commercial ship hull structural steel follows hull-steel requirements such as IACS UR W11. Offshore high-strength welded structures can fall under separate requirements, including IACS UR W16, and should be specified separately.
Provide the complete plate schedule so grade, dimensions, delivery condition, testing and class certification can be reviewed together.
| Product | Hot-rolled hull structural steel plate |
| Grade | A / B / D / E; AH36 / DH36 / EH36; other approved grades by enquiry |
| Product standard | ASTM A131/A131M and applicable class rules |
| Dimensions | Thickness × width × length in mm |
| Delivery condition | As rolled, normalized, controlled rolled / TMCP or QT as applicable and approved |
| Testing | Tensile, Charpy V-notch, chemistry, dimensional and additional tests as ordered |
| Certification | MTC, heat traceability and class certificate / survey documentation as specified |
| Order quantity | Number of plates, net tonnage and plate-by-plate schedule |
Include the information below for a grade and certification review.
Confirm nominal thickness, width, length, flatness, surface quality and edge preparation against the approved shipbuilding drawing and applicable product requirements.
Plan marine steel procurement around your plate schedule, requested grade, inspection scope and export delivery requirements.
Actual annual steel production reaches 8 million metric tons across the company’s product range, supporting large-volume procurement planning.
Manufacturing ↗Regular company-wide steel inventory reaches 1 million metric tons. Ship plate availability is confirmed by grade, class route, thickness and quantity.
Steel Inventory ↗Review material certificates, heat traceability, mechanical testing, impact requirements and agreed third-party inspection.
Quality Control ↗Coordinate plate dimensions, marking, packing, shipment quantity and destination requirements through your RFQ.
Hull structural steel can be supplied under different rolling and heat-treatment conditions according to grade, thickness and classification requirements. Confirm the ordered condition in the RFQ and material specification.
Share your required grade, class society, plate schedule and tonnage for a supply review. Company-wide inventory covers multiple steel categories; grade-specific stock, approval scope and lead time are confirmed against each enquiry.
Shipbuilding plate inspection follows the ordered grade, product standard, classification society and approved inspection plan. Define the required tests and documents in your purchase order.
Add approved nesting files or fabrication drawings when your project requires prepared plate components. Specify grade, thickness, cut profile, bevel, dimensional tolerance and marking requirements for review.
Provide approved nesting files or fabrication drawings with plate grade, thickness, cut profile, bevel angle and dimensional tolerances. Processing arrangements are reviewed against the material condition and agreed fabrication procedure.
Estimate theoretical plate weight for an initial enquiry. Enter nominal plate dimensions, quantity and the reference density used for your calculation.
Formula: thickness × width × length × density ÷ 1,000,000,000 = kg per plate. Actual delivery weight follows the agreed measurement and commercial terms.
Send these details with your enquiry for a grade, class and delivery review.
Specify plate dimensions, bundle weight, handling requirements and destination port. Packing and shipment arrangements are coordinated with the confirmed order and transport method.
Review related structural and specialty plate ranges for your marine, infrastructure and industrial procurement projects.
Key details to prepare before requesting a marine structural steel quotation.
These ordinary-strength hull steel grades share a 235 MPa minimum yield class. Their grade letters define different toughness and impact-test routes. Requirements also depend on thickness and the applicable classification rules.
They belong to the 355 MPa higher-strength 36-series hull steel family under IACS W11. Their letter designations identify different impact-test temperature routes: AH, 0°C; DH, −20°C; and EH, −40°C.
ASTM A131/A131M covers structural steel plates, shapes and bars intended primarily for ship construction. IACS UR W11 sets harmonized requirements for normal- and higher-strength hull structural steels, alongside the selected classification society rules.
Common project routes include ABS, DNV, Lloyd’s Register, Bureau Veritas, CCS, KR, ClassNK and RINA. State the required society and certificate scope in your enquiry for verification.
Depending on grade, thickness and approval, the supply condition can include as-rolled, normalized, controlled rolled or TMCP. Quenched and tempered routes are specified for grades and orders that require them.
Specify chemical analysis, tensile testing, Charpy V-notch impact testing, dimensional inspection, surface inspection, UT and surveyor attendance. Material certificates and class documentation follow the confirmed order and approval route.
Provide grade, product standard, classification society, thickness, width, length, quantity, delivery condition, impact-test temperature, inspection requirements and destination port.
Provide approved nesting files or fabrication drawings with the grade, thickness, cut profile, bevel, tolerances and piece identification requirements for processing review.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.
