Specified higher-strength hull structural class for applicable ship plate construction.
Global Steel Supply & Processing
IACS UR W11 · AH32 / A32 · Higher-strength hull plate · Class-dependent supply
Source AH32 hull plate with the required grade, thickness, classification society and inspection documents. Share your dimensions, quantity and destination port for a factory supply quotation.
*Reference longitudinal impact energy for plate thickness up to 50 mm; verification follows the class rules and order conditions.
Define the exact hull grade and class-approval route alongside your plate dimensions for a precise quotation.
| Steel grade | AH32 (A32 / HA32 designations under class rules) |
| Grade family | Higher-strength hull structural steel, 32 strength class |
| Technical basis | IACS UR W11 Rev.9 and the specified classification society rules |
| Minimum yield strength | 315 MPa |
| Tensile strength | 440–570 MPa |
| Elongation | 22% min. (standard proportional gauge, applicable conditions) |
| Impact temperature | 0°C for AH32 |
| Reference plate thickness | Common IACS requirements cover up to 100 mm; mill approval and product scope govern supply |
| Plate size | Thickness × width × length, confirmed against your RFQ |
| Delivery condition | Class-approved as-rolled / normalized / normalizing rolled / TMCP route as appropriate |
| Material documents | Heat traceability, tensile and Charpy test records and required class survey/certification |
| Quoted supply | Grade, class, thickness list, MT, target delivery and port |
Values are IACS reference requirements. The actual mill approval, thickness range, specimen requirements and classification survey procedures govern acceptance.
Specify specimen orientation and plate thickness, along with the required 0°C testing, when preparing classed shipbuilding procurement.
| Nominal thickness | Impact temperature | Longitudinal min. avg. | Transverse min. avg. |
|---|---|---|---|
| t ≤ 50 mm | 0°C | 31 J | 22 J |
| 50 < t ≤ 70 mm | 0°C | 38 J | 26 J |
| 70 < t ≤ 100 mm | 0°C | 46 J | 31 J |
Specified higher-strength hull structural class for applicable ship plate construction.
Thickness-related energy limits guide the required material verification.
Confirm approved mill, plate thickness, test route and certificates before purchase.
Review the ladle analysis for a higher-strength, killed and fine-grain-treated hull plate.
| Element | IACS Reference Requirement |
|---|---|
| Carbon (C) | ≤ 0.18% |
| Manganese (Mn) | 0.90–1.60%* |
| Silicon (Si) | ≤ 0.50% |
| Phosphorus (P) | ≤ 0.035% |
| Sulfur (S) | ≤ 0.035% |
| Acid-soluble aluminium (Al) | ≥ 0.015% where the Al route applies |
| Copper (Cu) | ≤ 0.35% |
| Chromium (Cr) | ≤ 0.20% |
| Nickel (Ni) | ≤ 0.40% |
| Molybdenum (Mo) | ≤ 0.08% |
The selected steelmaking practice may use aluminium, niobium, vanadium, titanium or an approved combination of grain-refining elements.
*For thickness up to 12.5 mm, the manganese minimum may be reduced to 0.70% under the IACS conditions. Fine-grain elements and chemistry variations follow the applicable class-approved manufacture and delivery route.
Review the structural function and impact requirement for each ship section before specifying plate size and delivery condition.
Plate material for approved hull shell strakes, block assemblies and welded structural members.
Structural plate components used in vessel decks, connections and reinforced sections.
Grade AH32 plate specified for designated hull zones and ship blocks.
Plates, connection details and supporting deck components.
Cut and formed plate parts for approved internal hull fabrication.
Welded longitudinal and transverse structural plate elements.
Replacement plate ordered against ship class and repair documentation.
Grade-identified plate for approved newbuild and repair schedules.
Send the vessel class, plate list and required inspection documentation with your RFQ.
For classed vessels, the actual producing works, grade, thickness range, condition of supply and survey route determine acceptance.
Check the actual plate maker’s class approval, applicable steel grade, thickness and approved delivery condition.
Confirm 315 MPa yield, specified tensile/elongation and 0°C impact testing for the relevant thickness band.
Confirm heat number, plate identification, inspection records and required class certificates in the quotation.
Provide the plate thickness and surface/edge acceptance conditions required by the shipyard drawing.
Surface quality, mill scale, plate identification and any protective treatment are specified in your order.
Nominal thickness, cut dimensions and inspection tolerances guide the acceptance plan.
Specify the class-approved product condition that matches your required thickness and fabrication route.
Certain thinner-plate routes may be accepted under the applicable class and approved grain-refining process.
Plate conditions agreed within the producing mill’s approval scope.
Thermo-mechanically controlled processing with class-dependent chemistry and weldability verification.
Impact, Z-direction or special welding requirements included when your vessel specification calls for them.
Factory-scale steel operations and specification-led coordination for project marine steel supply.
Our actual annual steel production spans multiple product lines, supporting repeat procurement planning.
Share AH32 grade and dimensions for a specific availability check against overall inventory and supply options.
Confirm approved mill, class society, 0°C impact requirements and certificate scope in the enquiry.
Combine plate dimensions, tonnage, packing instructions and destination into one supply quotation.
BAOSTEEL METAL reports actual company-wide steel production of 8 million metric tons annually, a 500,000 m² factory footprint and over 1,000 employees. AH32 class approval and the producing mill route are checked specifically for your purchase.
Our regular company-wide steel inventory covers multiple product categories. Send your AH32 thickness list, required class society and delivery window for a specific stock or production check.
Specify the grade, heat number, classification society, Charpy requirements and plate inspection scope at the beginning of your enquiry.
Calculate nominal steel plate weight before submitting quantities for your supply or vessel repair enquiry.
Nominal plate density: 7,850 kg/m³. Commercial tonnage follows the agreed measurement and contract.
Include the specifications that control price, approval and delivery.
Share your shipyard plate schedule and approved project documents for review.
Attach part drawings, tolerances and required finish details with your AH32 plate schedule.
Profile cutting assessed by plate thickness and cutting drawing.
Available processing routes reviewed for marine plate blanks.
Finished parts and hole requirements quoted as specified.
Plan your steel shipment around material identification, class documents, plate dimensions, loading method and receiving port. The final quotation will confirm applicable packing and delivery terms.
Browse the grade-specific pages for higher-strength hull plate categories and the ordinary-strength grade group.
Each grade follows separate strength, impact, chemistry and delivery requirements. Select the material designated by your vessel specification.
315 MPa minimum yield with a 0°C impact requirement for AH grade.
355 MPa minimum yield with AH impact route.
View grade →315 MPa minimum yield with −20°C reference Charpy testing.
View grade →AH32 requires 315 MPa minimum yield and a 440–570 MPa tensile range under the IACS hull structural steel reference, with test acceptance per the agreed class rules.
AH32 uses a 0°C reference impact temperature. Minimum average energy varies with thickness and specimen direction, as shown in the technical table.
Include the classification society, producing mill approval scope, material grade, thickness and required survey documentation in your RFQ. The supply route will be confirmed for the specific order.
Provide the AH32 grade, plate dimensions, tonnage, class society, delivery condition, Charpy/MTC requirements and port of destination.
Send the part drawing and cut list with dimensions, edge type and required tolerances. Available services can be reviewed with the supply quotation.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.