The 32 strength class uses a 315 MPa minimum yield and 440–570 MPa tensile range.
Global Steel Supply & Processing
IACS UR W11 Rev.9 · DH32 / D32 · 315 MPa yield · −20°C Charpy
Source DH32 plate for classed hull structures and shipyard fabrication. Share your thickness schedule, total tonnage, nominated class and destination port for an order-specific quotation.
*31 J minimum average longitudinal impact energy at −20°C for full-size test specimens and t ≤ 50 mm; approval and testing follow IACS and class rules.
Share the D32 strength class, plate dimensions, producing mill approval and −20°C impact-test scope to prepare a complete steel plate enquiry.
| Steel grade | DH32 (D32 / HD32 in applicable class designations) |
| Grade family | Higher-strength hull structural steel, 32 strength class |
| Technical basis | IACS UR W11 Rev.9 and the nominated classification society rules |
| Minimum yield strength | 315 MPa |
| Tensile strength | 440–570 MPa |
| Elongation | 22% minimum on standard proportional gauge (test provisions apply) |
| Impact temperature | −20°C for Grade DH32 (D32) |
| Reference plate thickness | IACS UR W11 plate provisions primarily cover up to 100 mm; actual producer approval governs the order |
| Plate size | Requested thickness × width × length, checked against supply and mill approval |
| Delivery condition | Class-approved rolling/heat-treatment route selected for thickness and grain refining practice |
| Material documents | Heat traceability, tensile and −20°C Charpy records, and required class material certification |
| Quoted supply | DH32 grade, class society, sizes, MT or plates, inspection scope and destination port |
The relevant class rules, producing mill approval range, specimen requirements and plate condition govern material acceptance.
For DH32, verify the −20°C impact acceptance against each ordered thickness band and specimen orientation.
| Nominal thickness | Impact temperature | Longitudinal min. avg. | Transverse min. avg. |
|---|---|---|---|
| t ≤ 50 mm | −20°C | 31 J | 22 J |
| 50 < t ≤ 70 mm | −20°C | 38 J | 26 J |
| 70 < t ≤ 100 mm | −20°C | 46 J | 31 J |
The 32 strength class uses a 315 MPa minimum yield and 440–570 MPa tensile range.
Impact energy rises with plate thickness; confirm the actual Charpy records by heat and test orientation.
Confirm the relevant mill approval, steelmaking route, thickness range and survey document package.
Use the producer’s heat analysis and the relevant class-approved steelmaking practice to verify DH32 chemistry and weldability.
| 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.
The Mn minimum may be 0.70% at thicknesses up to 12.5 mm under the IACS proviso. The actual class-approved composition, grain-refining practice and material certificate govern acceptance.
Use the nominated hull steel grade and impact criteria from your approved drawings when preparing the shipyard plate schedule.
Grade-traceable DH32 plate for ship shell segments, welded hull blocks and selected structural assemblies.
Plate components used for decks, longitudinals and stiffened sections where DH32 is specified.
Specified DH32 shell plate for the nominated hull region and class impact requirement.
Deck supports, local gussets and welded connection assemblies.
Internal structural plate parts prepared to shipyard drawings.
Welded longitudinal and transverse hull structural members.
Replacement plates matched to ship class and repair documentation.
Batch-identified steel plate for planned newbuild and repair deliveries.
Send the DH32 dimensions, −20°C impact-test scope, classification society and delivery port.
Ship classification acceptance follows approval of the actual producing works and the ordered grade, thickness, delivery state and inspection route.
Check approval of the producing mill for DH32/D32, plate thickness and rolling condition.
Confirm 315 MPa minimum yield, tensile properties and −20°C Charpy values for the ordered plate.
Identify heat/plate marks, classification survey and the certificate package required for delivery.
Confirm the plate’s surface finish, straightness, edge condition and dimensions to the shipyard acceptance schedule.
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.
Select the class-approved rolling condition according to the DH32 plate thickness and the producing mill’s grain-refining practice.
For Nb/V grain refinement, any condition may apply through 12.5 mm; the applicable class rules govern acceptance.
For thicker plates, normalized or controlled-rolled delivery is used within the approved mill and grain-refining route.
TMCP is an approved route for applicable thicknesses, with CE and toughness verification tied to the specified class.
Additional through-thickness, welding or inspection conditions are included according to approved project requirements.
| Grain-refining route | Thickness | IACS W11 delivery reference |
|---|---|---|
| Nb and/or V | ≤12.5 mm | Any approved condition |
| Nb and/or V | >12.5–100 mm | Normalized, controlled rolled or TMCP |
| Al alone or with Ti | ≤20 mm | Any approved condition |
| Al alone or with Ti | >20–25 mm | As-rolled only subject to special class approval; otherwise approved route |
| Al alone or with Ti | >25–100 mm | Normalized, controlled rolled or TMCP |
Coordinate your lower-temperature impact requirement and shipyard plate schedule with a manufacturing-scale steel supplier.
Our company-wide annual steel output spans multiple grades and supports repeat procurement programmes.
Your exact DH32 dimensions and tonnage are reviewed for actual stock or production supply.
Check the approved producing mill, −20°C Charpy tests and required class material documents for each order.
Coordinate plate markings, packing, shipping batches and destination port in one RFQ.
BAOSTEEL METAL operates across steel product categories with 8 million metric tons of actual annual production, 500,000 m² of factory area and more than 1,000 employees. For DH32 plate, the producing mill’s class approval and applicable thickness are checked for your order.
Our regular company-wide steel inventory covers multiple grades and product forms. Send your DH32 thickness list, required classification society and target delivery window for a specific stock or production review.
Specify material identification, DH32 grade, plate thickness and nominated class when requesting a test and survey document package.
Estimate the plate tonnage from nominal dimensions before submitting your shipyard purchasing schedule.
Nominal plate density: 7,850 kg/m³. Commercial tonnage follows the agreed measurement and contract.
A complete enquiry identifies the material grade, class route, impact-test requirements and shipment destination.
Share your shipyard plate schedule and approved project documents for review.
Send drawings, plate dimensions and finished tolerances alongside your hull plate order for an available processing route.
Cutting suitability assessed against thickness and the requested plate profile.
Thermal cutting routes reviewed for the part size, plate condition and edge requirements.
Finished drilling details and prepared edges quoted with your shipyard drawings.
Provide the ordered DH32 plate sizes, class document requirements, loading restrictions and destination port. Your quotation will confirm packaging and shipment arrangements.
Choose your steel grade by specified yield class and Charpy test temperature, then open the detailed grade page.
Strength and Charpy requirements are grade-specific. Select the material required by the approved hull drawing and nominated class rules.
315 MPa minimum yield and a 0°C reference impact temperature.
View grade →315 MPa minimum yield with −20°C reference Charpy testing.
315 MPa minimum yield with −40°C reference Charpy testing.
View grade →IACS UR W11 gives DH32 / D32 a minimum yield strength of 315 MPa, tensile strength from 440 to 570 MPa and 22% proportional elongation, subject to the applicable tests.
DH32 uses −20°C Charpy V-notch testing. The longitudinal minimum average is 31 J up to 50 mm, 38 J over 50 to 70 mm, and 46 J over 70 to 100 mm for full-size specimens.
Specify the class society, vessel requirements and plate dimensions. The producing mill approval, delivery condition, heat identification, impact results and required class survey certificate are confirmed for the order.
Send your plate thickness, width, length, tonnage or piece count, nominated class, −20°C inspection scope, delivery time and destination port.
Include cutting drawings, hole details and tolerances alongside the plate list. Suitable processing methods and the commercial scope can be confirmed in your quotation.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.