ABS DH32 Shipbuilding Steel Plate Supplier

Technical Reviewer: Jack | SHH STEEL Material Solutions Department · Updated: 2026-10-27

Equivalent grades: ABS DH32 ≈ ASTM A131 Grade DH32 ≈ DNV NV D32 ≈ LR DH32 ≈ BV DH32 ≈ CCS D32 / DH32 ≈ NK KD32 ≈ KR RD32 ≈ RINA DH32 ≈ GB 712 Grade DH32 (all class-approved, stamped by the issuing society).

ABS DH32 is a higher-strength hull structural steel under ABS Rules Part 2, Chapter 1, Section 3 (2-1-3). It belongs to the D-class (−20 °C) toughness group at strength level 32: minimum yield 315 N/mm², tensile 440–590 N/mm², elongation 22 % min. Plates are die-stamped AB/DH32 after ABS survey. DH32 pairs 315 N/mm² yield with −20 °C toughness — the usual higher-strength match to ordinary Grade D strakes.

Thickness coverage for plates: AH/DH/EH 32/36 and AH/DH/EH 40 / FH 32/36/40 are listed up to 150 mm (2-1-3/1). Ordinary-strength ABS Grade A / ABS B / ABS D / ABS E stay at 235 N/mm² yield; DH32 is selected when scantlings need the higher yield of the 32 band.

SHH STEEL supplies ABS DH32 from ABS-approved Chinese mills, stock or mill roll, with optional multi-class and EN 10204 3.2. Related pages: ABS DH36 / ABS DH40; same strength other toughness: ABS AH32 / ABS EH32 / ABS FH32.

Buyer note for DH32: DH grades are the higher-strength counterpart to ordinary Grade D: same −20 °C idea, but yield 315 N/mm². Normalized/TM/CR DH plate may carry the N mark (AB/DH32N). Live reference for ordinary strength: ABS Grade A.

Size range. Common market thicknesses for DH32 are about 6–80 mm (heavier plates available as per mill approval), widths 1500–3500 mm. Exact maximum thickness for a given delivery condition is as per standard and mill certificate / ABS works approval.

Product (check) analysis column = heat (ladle) limit adjusted by ASTM A6/A6M-19 Table A “Permitted Variations in Product Analysis”, as required by ABS Rules Part 2, 2-1-2/5.3 (maximum + “over”, minimum − “under”; row chosen by the specified upper limit); arithmetic shown in brackets.

Source: ABS 2-1-3/7.3 Table 1. Heat (ladle) analysis must meet the table. Product (check) analysis, when required, follows ABS 2-1-2/5.3 → ASTM A6 (or other national) tolerances — ABS itself publishes no numeric product limits. AH/DH/EH share one chemistry column; toughness is differentiated by impact temperature and Table 5 supply routes, not by C/Mn caps. TMCP steels must also meet Table 6 Ceq. Ask for product analysis and Ceq/Pcm on the certificate at enquiry.

Source: 2-1-3/7.3 Table 2. Alternative B specimen elongations (Table 3) for XH32:

Same tensile band applies to AH/DH/EH/FH 32; only impact temperature and chemistry group (FH vs AH/DH/EH) change across the letter.

Source: 2-1-3/7.3 Table 4 (full-size; either direction acceptable). Condition of supply and impact lot size follow Table 5 and depend on grain-refining element (Nb, V, Al, Al+Ti) and thickness. In brief for plates: AH grades allow “any” condition in thinner bands with 50 t lots; DH often N/TM/CR; EH/FH plate routes are predominantly N/TM with each-piece (P) impact in many cells. Exact route for your thickness is as per standard and mill certificate — state the required delivery condition on the PO.

TMCP DH32: carbon equivalent caps 0.36 % (t ≤ 50) and 0.38 % (50 < t ≤ 100) per Table 6; over 100 mm Ceq agreed with ABS at mill qualification.

Minus tolerance 0.3 mm (2-1-1/15.3.2). Plus/flatness/width/length per ASTM A6 or as agreed. Surface repair per 2-1-1/3; state primer/surface class in the order if needed.

Quantities are approximate and change daily; all stock plates carry AB/DH32 marking and ABS-endorsed mill certificates. Sizes outside the table are produced in the next mill rolling cycle, typically 3–6 weeks including ABS survey (as per standard and mill certificate for exact lead time). Send your size list and we will reply with stock vs roll.

Packing. Plates are bundled by size with steel strapping, marked with heat number, grade and ABS stamp, and shipped in containers (up to about 11.8 m) or break bulk for longer plates.

Comparisons, not substitutions. Multi-class stamps require joint survey before rolling.

Pick DH32 when the drawing specifies higher-strength grade DH32 (or the society equivalent). Do not substitute ordinary Grade D unless the designer recalculates scantlings — yield differs (315 vs 235). Within the 32 band, letter choice is toughness: AH 0 °C → DH −20 °C → EH −40 °C → FH −60 °C. Within the DH letter, strength steps 32 → 36 → 40 raise yield from 315 to 355 to 390 N/mm².

For yields above 390 N/mm² ABS moves to Extra High Strength (2-1-8, AQ43/DQ47…), commercially often titled AH42/AH46 — see ABS AH42 and siblings.

When ABS DH32 is the right choice: typical uses are higher-strength members that the material class table assigns to −20 °C, such as thicker deck and bottom strakes, sheer strakes and hatch coamings. The Charpy temperature (−20 °C) is fixed by the letter, and the strength by the number (ReH 315 N/mm²). Pick the strength from the scantling calculation and the letter from the material class and design temperature on the approved drawing. Swapping to a different letter or strength needs class approval of the drawing change, not just a new purchase order.

Typical uses: higher-strength members needing −20 °C; ice-class and cold-route primary structure where DH32 is drawn. See offshore platform steel plates when primary offshore grades apply.

Welding: higher-strength hull steels need approved higher-strength consumables matched to required weld-metal toughness; preheat and heat input follow the approved WPS and often track Ceq/Pcm from the mill certificate (as per standard and mill certificate). TMCP DH32 must respect Table 6 Ceq caps. Cutting by oxy-fuel/plasma/laser is routine; thick QT/FH plate may need hydrogen control — follow mill recommendations.

Within the DH letter, moving 32 → other strengths (ABS DH36, ABS DH40) changes yield/tensile/elongation and Table 4 energies, not the Charpy temperature (−20 °C). Pick strength from the scantling; pick letter from the design temperature.

Processing notes for ABS DH32: cold forming of DH32 is routine within normal shipyard radii. Line heating and fairing of TMCP plate should stay within the temperature limits recommended by the mill, because overheating can reduce the strength gained in controlled rolling. Check the delivery condition on the certificate before planning hot forming.

ABS survey at the mill; certificate includes ladle chemistry, Ceq where applicable, tensile, Charpy at −20 °C, delivery condition and plate identity. Optional EN 10204 3.2, UT (U), Z-direction, multi-class. On receipt: verify AB/DH32 stamp, −20 °C impact data, energies ≥ Table 4, thickness ≥ nominal − 0.3 mm.

Charpy acceptance for ABS DH32 by thickness (from 2-1-3; actual results as per standard and mill certificate):

On receipt, check that the test temperature on the certificate is −20 °C and that the energy matches the band for the delivered thickness, not the thinnest band. Also check that the plate number on the stamp matches the certificate line, and that the ABS Surveyor endorsement is present. If UT was ordered (e.g. EN 10160 or ASTM A578 level), check the UT report as well. If the PO asked for 3.2, the inspector’s report must name the witnessed tests and plate numbers.

• Ordering “ABS 32” without the letter (AH/DH/EH/FH) — toughness class missing
• Accepting ordinary-strength Grade D certificates for a DH32 PO
• Ignoring TMCP Ceq caps (0.36/0.38) on TM plate
• FH chemistry (tighter P/S, N) not checked when the PO says FH
• Coil-cut plate without coil approval
• Missing ABS endorsement on the MTC
• Stock vs mill roll for ABS DH32?: Common 8–25 mm DH32 is often available from China stock with DH32 marking; thicker or QT/FH routes are usually mill-roll with ABS survey (about 3–6 weeks as a commercial estimate — confirm per order).

Write grade, delivery condition, impact temperature and certificate type into the PO.

Specify ABS DH32 (2-1-3), delivery condition (AR/CR/N/TM/QT as applicable), thickness × width × length × qty, Z/U, multi-class, certificate type, port. Send to SHH STEEL.

Sample PO line: “Steel plate to ABS Rules Part 2 2-1-3, Grade DH32, delivery condition [AR/CR/N/TM/QT], 20 × 2500 × 12000 mm, 30 pcs, marked AB/DH32, certificate endorsed by ABS Surveyor, EN 10204 3.2 [if required], UT [if required], CIF [port].” Each bracketed item changes price, lead time and which mills can supply, so fix them at enquiry stage.

ABS DH32 is higher-strength hull steel: yield 315 N/mm², tensile 440–590 N/mm², Charpy at −20 °C, marking AB/DH32. Lock on the order: delivery condition per Table 5, impact lot size, TMCP Ceq if TM, product analysis if needed, multi-class and 3.2.

SHH STEEL supplies DH32 from ABS-approved mills with Surveyor-endorsed certificates, stock or roll, optional 3.2 and multi-class.

T/T or L/C with inspection before balance; mixed containers; photo follow-up; in-house cutting/bevelling/drilling/machining.

Request a quotation: send SHH STEEL ABS DH32, sizes, qty, port and any multi-class/Z/U/3.2 needs.