ABS Grade DH36 Shipbuilding Steel Plate
ABS Grade DH36 Shipbuilding Steel: Full Chemical, Mechanical & Physical Property Analysis with Equivalents
Comprehensive data on ABS Grade DH36 steel plate covering chemical composition, mechanical and thermal properties, international equivalents, similar grades, and application guide for shipbuilding and offshore structures.
Hot rolling, controlled rolling, normalizing, thermomechanical controlled processing (TMCP), welding, bending, flame cutting, shearing
- Phone : +8618037372205
- Email : [email protected]
- WhatsApp: Contact via Whtsapp
- WeChat: +8618037372205
ABS Grade DH36 Shipbuilding Steel Plate Introduction
ABS Grade DH36 is a high-strength structural steel plate primarily used in shipbuilding and offshore engineering. It is certified by the American Bureau of Shipping (ABS) under the Rules for Building and Classing Steel Vessels. As a normalized or thermomechanically rolled steel with a minimum yield strength of 355 MPa, DH36 offers good weldability and excellent toughness at low temperatures, with Charpy V-notch impact energy guaranteed at -20°C. Its fine-grain practice ensures superior mechanical properties and resistance to brittle fracture. Key attributes: high strength, low-temperature toughness, and good formability. Widely used in ship hulls, decks, and offshore platforms, DH36 meets the requirements of major international classification societies and is supplied under a variety of equivalent standards.
ABS Grade DH36 Shipbuilding Steel Plate Chemical Composition
The following chemical composition limits apply to ABS Grade DH36 per ABS Rules. Elements for grain refinement (Nb, V, Ti) may be added optionally. Residual elements are restricted to ensure weldability. Carbon equivalent (CE) is limited to ≤0.38% by IIW formula.
| Element | Standard Value (wt%) | Remarks |
|---|---|---|
| Carbon (C) | ≤0.18 | |
| Manganese (Mn) | 0.90 ~ 1.60 | |
| Silicon (Si) | ≤0.50 | |
| Phosphorus (P) | ≤0.035 | |
| Sulfur (S) | ≤0.035 | |
| Aluminum (Als, acid soluble) | ≥0.015 | Minimum when aluminum treatment used for grain refinement |
| Niobium (Nb) | 0.02 ~ 0.05 | Optional grain refining element |
| Vanadium (V) | 0.05 ~ 0.10 | Optional grain refining element |
| Titanium (Ti) | ≤0.02 | Optional grain refining element; may be present |
| Copper (Cu) | ≤0.35 | Residual |
| Chromium (Cr) | ≤0.20 | Residual |
| Nickel (Ni) | ≤0.40 | Residual |
| Molybdenum (Mo) | ≤0.08 | Residual |
| Carbon Equivalent (CE IIW) | ≤0.38 | Calculated as CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 |
ABS Grade DH36 Shipbuilding Steel Plate Thermal & Electrical Physical Properties
Typical physical properties for carbon-manganese shipbuilding steel at ambient temperatures. These values are design reference figures and may vary slightly based on exact composition and heat treatment.
| Property | Value | Unit | Test Conditions |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | 20°C |
| Elastic Modulus (E) | 205 | GPa | Room temperature |
| Shear Modulus (G) | approx. 80 | GPa | Room temperature |
| Poisson's Ratio (ν) | 0.3 | - | - |
| Thermal Expansion Coefficient (α) | 11.7 | 10⁻⁶/K | 20 - 100°C |
| Thermal Expansion Coefficient (α) | 12.3 | 10⁻⁶/K | 20 - 200°C |
| Thermal Conductivity (λ) | 51 | W/(m·K) | 20°C |
| Specific Heat Capacity (c) | 460 | J/(kg·K) | 20°C |
| Electrical Resistivity (ρ_e) | approx. 0.15 | μΩ·m | 20°C |
ABS Grade DH36 Shipbuilding Steel Plate Mechanical Properties
The following mechanical properties apply to ABS Grade DH36 in normalized or TMCP condition. Charpy impact tests are performed at -20°C. Elongation values are based on a gauge length of 200 mm for plate products.
| Property | Value | Unit | Test Conditions |
|---|---|---|---|
| Yield Strength (ReH) | ≥355 | MPa | Applicable for all thicknesses |
| Tensile Strength (Rm) | 490 ~ 620 | MPa | All thicknesses |
| Elongation (A) | ≥21 | % | Thickness ≤50 mm (gauge length 200mm) |
| Elongation (A) | ≥19 | % | Thickness >50 mm to 70 mm |
| Elongation (A) | ≥17 | % | Thickness >70 mm to 100 mm |
| Charpy V-notch Impact Energy (longitudinal) | ≥34 | J | -20°C |
| Charpy V-notch Impact Energy (transverse) | ≥24 | J | -20°C |
| Bend Test (180°) | No cracks | - | Mandrel diameter: 3t for t ≤ 25mm; 4t for 25mm < t ≤ 50mm; 5t for 50mm < t ≤ 100mm |
ABS Grade DH36 Shipbuilding Steel Plate Fully Equivalent Material Standards and Substitutable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| International (IACS) | UR W11 | DH36 | Unified requirement adopted by all member classification societies |
| USA | ASTM A131/A131M | Grade DH36 | Identical chemical and mechanical properties |
| Worldwide | ABS Rules | Grade DH36 | Original classification society |
| Worldwide | DNV Rules | DH36 | Det Norske Veritas, equivalent |
| Worldwide | BV Rules | DH36 | Bureau Veritas, equivalent |
| Worldwide | LR Rules | DH36 | Lloyd's Register, equivalent |
| Worldwide | CCS Rules | DH36 | China Classification Society, equivalent |
| Worldwide | NK Rules | DH36 | Nippon Kaiji Kyokai, equivalent |
| Worldwide | KR Rules | DH36 | Korean Register, equivalent |
| Worldwide | RINA Rules | DH36 | Registro Italiano Navale, equivalent |
ABS Grade DH36 Shipbuilding Steel Plate Application Introduction
ABS Grade DH36 is extensively used in marine and offshore construction. Its combination of high strength, good toughness, and weldability makes it suitable for critical structural components where low-temperature service and dynamic loading are expected. Processing methods include thermal cutting, cold forming, welding, and post-weld heat treatment when required.
Product Applications: Ship hulls and decks, Offshore platforms (jackets, topsides), Jack-up rigs, Floating production storage and offloading units (FPSO), Offshore wind turbine towers and transition pieces
Processed into products: Hull shell plates, Longitudinal stiffeners, Transverse bulkheads, Girders, Floor plates, Bracket plates, Base plates for deck machinery, Helideck structures, Crane pedestals
Application industries: Shipbuilding, Offshore oil & gas, Marine engineering, Renewable energy (offshore wind foundations)
ABS Grade DH36 Shipbuilding Steel Plate Similar / Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| International | ASTM A131 / IACS UR | AH36 | Same strength level, impact test at 0°C (≥34J) |
| International | ASTM A131 / IACS UR | EH36 | Same strength level, impact test at -40°C (≥34J) |
| International | ASTM A131 / IACS UR | FH36 | Same strength level, impact test at -60°C (≥34J) |
| International | ABS Rules / IACS | DH36 Z25 | Improved through-thickness property (Z25), same base properties |
| Europe | EN 10225 | S355G8+M | Offshore structural steel, similar strength and toughness, TMCP delivery |
Notes:
- For thick sections (e.g., above 30mm), preheating and careful hydrogen control are recommended to avoid cold cracking.
- Welding consumables should match the strength and toughness requirements; typical filler metals include E7018 or equivalent solid wires.
- Post-weld heat treatment (PWHT) is normally not required for DH36 except for stress relief in specific designs, and must follow relevant welding specification guidelines.
- Through-thickness properties can be ordered by specifying Z-quality (e.g., DH36-Z25) when high restraint joints are anticipated.
- Share
