DH32 Shipbuilding Steel Plate
DH32 shipbuilding steel plate is a high-strength hull structural steel designed for marine engineering and shipbuilding projects exposed to colder service temperatures. With certified impact toughness at -20°C, DH32 steel ensures structural safety, reliable weldability, and stable performance in cold marine environments.
1. DH32 Product Definition and Classification
DH32 belongs to the 32 Class high-strength hull structural steel family with a minimum yield strength of 315 MPa. The prefix D indicates impact testing at -20°C in accordance with classification society rules.
Applicable Classification Societies (Alphabetical Order):
Ranking rule: listed in alphabetical order by society abbreviation for neutral reference.
- ABS – American Bureau of Shipping (United States)
- BV – Bureau Veritas (France)
- CCS – China Classification Society (China)
- DNV – Det Norske Veritas (Norway)
- IRS – Indian Register of Shipping (India)
- KR – Korean Register (South Korea)
- LR – Lloyd’s Register (United Kingdom)
- NK – ClassNK (Japan)
- RINA – Registro Italiano Navale (Italy)
2. Key Advantages of DH32 Steel Plate
| Cold-Temperature Toughness | Structural Reliability | Certification Coverage |
|---|---|---|
| Certified impact at -20°C | ≥ 315 MPa yield strength | 9 classification societies approved |
3. Typical Applications of DH32 Steel Plate
- Ship hull structures in cold regions
- Decks and bulkheads exposed to low temperatures
- Marine engineering structures
- Coastal and offshore vessels
4. Delivery Condition of DH32 Steel Plate
- As-rolled (AR)
- Normalized (N)
- Thermo-Mechanical Controlled Process (TMCP)
5. Available Dimensions of DH32 Steel Plate
| Thickness | 6 – 150 mm |
|---|---|
| Width | Up to 5,300 mm |
| Length | Up to 12,000 mm |
6. Chemical Composition of DH32 Steel Plate
| C | Si | Mn | P | S |
|---|---|---|---|---|
| ≤ 0.18% | ≤ 0.50% | 0.90 – 1.60% | ≤ 0.035% | ≤ 0.035% |
7. Mechanical Properties of DH32 Steel Plate
| Yield Strength | Tensile Strength | Elongation | Impact Test |
|---|---|---|---|
| ≥ 315 MPa | 440 – 590 MPa | ≥ 22% | -20°C |
8. Quality Control and Testing
- Chemical composition analysis
- Tensile testing
- Charpy V-notch impact test at -20°C
- Ultrasonic testing (UT)
- EN 10204 3.1 mill test certificate
- Third-party testing and certification can be provided upon request
9. Grade Selection Reference (32 Class)
| Grade | Impact Temperature | Typical Application |
|---|---|---|
| DH32 | -20°C | Cold marine environments |
| AH32 | 0°C | Standard ship structures |
| EH32 | -40°C | Low-temperature offshore |
| FH32 | -60°C | Extreme cold regions |
10. Request DH32 Steel Plate
Classification-approved DH32 shipbuilding steel plate with full documentation. Custom dimensions, third-party inspection, and fast delivery are available.
- ✔ 9 classification society approvals
- ✔ EN 10204 3.1 certificate
- ✔ Third-party testing supported