Key Characteristics:
High Strength:
CCS EH32 possesses a specified minimum yield strength and tensile strength, suitable for withstanding the stresses and loads experienced in shipbuilding and offshore environments.
Good Weldability:
The steel is designed for ease of welding, which is crucial for fabrication and assembly in shipbuilding.
Excellent Toughness:
CCS EH32 exhibits good impact resistance and toughness, ensuring the material can withstand dynamic loads and potential impacts.
Corrosion Resistance:
The steel's composition includes elements that contribute to its resistance against corrosion, which is vital for long-term durability in marine environments.
Applications:
Primarily used in the construction of ship hulls, offshore oil drilling platforms, and other marine structures.
Classification:
Certified by the China Classification Society (CCS), ensuring it meets the required standards for shipbuilding steel.
FAQ
1. What is the key advantage of CCS EH32 over DH32 in Arctic shipbuilding applications?
Answer:
CCS EH32 provides enhanced cryogenic performance with:
Same yield strength (≥315 MPa) as DH32
Stricter impact toughness at -60°C (vs. DH32's -40°C)
Improved crack resistance in polar ice conditions
Higher nickel content (0.80-1.50%) for low-temperature stability
2. What mechanical properties must EH32 plates meet per CCS certification?
Answer: Mandatory requirements:
| Property | Requirement | Test Standard |
|---|---|---|
| Yield Strength | ≥315 MPa | GB/T 228.1 |
| Tensile Strength | 440-590 MPa | GB/T 228.1 |
| Elongation (A50) | ≥22% | GB/T 228.1 |
| Charpy V-Notch | ≥34J @ -60°C | GB/T 229 |
| Bend Test | 180° (d=2t) | GB/T 232 |
(Standard values for thickness ≤50mm)
3. Where is EH32 steel typically used in marine structures?
Answer: Common applications:
Polar icebreaker hull plating (PC3-PC5 ice classes)
LNG carrier secondary barriers
Arctic offshore platform legs
Winter navigation vessel frames
Research vessel ice belts
4. What welding procedures maintain EH32's -60°C properties?
Answer: Critical protocols:
Preheating: 150-200°C (thickness-dependent)
Filler Metals: GB/T 5117 E5015-G (AWS E7015 equivalent)
Heat Input Limit: ≤25 kJ/cm
Post-Weld NDT: 100% UT for thickness >20mm
PWHT Recommendation: 580-620°C for thickness >30mm
5. How does EH32's chemical composition differ from DH32?
Answer: Key alloy differences (wt.%):
| Element | EH32 Range | DH32 Range | Purpose |
|---|---|---|---|
| Ni | 0.80-1.50 | 0.30-0.80 | Cryogenic toughness |
| C | ≤0.14 | ≤0.16 | Weldability |
| Mn | 1.30-1.70 | 1.20-1.60 | Strength |
| P+S | ≤0.018+0.005 | ≤0.020+0.010 | Purity |
Key: Lower carbon equivalent (CEV ≤0.38) for better welding
Hot Tags: ccs ship class ccs grade eh32 shipbuilding steel plate, China ccs ship class ccs grade eh32 shipbuilding steel plate manufacturers, suppliers, factory, ABS AH36 EH36 Marine Grade Steel Plate, ABS DH32 DH36 Shipbuilding Plate, CCS Garde A Shipbuilding Steel Plate, hull plate, Marine Grade Steel Plate, Shipbuilding Steel Plate
