CCS FH40 Marine-Grade Steel Plates: High-Strength, Corrosion-Resistant Shipbuilding Solutions.
Certified for Harsh Marine & Arctic Conditions.
Marine-grade steel plates are specialized alloys engineered to withstand saltwater corrosion, dynamic loads, and extreme temperatures. CCS FH40 steel, approved by the China Classification Society (CCS), combines 390 MPa yield strength with -60°C impact toughness, making it ideal for ice-class vessels, offshore platforms, and LNG carriers.
Global Certifications & Compliance
- 9 IACS-Approved Societies: ABS, BV, CCS, DNV, GL, KR, LR, NK, RINA
- Compliance: EN 10025, ASTM A131, and CCS Rules for Steel Ships
- Corrosion Defense: Low-carbon base (≤0.18% C) + ultra-low sulfur (≤0.035%) minimizes pitting14
Technical Specifications
Chemical Composition (Max Wt%)
| Grade | C | Si | Mn | P | S | Al |
|---|---|---|---|---|---|---|
| AH40 | 0.18 | 0.50 | 1.60 | 0.035 | 0.035 | 0.015 |
| DH40 | 0.18 | 0.50 | 1.60 | 0.035 | 0.035 | 0.015 |
| EH40 | 0.18 | 0.50 | 1.60 | 0.035 | 0.035 | 0.015 |
| FH40 | 0.18 | 0.50 | 1.60 | 0.035 | 0.035 | 0.015 |
Alloy Additives:
- Niobium (Nb): Enhances weldability and fatigue strength
- Vanadium (V): Improves tensile-to-yield strength ratios
- Titanium (Ti): Stabilizes microstructure during thermal cycles
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact Test Temp (°C) | Charpy V-Impact (J) |
|---|---|---|---|---|---|
| AH40 | ≥390 | 510–660 | ≥20 | 0 | 41 |
| DH40 | ≥390 | 510–660 | ≥20 | -20 | 41 |
| EH40 | ≥390 | 510–660 | ≥20 | -40 | 41 |
| FH40 | ≥390 | 510–660 | ≥20 | -60 | 41 |
Performance Highlights:
- 660 MPa Tensile Strength: Exceeds standard A-grade ship plates by 22%^[CCS Rules]^
- -60°C Toughness (FH40): Certified for Arctic drilling rigs and polar-class vessels
- Controlled Rolling (TMCP): Ensures uniform thickness (2.5–120mm) and Z35 certification
Applications
- Shipbuilding: Hulls, bulkheads, and decking for cargo ships, tankers, and naval vessels.
- Offshore: Oil rig platforms, subsea pipelines, and floating docks.
- Cryogenic: LNG storage tanks, polar exploration ships, and icebreaker hulls.
Competitive Advantages
- Cost Efficiency: 18% lower lifecycle costs vs. stainless steel alternatives
- Weldability: Pre-heating not required for thicknesses ≤30mm (AWS D1.1 compliant)
- Delivery: Mill-scaled, shot-blasted, or primed surfaces with VCI corrosion inhibitors
Surface Treatment & Dimensions
- Shot Blasting: Achieves Sa2.5 cleanliness (ISO 8501) for superior paint adhesion^[EN 10163]^
- Thickness: 2.5–120mm (thermomechanical rolling for ≤100mm)
- Width: 1,000–3,000mm (precision-cut via plasma or laser)
- Length: Customized up to 18m (stress-relieved edges available)
Certifications & Logistics
- Mandatory: CCS/ABS mill certificates + EN 10204 3.1
- Testing: Charpy V-notch, PMI, ultrasonic flaw detection
- Packaging: Waterproof wrapping + edge guards for sea freight
Logical Connectors:
- Comparison: While stainless steel resists corrosion, FH40 balances strength and affordability.
- Example: For instance, LNG carriers use FH40 for cryogenic tanks.
- Cause-Effect: Low sulfur (0.035%) reduces hydrogen-induced welding defects.
Request certification details or project quotes today!
MOQ 20MT. Lead time: 15–25 days. Global shipping available.
Packing And Delivery
