Thickness: 4mm to 260mm, Width: 1200mm to 4000mm Length: 3000mm to 18000mm.

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AH36/DH36/EH36 High-Strength Marine Steel Plates

Product Overview

AH36, DH36, and EH36 are advanced high-tensile shipbuilding steels certified by leading classification societies (ABS, DNV, CCS, LR, etc.). Designed for demanding marine environments, these grades deliver exceptional strength, low-temperature toughness, and corrosion resistance, making them ideal for critical ship structures and offshore platforms.

Manufacturing Excellence

• Controlled Rolling & Cooling (TMCP): Ensures uniform mechanical properties and eliminates preheating for plates ≤30mm

• Heat Treatment: Normalizing or quenching for thickness >50mm to enhance weldability

• Surface Treatment: Shot blasting (SA 2.5 finish) and anti-rust painting for corrosion resistance

Applications

• Shipbuilding: Hulls, decks, bulkheads (AH36); LNG carrier components (EH36); icebreaker vessels (DH36)

• Offshore Engineering: Oil rigs, subsea pipelines (DH36/EH36)

• Infrastructure: Bridges, pressure vessels, and high-rise steel structures

Certifications & Standards

• Classification Societies: ABS, DNV, CCS, LR, BV, NK, KR, RINA, and others

• Testing Protocols:
  • Ultrasonic inspection for internal defects.
  • Charpy V-notch impact tests at specified temperatures
  • CTOD (Crack Tip Opening Displacement) tests for critical applications

Customization & Dimensions

• Thickness: 5–150mm (up to 300mm for special orders)

• Width: Up to 3,900mm (ideal for large hull sections)

• Processing: Flame cutting, laser cutting, and bending (cold/hot)

Welding & Fabrication Guidelines

• Preheating Requirements:
  • Plates >30mm: Preheat to 120–150°C before welding
  • Ambient Temp <5°C: Preheat to 75°C for plates ≤30mm
• Welding Methods: SMAW, SAW, and FCAW with compatible electrodes

Industry Trends & Advantages

• High-Strength Demand: Rising use of 5m-wide plates and 200–300mm thick boards for mega-container ships and polar-class vessels

• Sustainability: Reduced material consumption due to higher strength-to-weight ratios

Why Choose AH36/DH36/EH36?

1. Certified Quality: Globally recognized by 10+ classification societies
2. Extreme Environment Performance: EH36 withstands -40°C, DH36 excels in Arctic condition
3. Cost Efficiency: Thinner plates reduce weight while maintaining strength
4. End-to-End Support: Mill test reports, Z-certification, and custom packaging

Contact us for technical datasheets or tailored solutions.
Built for the harshest seas, trusted by global shipyards.