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Technical Specifications
Product Overview
Metallurgical Characteristics
EH36 marine steel features a fine-grained ferritic-pearlitic microstructure achieved through controlled rolling and normalizing heat treatment. The steel's composition includes microalloying elements such as niobium, vanadium, and titanium, which provide grain refinement and precipitation strengthening. This results in an optimal combination of high strength, excellent toughness, and superior weldability essential for marine structural applications.
Heat Treatment Process
MetalZenith employs a carefully controlled normalizing process where EH36 steel is heated to 900-950°C, held at temperature for uniform austenite formation, then air-cooled to achieve the desired microstructure. This heat treatment ensures consistent mechanical properties throughout the material thickness and eliminates residual stresses from hot rolling. Optional stress relief annealing at 580-650°C may be applied for specific applications requiring dimensional stability.
Manufacturing Process Excellence
Our integrated steelmaking process begins with electric arc furnace melting using premium scrap and direct reduced iron. Secondary refining through ladle metallurgy stations ensures precise chemistry control and inclusion modification. The steel undergoes continuous casting followed by thermomechanical controlled processing (TMCP) with computer-controlled rolling schedules to optimize grain structure and mechanical properties. Advanced ultrasonic testing and automated inspection systems ensure defect-free material delivery.
Quality Standards and Certification
MetalZenith's EH36 steel production adheres to the highest international quality standards including ISO 9001:2015, ISO 14001:2015, and OHSAS 18001. Our quality management system encompasses full material traceability, comprehensive mechanical and chemical testing, non-destructive examination, and third-party verification by major classification societies. Each shipment includes certified mill test certificates with complete test results and compliance documentation for marine industry requirements.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.18 |
| Manganese (Mn) | 0.90 - 1.60 |
| Silicon (Si) | 0.10 - 0.50 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Aluminum (Al) | ≥ 0.015 |
| Niobium (Nb) | 0.02 - 0.05 |
| Vanadium (V) | 0.05 - 0.10 |
| Titanium (Ti) | 0.02 - 0.05 |
| Copper (Cu) | ≤ 0.35 |
| Chromium (Cr) | ≤ 0.20 |
| Nickel (Ni) | ≤ 0.40 |
| Molybdenum (Mo) | ≤ 0.08 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (ReH) | ≥ 355 MPa |
| Tensile Strength (Rm) | 490 - 630 MPa |
| Elongation (A5) | ≥ 22% |
| Impact Energy (KV at 0°C) | ≥ 34 J |
| Impact Energy (KV at -20°C) | ≥ 24 J |
| Impact Energy (KV at -40°C) | ≥ 24 J |
| Brinell Hardness (HB) | 150 - 220 |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (107 cycles) | 180 MPa |
| Fracture Toughness (K1C) | 120 MPa·m1/2 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510°C |
| Thermal Conductivity (20°C) | 54 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12×10-6/K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity (20°C) | 0.16 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
| Thermal Diffusivity | 13.7 mm²/s |
| Emissivity (oxidized surface) | 0.79 |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Plates, Sheets, Bars, Sections, Forgings |
| Plate Thickness | 6 - 150 mm |
| Sheet Thickness | 1.5 - 6 mm |
| Width Range | 1000 - 4000 mm |
| Length Range | 2000 - 18000 mm |
| Standards | ABS, DNV-GL, LR, BV, CCS, NK, RINA |
| Surface Finish | Hot Rolled, Normalized, Shot Blasted |
| Edge Condition | Mill Edge, Sheared Edge, Flame Cut |
| Thickness Tolerance | ± 0.3 mm (t ≤ 40mm), ± 0.05t (t > 40mm) |
| Width Tolerance | ± 10 mm |
| Length Tolerance | ± 25 mm |
| Flatness | ≤ 5 mm/m |
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Our Advantages in Processing EH36
Advanced Controlled Rolling Technology
MetalZenith employs precision-controlled thermomechanical rolling processes with real-time temperature monitoring and computer-controlled deformation schedules. This advanced technology ensures optimal grain refinement and uniform mechanical properties throughout the EH36 steel, delivering superior strength-to-weight ratios and enhanced toughness for marine applications.
Comprehensive Marine Certification Program
Our EH36 steel undergoes rigorous testing protocols including Charpy V-notch impact testing at sub-zero temperatures, ultrasonic inspection, and third-party verification by major classification societies. MetalZenith maintains certifications from ABS, DNV-GL, Lloyd's Register, and other leading marine authorities, ensuring full compliance with international shipbuilding standards.
Flexible Supply Chain and Custom Processing
MetalZenith offers comprehensive supply chain solutions with strategic inventory management, just-in-time delivery, and custom processing services including cutting, machining, and heat treatment. Our global distribution network and flexible production scheduling ensure reliable supply of EH36 steel in various forms and specifications to meet specific project requirements.
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