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Technical Specifications
Product Overview
Metallurgical Characteristics
AH32 marine steel features a fine-grained ferritic-pearlitic microstructure achieved through controlled rolling and normalizing heat treatment. The steel's composition is optimized with microalloying elements including niobium, vanadium, and titanium to provide grain refinement and precipitation strengthening. This results in excellent strength-to-weight ratio and superior low-temperature toughness essential for marine applications.
Heat Treatment Process
MetalZenith employs a precise normalizing process where AH32 steel is heated to 900-950°C and air-cooled to achieve optimal mechanical properties. Our controlled cooling systems ensure uniform temperature distribution and consistent grain structure throughout the material thickness. Additional stress relief treatments at 580-620°C may be applied for specific applications requiring enhanced dimensional stability.
Manufacturing Excellence
Our state-of-the-art production facilities utilize advanced thermomechanical controlled processing (TMCP) technology. The manufacturing process includes continuous casting, controlled rolling with precise temperature monitoring, and accelerated cooling systems. Real-time quality monitoring ensures consistent chemical composition and mechanical properties. Each production batch undergoes comprehensive testing including tensile testing, impact testing, and ultrasonic examination.
Quality Standards & Compliance
MetalZenith's AH32 marine steel fully complies with international standards including EN 10225, ASTM A131 Grade AH32, and JIS G3136. Our quality management system is certified to ISO 9001:2015 and ISO 14001:2015. All products are manufactured under strict quality control with full traceability from raw materials to finished products. Third-party inspection and testing services are available through accredited laboratories to ensure complete customer satisfaction and regulatory compliance.
🧪 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) | ≥ 315 MPa |
| Tensile Strength (Rm) | 440 - 570 MPa |
| Elongation (A5) | ≥ 22% |
| Impact Energy (KV at 0°C) | ≥ 34 J |
| Impact Energy (KV at -20°C) | ≥ 24 J |
| Brinell Hardness (HB) | 150 - 190 |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (10&sup7; cycles) | 220 MPa |
| Fracture Toughness (KIC) | 150 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 (20-100°C) | 12×10-6/K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity | 0.16 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Thermal Diffusivity | 13.8 mm²/s |
| Curie Temperature | 770°C |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Coils, Cut-to-size pieces |
| Thickness Range | 6 - 150 mm |
| Width Range | 1500 - 4000 mm |
| Length Range | 6000 - 18000 mm |
| Standards | EN 10225, ASTM A131, JIS G3136, GB/T 712 |
| Surface Finish | Hot Rolled, Shot Blasted, Pickled |
| Edge Condition | Mill Edge, Trimmed Edge, Slit Edge |
| Thickness Tolerance | ±0.3 mm (6-40mm), ±0.5 mm (>40mm) |
| Width Tolerance | ±5 mm |
| Length Tolerance | ±10 mm |
| Flatness | ≤5 mm/m |
| Classification Societies | ABS, DNV-GL, LR, BV, CCS, NK, RINA |
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Our Advantages in Processing AH32
Advanced Thermomechanical Processing
MetalZenith employs cutting-edge controlled rolling and normalizing technology with precise temperature control systems, ensuring optimal grain structure and superior mechanical properties in every AH32 steel plate we produce.
Comprehensive Quality Certification
Our AH32 marine steel is certified by all major classification societies including ABS, DNV-GL, and Lloyd's Register, with complete traceability and third-party testing to guarantee compliance with international marine standards.
Custom Marine Solutions
MetalZenith offers extensive customization capabilities for AH32 steel including precise dimensional cutting, surface treatments, and specialized heat treatments to meet specific shipbuilding and offshore application requirements.
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