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Technical Specifications
Product Overview
Metallurgical Characteristics
FH32 offshore steel features a fine-grained ferrite-pearlite microstructure achieved through controlled thermomechanical processing. The addition of microalloying elements such as niobium, vanadium, and titanium provides grain refinement and precipitation strengthening, resulting in excellent strength-toughness combination at low temperatures.
Heat Treatment Process
MetalZenith employs advanced controlled rolling followed by accelerated cooling (TMCP) to achieve optimal mechanical properties. The process involves:
- Reheating to 1200-1250°C for austenite homogenization
- Controlled rolling in the temperature range of 1050-850°C
- Accelerated cooling to 500-600°C at controlled rates
- Air cooling to ambient temperature
Manufacturing Process Excellence
Our state-of-the-art production facility utilizes electric arc furnace steelmaking with secondary refining including ladle furnace treatment and vacuum degassing. This ensures ultra-low sulfur and phosphorus content, superior cleanliness, and consistent chemical composition throughout the heat.
Quality Standards & Testing
Every batch of FH32 steel undergoes comprehensive testing including chemical analysis, tensile testing, Charpy V-notch impact testing at specified temperatures, hardness testing, and ultrasonic inspection. Material certificates include complete traceability from raw materials to finished products, ensuring compliance with international offshore standards and customer specifications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.18 |
| Manganese (Mn) | 0.90 - 1.60 |
| Silicon (Si) | 0.10 - 0.50 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Aluminum (Al) | ≥ 0.015 |
| Niobium (Nb) | 0.02 - 0.05 |
| Vanadium (V) | 0.05 - 0.10 |
| Titanium (Ti) | 0.02 - 0.05 |
| Nickel (Ni) | ≤ 0.40 |
| Chromium (Cr) | ≤ 0.20 |
| Molybdenum (Mo) | ≤ 0.08 |
| Copper (Cu) | ≤ 0.35 |
| Nitrogen (N) | ≤ 0.012 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (ReH) | 315 - 440 MPa |
| Tensile Strength (Rm) | 440 - 590 MPa |
| Elongation (A5) | ≥ 22% |
| Impact Energy (KV) at -40°C | ≥ 34 J |
| Impact Energy (KV) at -60°C | ≥ 27 J |
| Brinell Hardness (HB) | 150 - 230 |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (107 cycles) | 220 MPa |
| Fracture Toughness (K1C) | ≥ 150 MPa·m1/2 |
| Reduction of Area | ≥ 50% |
🔬 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 | Details |
|---|---|
| Available Forms | Plates, Sheets, Bars, Sections, Forgings |
| Plate Thickness Range | 6 - 150 mm |
| Sheet Thickness Range | 1.5 - 6 mm |
| Maximum Plate Dimensions | 4000 × 15000 mm |
| Standards Compliance | EN 10225, DNV GL, ABS, LR, BV |
| Surface Finish | Hot Rolled, Normalized, Shot Blasted |
| Edge Condition | Mill Edge, Sheared, Flame Cut, Machined |
| Dimensional Tolerance | ±0.5mm thickness, ±5mm width/length |
| Flatness Tolerance | ≤ 5mm/m |
| Impact Test Temperature | -40°C, -60°C (as required) |
| Ultrasonic Testing | Class S1, S2, S3 available |
| Delivery Condition | Normalized (N), TMCP |
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Our Advantages in Processing FH32
Advanced Thermomechanical Processing
MetalZenith utilizes cutting-edge controlled rolling and accelerated cooling technology to achieve superior grain refinement and enhanced low-temperature toughness in FH32 steel, ensuring exceptional performance in arctic conditions down to -40°C.
Comprehensive Quality Control System
Our integrated quality management system includes real-time chemical analysis, mechanical testing at sub-zero temperatures, ultrasonic inspection, and complete material traceability, ensuring every batch of FH32 steel meets stringent offshore standards.
Custom Engineering Solutions
MetalZenith provides tailored FH32 steel solutions with custom dimensions, surface treatments, and mechanical properties to meet specific project requirements, backed by technical support and global logistics capabilities for timely delivery worldwide.
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