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Technical Specifications
Product Overview
Metallurgical Characteristics
EN L485 is a microalloyed steel featuring a fine-grained ferrite-pearlite microstructure achieved through controlled rolling and accelerated cooling. The addition of niobium and vanadium provides precipitation strengthening and grain refinement, resulting in excellent strength-toughness combination. The low carbon equivalent (CE ≤ 0.43%) ensures superior weldability without preheating requirements.
Manufacturing Process
MetalZenith employs advanced Thermomechanical Controlled Processing (TMCP) technology, combining controlled rolling in the austenite recrystallization and non-recrystallization regions followed by accelerated cooling. This process optimizes the austenite-to-ferrite transformation, achieving fine grain sizes (ASTM 10-12) and uniform mechanical properties. Our continuous casting and hot rolling facilities ensure consistent chemical composition and microstructural homogeneity.
Heat Treatment Options
Standard delivery condition is normalized or TMCP. Optional heat treatments include stress relieving at 580-650°C for improved dimensional stability, and quenching and tempering for enhanced strength properties. Post-weld heat treatment (PWHT) at 580-620°C may be applied for stress relief in welded constructions.
Quality Standards & Testing
MetalZenith's EN L485 production adheres to stringent quality control protocols including 100% ultrasonic testing for internal soundness, mechanical testing per EN 10002-1, and Charpy V-notch impact testing at specified temperatures. Chemical analysis is performed using optical emission spectroscopy with ±0.005% accuracy. All products are supplied with EN 10204 Type 3.1 mill test certificates and optional third-party inspection.
Welding Considerations
EN L485 exhibits excellent weldability with low carbon equivalent and controlled sulfur content. Recommended welding processes include SMAW, GMAW, SAW, and FCAW. Preheat temperature requirements are minimal (typically 50-100°C) depending on thickness and ambient conditions. Post-weld heat treatment may be specified for critical applications to optimize HAZ properties.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.18 |
| Manganese (Mn) | 1.40 - 1.65 |
| Silicon (Si) | 0.15 - 0.45 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.30 |
| Molybdenum (Mo) | ≤ 0.15 |
| Copper (Cu) | ≤ 0.35 |
| Niobium (Nb) | 0.02 - 0.05 |
| Vanadium (V) | ≤ 0.06 |
| Titanium (Ti) | ≤ 0.04 |
| Aluminum (Al) | ≥ 0.015 |
| Nitrogen (N) | ≤ 0.012 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (Rp0.2) | 485 - 635 MPa |
| Tensile Strength (Rm) | 570 - 760 MPa |
| Elongation (A) | ≥ 18% |
| Yield to Tensile Ratio | ≤ 0.93 |
| Charpy V-notch Impact Energy (0°C) | ≥ 40 J |
| Charpy V-notch Impact Energy (-20°C) | ≥ 27 J |
| Charpy V-notch Impact Energy (-40°C) | ≥ 20 J |
| Hardness (HV10) | 200 - 280 |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (107 cycles) | 240 MPa |
| Fracture Toughness (KIC) | 150 - 200 MPa·m1/2 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510 - 1540°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 |
| Coefficient of Linear Expansion (0-100°C) | 11.5×10-6/K |
| Emissivity (oxidized surface) | 0.85 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Pipes, Tubes, Bars, Coils |
| Plate Thickness Range | 6 - 100 mm |
| Sheet Thickness Range | 2 - 6 mm |
| Pipe Diameter Range | 168.3 - 1422 mm |
| Pipe Wall Thickness | 6 - 40 mm |
| Standard Widths | 1500, 2000, 2500, 3000 mm |
| Standard Lengths | 6000, 9000, 12000 mm |
| Surface Finish | Hot Rolled, Normalized, Shot Blasted |
| Dimensional Tolerance | ±0.5% (thickness), ±5mm (width/length) |
| Applicable Standards | EN 10208-2, API 5L, ISO 3183, ASTM A333 |
| Delivery Condition | Normalized, TMCP, Quenched & Tempered |
| Edge Condition | Mill Edge, Slit Edge, Flame Cut |
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Our Advantages in Processing EN L485
Advanced TMCP Technology
MetalZenith employs cutting-edge Thermomechanical Controlled Processing (TMCP) with precise temperature control and accelerated cooling systems, ensuring optimal microstructure refinement and superior mechanical properties in EN L485 steel production.
Comprehensive Quality Control
Our state-of-the-art testing facilities include automated ultrasonic inspection, Charpy V-notch impact testing at -40°C, and real-time chemical analysis systems, guaranteeing consistent quality and compliance with international pipeline standards.
Custom Processing Capabilities
MetalZenith offers extensive customization options including specialized heat treatments, precise dimensional tolerances, and tailored mechanical properties to meet specific project requirements and operating conditions.
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