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Technical Specifications
Product Overview
Metallurgical Characteristics
API 5L X52 is a low-carbon, high-strength steel with a predominantly ferritic-pearlitic microstructure. The controlled chemical composition, particularly the carbon equivalent (CE) ≤ 0.43%, ensures excellent weldability while maintaining the required mechanical properties. The fine-grained microstructure is achieved through controlled rolling and accelerated cooling processes, resulting in optimal strength-toughness balance.
Heat Treatment and Processing
MetalZenith employs thermomechanical controlled processing (TMCP) for API 5L X52 production. The steel undergoes controlled rolling at temperatures between 850-950°C, followed by accelerated cooling to achieve the desired microstructure. Normalizing heat treatment at 900-950°C may be applied for stress relief and grain refinement. Post-weld heat treatment (PWHT) at 580-650°C is recommended for thick-section welded components.
Manufacturing Process Excellence
Our integrated manufacturing process begins with electric arc furnace steelmaking, utilizing advanced ladle metallurgy for precise chemical composition control. Continuous casting ensures homogeneous structure, followed by hot rolling on state-of-the-art mills with computerized process control. Seamless pipes are produced through rotary piercing and pilger rolling, while welded pipes utilize high-frequency induction welding with 100% seam inspection.
Quality Standards and Compliance
MetalZenith's API 5L X52 steel meets stringent international standards including API 5L PSL1 and PSL2 requirements, NACE MR0175 for sour service applications, and various national standards. Our quality management system encompasses statistical process control, real-time monitoring of critical parameters, and comprehensive testing protocols including chemical analysis, mechanical testing, non-destructive examination, and hydrostatic pressure testing to ensure consistent product quality and reliability.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.26 |
| Manganese (Mn) | ≤ 1.40 |
| Silicon (Si) | ≤ 0.45 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.30 |
| Molybdenum (Mo) | ≤ 0.15 |
| Copper (Cu) | ≤ 0.50 |
| Vanadium (V) | ≤ 0.10 |
| Niobium (Nb) | ≤ 0.05 |
| Titanium (Ti) | ≤ 0.04 |
| Aluminum (Al) | ≤ 0.06 |
| Carbon Equivalent (CE) | ≤ 0.43 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (Rt0.5) | 360-530 MPa |
| Tensile Strength (Rm) | 460-760 MPa |
| Elongation (A) | ≥ 22% |
| Yield to Tensile Ratio | ≤ 0.93 |
| Hardness (HB) | 150-250 |
| Impact Energy (CVN at 0°C) | ≥ 27 J |
| Impact Energy (CVN at -20°C) | ≥ 20 J |
| Fatigue Limit (107 cycles) | 180-220 MPa |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Shear Modulus | 80 GPa |
| Compression Strength | 360-530 MPa |
🔬 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 | 13.8 mm²/s |
| Emissivity (oxidized surface) | 0.79 |
| Sound Velocity (longitudinal) | 5900 m/s |
| Bulk Modulus | 160 GPa |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Seamless Pipes, Welded Pipes, Plates, Coils, Sheets |
| Pipe Diameter Range | 6.35-1422 mm (0.25-56 inches) |
| Wall Thickness | 2.11-80 mm (0.083-3.15 inches) |
| Plate Thickness | 6-100 mm |
| Length Range | 5.8-18.3 m (Random or Fixed Length) |
| Manufacturing Standards | API 5L, ASTM A106, ASME B36.10M, EN 10208 |
| End Finish | Plain End, Beveled End, Threaded & Coupled |
| Surface Finish | Black, Galvanized, 3PE Coated, FBE Coated |
| Dimensional Tolerance | ±1% (Diameter), ±12.5% (Wall Thickness) |
| Testing Requirements | Hydrostatic, NDT, Chemical Analysis, Mechanical Testing |
| Certification | Mill Test Certificate, Third Party Inspection |
| Packaging | Bundles, Wooden Cases, Steel Frames |
Let Us Create Success for Your Project
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Our Advantages in Processing API 5L X52
Advanced Controlled Rolling Technology
MetalZenith employs sophisticated controlled rolling and accelerated cooling processes that optimize grain structure and enhance mechanical properties, delivering API 5L X52 steel with superior strength-to-weight ratio and exceptional weldability for critical pipeline applications.
Comprehensive Quality Control Systems
Our integrated quality management system features real-time chemical composition monitoring, automated mechanical testing, and advanced non-destructive examination techniques, ensuring every API 5L X52 product meets stringent API specifications and customer requirements.
Global Supply Chain Excellence
MetalZenith's worldwide distribution network and flexible manufacturing capabilities enable rapid delivery of custom API 5L X52 products in various forms including seamless pipes, welded tubes, and plate materials, with tailored dimensions and surface finishes to meet specific project requirements.
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