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Technical Specifications
Product Overview
Metallurgical Characteristics
API 5L X60 steel features a fine-grained ferrite-pearlite microstructure achieved through controlled rolling and accelerated cooling processes. The optimized chemical composition with microalloying elements such as niobium and vanadium provides excellent strength-toughness balance and superior weldability. The steel exhibits excellent resistance to hydrogen-induced cracking (HIC) and sulfide stress cracking (SSC) in sour service environments.
Manufacturing Process
MetalZenith produces API 5L X60 steel through advanced steelmaking processes including electric arc furnace (EAF) melting, ladle refining, and continuous casting. The hot rolling process utilizes thermomechanical controlled processing (TMCP) with precise temperature control during rolling and accelerated cooling to achieve optimal mechanical properties. Seamless pipes are manufactured using rotary piercing and pilger rolling, while welded pipes employ high-frequency electric resistance welding (HFW) or submerged arc welding (SAW).
Heat Treatment & Processing
The steel is typically supplied in the as-rolled or normalized condition, depending on specific requirements. Stress relieving heat treatment at 580-650°C may be applied to reduce residual stresses. For specialized applications, quenching and tempering processes can be employed to achieve enhanced mechanical properties. Post-weld heat treatment (PWHT) guidelines are provided for field welding operations.
Quality Standards & Testing
All API 5L X60 steel products undergo comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical testing per ASTM A370, non-destructive testing (ultrasonic, magnetic particle, dye penetrant), dimensional inspection, and hydrostatic pressure testing. Products are certified to API 5L PSL1 and PSL2 requirements, with full material traceability and third-party inspection available. Advanced testing capabilities include CTOD fracture toughness testing, fatigue testing, and corrosion resistance evaluation.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.28 |
| 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 |
| Carbon Equivalent (CE) | ≤ 0.43 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (Rt0.5) | 415-565 MPa |
| Tensile Strength (Rm) | 520-760 MPa |
| Elongation (A) | ≥ 18% |
| Yield to Tensile Ratio | ≤ 0.93 |
| Hardness (HRC) | 22-28 |
| Impact Energy (CVN at 0°C) | ≥ 27 J |
| Impact Energy (CVN at -20°C) | ≥ 20 J |
| Fatigue Limit (10&sup7; cycles) | 180-220 MPa |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Shear Modulus | 80 GPa |
🔬 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 | Seamless Pipes, Welded Pipes, Plates, Coils |
| Pipe Diameter Range | 6.35-1422 mm (1/4"-56") |
| Wall Thickness | 2.11-80 mm |
| Plate Thickness | 6-100 mm |
| Length Range | 5.8-18.3 m (Random/Fixed) |
| Manufacturing Standards | API 5L, ISO 3183, ASTM A1018, EN 10208 |
| End Finish | Plain End, Beveled End |
| Surface Finish | Black, Varnished, 3PE Coated, FBE Coated |
| Testing Requirements | Hydrostatic, NDT, Chemical Analysis, Mechanical Testing |
| Dimensional Tolerance | ±1% (Diameter), ±12.5% (Wall Thickness) |
| Delivery Condition | As-Rolled, Normalized, TMCP |
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Our Advantages in Processing API 5L X60
Advanced TMCP Manufacturing 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 our API 5L X60 steel production.
Comprehensive Quality Control Systems
Our integrated quality management system includes real-time chemical composition monitoring, automated mechanical testing, advanced NDT inspection, and full dimensional verification, guaranteeing consistent API 5L X60 steel quality that exceeds international standards.
Global Supply Chain & Custom Solutions
MetalZenith offers flexible customization options for API 5L X60 steel including specialized dimensions, surface treatments, and delivery schedules, supported by our worldwide distribution network and technical engineering services for project-specific requirements.
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