20 Years Experience | 1000+ Brand Partners | Full Customization
We have 20 years of industry experience, have partnered with over 1,000 brands, and support any customization needs.
Technical Specifications
Product Overview
Metallurgical Characteristics
GB L360 is a high-strength low-alloy (HSLA) steel with a predominantly ferritic-pearlitic microstructure, enhanced through controlled rolling and accelerated cooling processes. The steel achieves its superior mechanical properties through grain refinement and precipitation strengthening mechanisms, utilizing microalloying elements such as vanadium, niobium, and titanium.
Manufacturing Process
MetalZenith produces GB L360 steel through an integrated steelmaking route involving electric arc furnace melting, ladle refining, continuous casting, and controlled thermomechanical processing. The controlled rolling process involves precise temperature control during hot deformation, followed by accelerated cooling to achieve optimal microstructural refinement and mechanical property enhancement.
Heat Treatment and Processing
GB L360 steel is typically supplied in the as-rolled condition, with controlled cooling from the rolling temperature providing the required mechanical properties. Normalizing heat treatment at 900-950°C may be applied for stress relief and microstructural homogenization. Welding preheating is generally not required due to the low carbon equivalent, though post-weld heat treatment may be specified for critical applications.
Quality Standards and Testing
All GB L360 steel products manufactured by MetalZenith comply with GB/T 9711 national standards and API 5L international specifications. Comprehensive quality control includes chemical composition verification, tensile testing, Charpy V-notch impact testing, hardness measurement, and non-destructive examination including ultrasonic testing and magnetic particle inspection.
Weldability and Fabrication
GB L360 steel exhibits excellent weldability due to its controlled chemical composition and low carbon equivalent. The steel can be welded using conventional arc welding processes including SMAW, GMAW, GTAW, and SAW. Proper welding procedures and qualified welders ensure joint integrity and mechanical property matching in pipeline construction applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.24 |
| Manganese (Mn) | 1.00 - 1.45 |
| Silicon (Si) | ≤ 0.45 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.30 |
| Molybdenum (Mo) | ≤ 0.15 |
| Copper (Cu) | ≤ 0.50 |
| Vanadium (V) | ≤ 0.06 |
| 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 |
| Charpy V-Notch Impact Energy (0°C) | ≥ 27 J |
| Charpy V-Notch Impact Energy (-10°C) | ≥ 40 J |
| Hardness (HV10) | ≤ 250 |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.27 - 0.30 |
| Fatigue Limit (10^7 cycles) | 180 - 220 MPa |
| Fracture Toughness (KIC) | 150 - 200 MPa·m^0.5 |
| Shear Modulus | 80 GPa |
🔬 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 | 13.7×10-6 m²/s |
| Emissivity (oxidized surface) | 0.79 |
| Thermal Expansion (20-200°C) | 13×10-6/K |
| Thermal Expansion (20-400°C) | 14×10-6/K |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Seamless Pipes, Welded Pipes, Plates, Sheets, Coils, Bars |
| Pipe Diameter Range | 21.3 - 1422 mm (0.84 - 56 inches) |
| Wall Thickness Range | 2.0 - 80 mm (0.08 - 3.15 inches) |
| Plate Thickness Range | 6 - 150 mm (0.24 - 5.91 inches) |
| Standard Lengths | 5.8 - 18 m (Random Length, Fixed Length, Double Random Length) |
| Manufacturing Standards | GB/T 9711, API 5L, ISO 3183, EN 10208 |
| Surface Finish | Black, Varnished, 3PE Coated, FBE Coated, Galvanized |
| End Finish | Plain End, Beveled End, Threaded & Coupled |
| Dimensional Tolerance | ±1% for OD, ±10% for WT (API 5L standards) |
| Testing Requirements | Hydrostatic Test, NDT, Chemical Analysis, Mechanical Testing |
| Certification | Mill Test Certificate, Third Party Inspection Available |
| Packaging | Bundled, Wooden Cases, Steel Frames, Export Packaging |
Let Us Create Success for Your Project
Professional Team, Premium Products, Complete Service - Your Project Success is Our Mission
Our Advantages in Processing GB L360
Advanced Controlled Rolling Technology
MetalZenith utilizes precision controlled rolling and accelerated cooling processes to achieve optimal grain refinement and mechanical properties in GB L360 steel, ensuring superior strength, toughness, and weldability compared to conventional hot-rolled products.
Comprehensive Quality Control System
Our integrated quality management system includes real-time chemical analysis, automated mechanical testing, ultrasonic inspection, and dimensional verification at every production stage, guaranteeing consistent GB L360 steel properties and full traceability documentation.
Global Supply Chain Excellence
MetalZenith offers flexible customization options for GB L360 steel including various product forms, dimensions, and surface finishes, supported by our worldwide distribution network and technical support services for seamless project execution.
YOUR TRUSTED STEEL
MANUFACTURING PARTNER
Quick Inquiry
Industries We Serve
Professional steel solutions across major industries
Qualifications & Certifications
