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 L245 pipeline steel features a fine-grained ferrite-pearlite microstructure achieved through controlled rolling and accelerated cooling processes. The low carbon content (≤ 0.28%) ensures excellent weldability while maintaining adequate strength levels. Microalloying elements such as vanadium and niobium provide grain refinement and precipitation strengthening, enhancing both strength and toughness properties.
Heat Treatment & Processing
MetalZenith employs thermomechanical controlled processing (TMCP) for GB L245 production, involving controlled rolling in the austenite recrystallization and non-recrystallization regions followed by accelerated cooling. This process eliminates the need for subsequent heat treatment while achieving superior mechanical properties. Normalizing at 900-950°C may be applied for stress relief when required.
Manufacturing Process Excellence
Our integrated steel production facility utilizes electric arc furnace steelmaking with ladle refining and vacuum degassing to achieve precise chemical composition control. Continuous casting ensures uniform solidification and minimal segregation. Hot rolling is performed using computer-controlled rolling mills with precise temperature and deformation control to optimize microstructure development.
Quality Standards & Certifications
All GB L245 products manufactured by MetalZenith comply with GB/T 9711, API 5L PSL1/PSL2, and EN 10208 standards. Our quality management system is certified to ISO 9001:2015, ISO 14001:2015, and OHSAS 18001. Each product batch includes comprehensive mill test certificates with full traceability documentation, chemical analysis reports, and mechanical property verification results.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.28 |
| Manganese (Mn) | ≤ 1.20 |
| Silicon (Si) | ≤ 0.40 |
| 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) | ≤ 0.06 |
| Niobium (Nb) | ≤ 0.05 |
| Titanium (Ti) | ≤ 0.04 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (Rp0.2) | 245-450 MPa |
| Tensile Strength (Rm) | 415-565 MPa |
| Elongation (A) | ≥ 22% |
| Yield to Tensile Ratio | ≤ 0.93 |
| Hardness (HB) | 120-180 |
| Impact Energy (KV2) at 0°C | ≥ 27 J |
| Impact Energy (KV2) at -20°C | ≥ 20 J |
| Fatigue Limit (10^7 cycles) | 180-220 MPa |
| Modulus of Elasticity | 210 GPa |
| Poisson's Ratio | 0.27-0.30 |
| 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 mm²/s |
| Emissivity (oxidized surface) | 0.79 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Seamless Pipes, Welded Pipes, Plates, Sheets, Coils, Bars |
| Pipe Diameter Range | 21.3mm - 1422mm (0.84' - 56') |
| Wall Thickness | 2.0mm - 80mm |
| Plate Thickness | 6mm - 200mm |
| Width Range | 1000mm - 4000mm |
| Length Range | 6000mm - 18000mm |
| Standards Compliance | GB/T 9711, API 5L, EN 10208, ISO 3183 |
| Surface Finish | Black, Pickled, Oiled, Galvanized, Epoxy Coated |
| End Preparation | Plain End, Beveled End, Threaded |
| Dimensional Tolerance | ±0.5% (Diameter), ±10% (Wall Thickness) |
| Testing Requirements | Hydrostatic Test, NDT, Chemical Analysis, Mechanical Testing |
Let Us Create Success for Your Project
Professional Team, Premium Products, Complete Service - Your Project Success is Our Mission
Our Advantages in Processing GB L245
Advanced Thermomechanical Processing
MetalZenith utilizes cutting-edge controlled rolling and accelerated cooling technologies to achieve optimal grain refinement and enhanced mechanical properties in GB L245 steel, ensuring superior toughness and uniform microstructure throughout the material thickness.
Comprehensive Quality Control System
Our integrated quality management system features real-time chemical composition monitoring, automated mechanical testing, and advanced non-destructive inspection techniques including ultrasonic testing and magnetic particle inspection to guarantee consistent product quality and reliability.
Flexible Customization & Global Supply
MetalZenith offers extensive customization capabilities including specialized heat treatments, precision machining, and custom dimensions. Our global logistics network ensures timely delivery worldwide with comprehensive technical support and engineering consultation services.
YOUR TRUSTED STEEL
MANUFACTURING PARTNER
Quick Inquiry
Industries We Serve
Professional steel solutions across major industries
Qualifications & Certifications
