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Technical Specifications
Product Overview
Metallurgical Characteristics
EN P235GH is a fine-grained, non-alloy structural steel with excellent weldability and formability characteristics. The steel exhibits a ferritic-pearlitic microstructure with controlled grain size achieved through aluminum deoxidation and normalized heat treatment. The low carbon content (≤ 0.16%) ensures superior weldability without preheating requirements for most applications.
Heat Treatment Process
MetalZenith employs controlled normalizing heat treatment at 880-920°C followed by air cooling to achieve optimal mechanical properties. This process refines the grain structure, improves toughness, and ensures uniform properties throughout the material cross-section. Stress relief annealing at 580-650°C may be applied for enhanced dimensional stability.
Manufacturing Process Excellence
Our production process begins with carefully selected raw materials processed in electric arc furnaces with secondary refining through ladle metallurgy. Continuous casting ensures homogeneous chemical composition, while controlled rolling parameters optimize the final microstructure. Advanced cooling strategies and precise temperature control throughout processing guarantee consistent mechanical properties.
Quality Standards & Certifications
Every batch of EN P235GH steel undergoes comprehensive testing including chemical analysis by optical emission spectrometry, tensile testing, Charpy V-notch impact testing, and ultrasonic inspection. MetalZenith maintains certifications to ISO 9001:2015, PED 2014/68/EU, and ASME Boiler and Pressure Vessel Code, ensuring compliance with international pressure equipment standards.
Welding & Fabrication Guidelines
EN P235GH exhibits excellent weldability with all conventional welding processes including SMAW, GMAW, GTAW, and SAW. No preheating is typically required for sections up to 30mm thickness. Post-weld heat treatment at 580-650°C is recommended for pressure vessel applications to relieve residual stresses and optimize service performance.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.16 |
| Manganese (Mn) | 0.40 - 1.20 |
| Silicon (Si) | ≤ 0.35 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.010 |
| Aluminum (Al) | ≥ 0.020 |
| Nitrogen (N) | ≤ 0.012 |
| Copper (Cu) | ≤ 0.30 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.30 |
| Molybdenum (Mo) | ≤ 0.08 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (ReH) | 235 - 400 MPa |
| Tensile Strength (Rm) | 360 - 500 MPa |
| Elongation (A) | ≥ 25% |
| Impact Energy (KV) at 20°C | ≥ 27 J |
| Impact Energy (KV) at 0°C | ≥ 27 J |
| Brinell Hardness (HB) | 105 - 150 |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (107 cycles) | 180 MPa |
| Reduction of Area | ≥ 38% |
🔬 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 |
| Maximum Service Temperature | 300°C |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Bars, Forgings, Tubes |
| Plate Thickness Range | 5 - 250 mm |
| Sheet Thickness Range | 0.5 - 5 mm |
| Bar Diameter Range | 10 - 300 mm |
| Maximum Plate Dimensions | 4000 × 15000 mm |
| Standards Compliance | EN 10028-2, PED 2014/68/EU, ASME VIII |
| Surface Finish | Hot Rolled, Normalized, Shot Blasted |
| Dimensional Tolerance | ±0.1 mm (thickness), ±2 mm (width/length) |
| Edge Condition | Mill Edge, Slit Edge, Flame Cut |
| Delivery Condition | Normalized (+N), As Rolled (+AR) |
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Our Advantages in Processing EN P235GH
Advanced Metallurgical Control
MetalZenith employs cutting-edge vacuum degassing technology and controlled atmosphere furnaces to achieve precise chemical composition control, ensuring superior grain refinement and enhanced mechanical properties in our EN P235GH steel production.
Comprehensive Quality Testing
Our state-of-the-art testing laboratory conducts full material characterization including ultrasonic inspection, impact testing at sub-zero temperatures, and advanced metallographic analysis to guarantee compliance with EN 10028-2 standards.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision cutting, heat treatment services, and surface finishing options, backed by our global distribution network ensuring timely delivery of EN P235GH steel worldwide.
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