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Technical Specifications
Product Overview
Metallurgical Characteristics
EN 16Mo3 is a low-alloy chromium-molybdenum steel specifically designed for pressure vessel applications at elevated temperatures. The controlled addition of chromium (0.30-0.60%) and molybdenum (0.25-0.35%) provides excellent creep resistance and thermal stability up to 500°C. The fine-grained ferritic-pearlitic microstructure ensures optimal combination of strength, toughness, and weldability.
Heat Treatment Process
MetalZenith employs controlled normalization at 920-960°C followed by air cooling to achieve optimal grain refinement. Tempering at 680-720°C ensures stress relief and improved toughness. Our computer-controlled furnaces maintain temperature uniformity within ±5°C, ensuring consistent mechanical properties throughout the material cross-section.
Manufacturing Process
Production begins with electric arc furnace melting using carefully selected raw materials. Vacuum degassing removes harmful gases and inclusions, while ladle metallurgy ensures precise chemical composition control. Continuous casting produces high-quality billets, which undergo controlled rolling with precise temperature and deformation parameters to achieve optimal microstructure and mechanical properties.
Quality Standards & Compliance
All EN 16Mo3 products comply with EN 10028-2 standard requirements and are manufactured under ISO 9001:2015 quality management system. PED 2014/68/EU certification ensures suitability for pressure equipment applications. Comprehensive testing includes chemical analysis by optical emission spectroscopy, mechanical testing per EN ISO 6892-1, and Charpy impact testing per EN ISO 148-1. Ultrasonic testing per EN 10160 ensures internal soundness.
Welding Considerations
EN 16Mo3 exhibits excellent weldability with appropriate preheating (150-200°C) and post-weld heat treatment. Recommended welding consumables include matching composition electrodes or wires. Interpass temperature should not exceed 250°C to maintain optimal microstructure. Post-weld heat treatment at 680-720°C is recommended for stress relief and optimal service performance.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Manganese (Mn) | 0.40 - 0.90 |
| Silicon (Si) | ≤ 0.35 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.010 |
| Chromium (Cr) | 0.30 - 0.60 |
| Molybdenum (Mo) | 0.25 - 0.35 |
| Nickel (Ni) | ≤ 0.30 |
| Aluminum (Al) | ≥ 0.020 |
| Nitrogen (N) | ≤ 0.012 |
| Copper (Cu) | ≤ 0.30 |
| Vanadium (V) | ≤ 0.02 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 450 - 600 MPa |
| Yield Strength (Re) | ≥ 275 MPa |
| Elongation (A5) | ≥ 22% |
| Impact Energy (KV) at 20°C | ≥ 40 J |
| Impact Energy (KV) at 0°C | ≥ 27 J |
| Brinell Hardness (HB) | ≤ 190 |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (107 cycles) | 200 MPa |
| Creep Rupture Strength (100,000h at 450°C) | 118 MPa |
| Creep Rupture Strength (100,000h at 500°C) | 78 MPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510°C |
| Thermal Conductivity (20°C) | 42 W/m·K |
| Thermal Conductivity (400°C) | 35 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 11.5×10-6/K |
| Thermal Expansion Coefficient (20-400°C) | 12.8×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.18 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
| Thermal Diffusivity (20°C) | 11.6×10-6 m²/s |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Plates, Sheets, Bars, Forgings, Tubes, Pipes |
| Plate Thickness | 5 - 250 mm |
| Sheet Thickness | 0.5 - 5 mm |
| Bar Diameter | 10 - 300 mm |
| Tube Outer Diameter | 10 - 600 mm |
| Maximum Dimensions | 3000 × 12000 mm |
| Standards | EN 10028-2, ASTM A387 Gr 12, JIS G3103 SBV2 |
| Surface Finish | Hot Rolled, Normalized, Pickled, Shot Blasted |
| Tolerance Class | Class A, Class B, Class C per EN 10029 |
| Heat Treatment | Normalized, Normalized + Tempered |
| Testing | 3.1 Certificate, 3.2 Certificate per EN 10204 |
| Special Requirements | Z-direction testing, HIC testing, PWHT simulation |
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Our Advantages in Processing EN 16Mo3
Advanced Vacuum Degassing Technology
MetalZenith utilizes state-of-the-art vacuum degassing systems during steel production, achieving ultra-low sulfur (≤ 0.010%) and phosphorus (≤ 0.025%) content. This advanced technology ensures superior cleanliness, enhanced weldability, and improved impact toughness in EN 16Mo3 steel.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities provide precise normalization and tempering processes with temperature accuracy of ±5°C. This ensures optimal grain structure, consistent mechanical properties, and excellent creep resistance performance throughout the material cross-section.
Comprehensive Testing & Customization
MetalZenith offers complete customization services including non-standard dimensions, special surface finishes, and application-specific heat treatments. Our in-house testing laboratory provides full material certification with chemical analysis, mechanical testing, and ultrasonic inspection reports.
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