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Technical Specifications
Product Overview
Metallurgical Characteristics
EN S890QL is a fine-grained, quenched and tempered structural steel with exceptional strength properties achieved through controlled thermomechanical processing. The steel features a tempered martensitic microstructure with fine carbide precipitation, providing optimal combination of strength, toughness, and weldability. MetalZenith's advanced alloying strategy incorporates precise amounts of chromium, nickel, and molybdenum to enhance hardenability while maintaining low carbon equivalent for superior weldability.
Heat Treatment Process
MetalZenith employs a sophisticated quenching and tempering process optimized for EN S890QL production. The steel is austenitized at 900-950°C, followed by controlled water quenching to achieve full martensitic transformation. Subsequent tempering at 580-650°C ensures optimal strength-toughness balance while relieving residual stresses. Our computer-controlled heat treatment lines guarantee consistent mechanical properties across all product dimensions.
Manufacturing Excellence
Our integrated steel production facility utilizes electric arc furnace technology with secondary refining processes including ladle furnace treatment and vacuum degassing. Continuous casting ensures homogeneous chemical composition, while controlled rolling in the finishing temperature range refines the austenite grain structure. MetalZenith's quality management system encompasses real-time process monitoring, statistical process control, and comprehensive testing protocols.
Quality Standards & Certifications
EN S890QL production at MetalZenith complies with EN 10025-6 standard requirements and additional customer specifications. Our quality assurance program includes chemical analysis by optical emission spectroscopy, mechanical testing per EN ISO 6892-1, Charpy impact testing at specified temperatures, ultrasonic inspection per EN 10160, and dimensional verification. All products are supplied with comprehensive mill test certificates (3.1 per EN 10204) and traceability documentation.
🧪 Chemical Composition
| Element | Composition (%) | Typical (%) |
|---|---|---|
| Carbon (C) | ≤ 0.20 | 0.15 |
| Manganese (Mn) | ≤ 1.70 | 1.45 |
| Silicon (Si) | ≤ 0.80 | 0.35 |
| Phosphorus (P) | ≤ 0.020 | 0.012 |
| Sulfur (S) | ≤ 0.010 | 0.005 |
| Chromium (Cr) | ≤ 1.50 | 0.85 |
| Nickel (Ni) | ≤ 2.00 | 1.25 |
| Molybdenum (Mo) | ≤ 0.70 | 0.45 |
| Boron (B) | ≤ 0.005 | 0.003 |
| Titanium (Ti) | ≤ 0.05 | 0.025 |
| Vanadium (V) | ≤ 0.12 | 0.08 |
| Niobium (Nb) | ≤ 0.06 | 0.035 |
⚙️ Mechanical Properties
| Property | Value | Test Standard |
|---|---|---|
| Yield Strength (Rp0.2) | ≥ 890 MPa | EN ISO 6892-1 |
| Tensile Strength (Rm) | 940-1100 MPa | EN ISO 6892-1 |
| Elongation (A5) | ≥ 12% | EN ISO 6892-1 |
| Elongation (A80) | ≥ 14% | EN ISO 6892-1 |
| Impact Energy (KV) at -40°C | ≥ 30 J | EN ISO 148-1 |
| Impact Energy (KV) at -60°C | ≥ 27 J | EN ISO 148-1 |
| Hardness (HBW) | 280-350 | EN ISO 6506-1 |
| Young's Modulus | 210 GPa | EN ISO 6892-1 |
| Fatigue Limit (10^7 cycles) | 450 MPa | EN 6072 |
| Fracture Toughness (KIC) | ≥ 100 MPa·m^0.5 | ASTM E399 |
🔬 Physical Properties
| Property | Value | Temperature Range |
|---|---|---|
| Density | 7.85 g/cm³ | 20°C |
| Melting Point | 1450-1520°C | - |
| Thermal Conductivity | 42 W/m·K | 20°C |
| Thermal Expansion Coefficient | 12.5×10-6/K | 20-100°C |
| Specific Heat Capacity | 460 J/kg·K | 20°C |
| Electrical Resistivity | 0.18 µΩ·m | 20°C |
| Magnetic Permeability | Ferromagnetic | 20°C |
| Poisson's Ratio | 0.30 | 20°C |
| Thermal Diffusivity | 11.6 mm²/s | 20°C |
| Curie Temperature | 770°C | - |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Plates, Sheets, Bars, Tubes, Profiles | EN 10025-6 |
| Plate Thickness | 3-100 mm | EN 10029 |
| Sheet Thickness | 0.5-3 mm | EN 10131 |
| Bar Diameter | 10-300 mm | EN 10060 |
| Tube Outer Diameter | 20-500 mm | EN 10210 |
| Width Range | 1000-4000 mm | EN 10025-6 |
| Length Range | 2000-18000 mm | Customer Specified |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted | EN 10163 |
| Dimensional Tolerance | Class A, B, C | EN 10029 |
| Edge Condition | Mill Edge, Cut Edge, Slit Edge | EN 10025-6 |
| Heat Treatment | Quenched and Tempered (Q+T) | EN 10025-6 |
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Our Advantages in Processing EN S890QL
Advanced Quenching & Tempering Technology
MetalZenith employs cutting-edge controlled cooling systems and precision tempering furnaces to achieve optimal microstructure in EN S890QL steel. Our proprietary heat treatment processes ensure consistent mechanical properties and superior grain refinement across all thickness ranges.
Comprehensive Quality Control Systems
Our integrated quality management system includes real-time chemical composition monitoring, automated mechanical testing, and advanced non-destructive testing capabilities. Every product batch is fully traceable with complete mill test certificates and third-party verification available.
Custom Processing & Global Supply Chain
MetalZenith offers extensive value-added services including precision cutting, machining, and surface treatment. Our global distribution network ensures reliable delivery worldwide with flexible packaging options and just-in-time delivery capabilities for project-specific requirements.
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