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Technical Specifications
Product Overview
Metallurgical Structure & Heat Treatment
NM500 HiTuf features a fine-grained martensitic microstructure achieved through MetalZenith's proprietary controlled rolling and direct quenching process. The steel undergoes precise austenitization at 900-950°C followed by accelerated cooling to achieve optimal hardness distribution. Subsequent tempering at 150-200°C relieves internal stresses while maintaining hardness levels. The resulting microstructure consists of tempered martensite with fine carbide precipitates, providing exceptional wear resistance and toughness balance.
Advanced Manufacturing Process
MetalZenith employs state-of-the-art electric arc furnace technology with secondary refining through ladle furnace and vacuum degassing processes. The steel is continuously cast into slabs and processed through our advanced thermomechanical controlled processing (TMCP) line. Real-time monitoring systems control rolling temperatures, reduction ratios, and cooling rates to ensure consistent mechanical properties. Our direct quenching technology eliminates reheating, reducing energy consumption and improving dimensional stability.
Quality Standards & Certifications
All NM500 HiTuf products are manufactured in accordance with ISO 9001:2015 quality management systems and comply with international standards including EN 10025, ASTM A514, and JIS G3106. MetalZenith maintains certifications from major classification societies including Lloyd's Register, DNV GL, and ABS. Our quality control laboratory is accredited to ISO/IEC 17025 standards, ensuring accurate and reliable testing results. Each delivery includes comprehensive mill test certificates with chemical analysis, mechanical properties, and dimensional inspection reports.
Welding & Fabrication Guidelines
NM500 HiTuf exhibits excellent weldability with proper preheating and post-weld heat treatment procedures. Recommended preheating temperature is 150-200°C for thicknesses above 20mm. Low hydrogen welding processes such as GMAW, GTAW, and SMAW with basic electrodes are preferred. Interpass temperature should not exceed 250°C to prevent softening of the heat-affected zone. Post-weld stress relief at 580-620°C may be required for critical applications to restore optimal mechanical properties.
🧪 Chemical Composition
| Element | Content (%) | Specification |
|---|---|---|
| Carbon (C) | ≤ 0.27 | Controlled for weldability |
| Manganese (Mn) | 1.00 - 1.60 | Hardenability enhancement |
| Silicon (Si) | 0.10 - 0.70 | Deoxidation and strength |
| Phosphorus (P) | ≤ 0.025 | Controlled impurity |
| Sulfur (S) | ≤ 0.010 | Controlled impurity |
| Chromium (Cr) | 0.20 - 1.50 | Wear resistance |
| Nickel (Ni) | ≤ 2.50 | Toughness improvement |
| Molybdenum (Mo) | ≤ 1.00 | Hardenability |
| Boron (B) | ≤ 0.005 | Hardenability booster |
| Titanium (Ti) | ≤ 0.150 | Grain refinement |
⚙️ Mechanical Properties
| Property | Value | Test Standard |
|---|---|---|
| Hardness (Brinell) | 500 ± 30 HBW | EN ISO 6506-1 |
| Tensile Strength | 1400 - 1650 MPa | EN ISO 6892-1 |
| Yield Strength (0.2%) | ≥ 1100 MPa | EN ISO 6892-1 |
| Elongation (A5) | ≥ 10% | EN ISO 6892-1 |
| Impact Energy (-40°C) | ≥ 27 J | EN ISO 148-1 |
| Impact Energy (-20°C) | ≥ 35 J | EN ISO 148-1 |
| Fatigue Limit (2×106 cycles) | 420 MPa | ASTM D7791 |
| Young's Modulus | 210 GPa | ASTM E111 |
| Poisson's Ratio | 0.27 - 0.30 | ASTM E132 |
| Shear Modulus | 81 GPa | ASTM E143 |
🔬 Physical Properties
| Property | Value | Temperature Range |
|---|---|---|
| Density | 7.85 g/cm³ | 20°C |
| Melting Point | 1420 - 1460°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 |
| Curie Temperature | 770°C | - |
| Thermal Diffusivity | 11.6 mm²/s | 20°C |
| Coefficient of Thermal Expansion | 13.1×10-6/K | 20-200°C |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Plates, Sheets, Cut-to-size pieces | EN 10029, ASTM A6 |
| Thickness Range | 4 - 80 mm | Standard tolerance |
| Width Range | 1000 - 3200 mm | EN 10029 Class A |
| Length Range | 2000 - 12000 mm | EN 10029 Class A |
| Surface Finish | As-rolled, Shot-blasted, Pickled | EN 10163-2 |
| Edge Condition | Mill edge, Sheared edge, Flame cut | EN 10029 |
| Flatness Tolerance | ≤ 5 mm/m | EN 10029 Class N |
| Thickness Tolerance | ± 0.3 mm (t ≤ 20mm) | EN 10029 Class A |
| Delivery Condition | Quenched and Tempered | EN 10204 3.1 |
| Marking | Steel grade, Heat number, Thickness | Customer specification |
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Our Advantages in Processing NM500 HiTuf
Advanced Thermomechanical Processing Technology
MetalZenith employs cutting-edge controlled rolling and direct quenching technology with precise temperature control systems. Our proprietary multi-stage heat treatment process ensures uniform hardness distribution and optimal grain structure, delivering consistent 500 HBW hardness with exceptional toughness throughout the entire plate thickness.
Comprehensive Quality Control & Testing Systems
Our state-of-the-art quality control laboratory features advanced spectroscopic analysis, automated hardness testing systems, and ultrasonic inspection equipment. Every NM500 HiTuf plate undergoes 100% inspection with real-time monitoring of chemical composition, mechanical properties, and dimensional accuracy, ensuring zero-defect delivery to customers.
Custom Processing & Global Supply Chain Excellence
MetalZenith offers comprehensive value-added services including precision cutting, machining, forming, and welding preparation. Our global distribution network with strategically located warehouses ensures rapid delivery worldwide. We provide customized solutions with flexible sizing, special surface treatments, and application-specific modifications to meet unique customer requirements.
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