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Technical Specifications
Product Overview
Metallurgical Structure & Heat Treatment
NM500 exhibits a fine-grained martensitic microstructure achieved through controlled quenching and tempering processes. MetalZenith's advanced heat treatment technology ensures uniform austenitization at 900-950°C followed by controlled water quenching to achieve complete martensitic transformation. The subsequent tempering process at 150-250°C optimizes the balance between hardness and toughness while maintaining excellent wear resistance properties.
Manufacturing Process Excellence
MetalZenith employs electric arc furnace steelmaking with secondary refining processes including ladle furnace treatment and vacuum degassing to achieve superior cleanliness and chemical homogeneity. The continuous casting process ensures consistent internal structure, while controlled rolling and accelerated cooling technology optimize grain refinement and mechanical properties throughout the plate thickness.
Weldability & Fabrication Guidelines
NM500 demonstrates excellent weldability when proper procedures are followed. Preheating to 150-200°C is recommended for sections thicker than 20mm. Low hydrogen electrodes (E7018 or equivalent) should be used with interpass temperatures maintained below 250°C. Post-weld stress relief is typically not required for most applications, making NM500 ideal for fabrication-intensive projects.
Quality Standards & Testing Protocols
MetalZenith maintains comprehensive quality control systems compliant with ISO 9001:2015 and ISO 14001:2015 standards. Each production batch undergoes rigorous testing including chemical analysis via optical emission spectrometry, Brinell hardness testing across multiple locations, Charpy V-notch impact testing at specified temperatures, and ultrasonic inspection for internal soundness verification. Complete material certificates and test reports accompany every shipment.
🧪 Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.27 |
| Silicon (Si) | ≤ 0.70 |
| Manganese (Mn) | ≤ 1.60 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.010 |
| Chromium (Cr) | 0.25 - 1.50 |
| Nickel (Ni) | ≤ 1.50 |
| Molybdenum (Mo) | ≤ 0.60 |
| Boron (B) | ≤ 0.005 |
| Aluminum (Al) | ≥ 0.015 |
| Titanium (Ti) | ≤ 0.15 |
| Vanadium (V) | ≤ 0.20 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Brinell Hardness (HBW) | 500 ± 30 |
| Tensile Strength (Rm) | 1400 - 1700 MPa |
| Yield Strength (Rp0.2) | ≥ 1200 MPa |
| Elongation (A5) | ≥ 10% |
| Impact Energy (KV) at -20°C | ≥ 25 J |
| Impact Energy (KV) at -40°C | ≥ 20 J |
| Fatigue Limit (10&sup7; cycles) | 450 MPa |
| Elastic Modulus | 210 GPa |
| Poisson's Ratio | 0.30 |
| Reduction of Area | ≥ 35% |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1450 - 1520°C |
| Thermal Conductivity (20°C) | 42 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12.5×10-6/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 | 11.6 mm²/s |
| Emissivity (oxidized surface) | 0.85 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Cut-to-size pieces |
| Thickness Range | 6 - 80 mm |
| Width Range | 1500 - 3200 mm |
| Length Range | 3000 - 12000 mm |
| Standards Compliance | EN 10204-3.1, ASTM A514, JIS G3128 |
| Surface Finish | Hot rolled, Shot blasted, Pickled |
| Thickness Tolerance | ± 0.3 mm (6-20mm), ± 0.5 mm (>20mm) |
| Width Tolerance | +0/-5 mm |
| Length Tolerance | +10/-0 mm |
| Flatness | ≤ 5 mm/m |
| Edge Condition | Mill edge, Flame cut, Plasma cut |
| Delivery Condition | Quenched and Tempered (QT) |
Let Us Create Success for Your Project
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Our Advantages in Processing NM500
Advanced Quenching & Tempering Technology
MetalZenith employs state-of-the-art controlled cooling systems and precision heat treatment processes to achieve uniform hardness distribution throughout the entire plate thickness, ensuring consistent 500 HBW hardness with superior impact resistance and weldability characteristics.
Comprehensive Quality Control Systems
Our ISO 9001:2015 certified quality laboratory conducts rigorous testing including Brinell hardness verification, Charpy impact testing, and complete chemical analysis for every production batch, providing full material traceability and compliance with international standards.
Custom Processing & Global Supply Chain
MetalZenith offers extensive customization capabilities including precision cutting, machining, and surface treatments. Our global distribution network ensures reliable delivery worldwide with comprehensive technical support and engineering consultation services for optimal material selection.
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