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Technical Specifications
Product Overview
Metallurgical Characteristics
NM450 is a low-alloy, high-strength wear-resistant steel produced through controlled quenching and tempering processes. The steel features a tempered martensitic microstructure that provides exceptional hardness while maintaining adequate toughness for demanding applications. The carefully balanced chemical composition ensures optimal hardenability and resistance to thermal softening.
Heat Treatment Process
MetalZenith employs advanced heat treatment technology involving austenitization at 900-950°C followed by controlled water quenching to achieve martensitic transformation. Subsequent tempering at 200-300°C optimizes the balance between hardness and toughness. Our computer-controlled furnaces ensure precise temperature uniformity and consistent mechanical properties throughout the material cross-section.
Manufacturing Process Excellence
Our state-of-the-art production facility utilizes electric arc furnace steelmaking followed by ladle refining and vacuum degassing to achieve superior cleanliness and homogeneity. Continuous casting and controlled rolling processes ensure optimal grain structure and mechanical properties. Advanced cooling systems provide uniform hardness distribution across the entire plate thickness.
Quality Standards and Testing
Every NM450 plate undergoes comprehensive quality verification including chemical analysis via optical emission spectrometry, hardness testing using Brinell method, ultrasonic inspection for internal soundness, and dimensional verification. MetalZenith maintains ISO 9001:2015 certification and provides complete material certificates including mill test certificates (MTC) compliant with EN 10204-3.1 standards.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.25 |
| Manganese (Mn) | 1.00 - 1.60 |
| Silicon (Si) | ≤ 0.70 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.010 |
| Chromium (Cr) | 0.25 - 1.50 |
| Nickel (Ni) | ≤ 1.50 |
| Molybdenum (Mo) | ≤ 0.60 |
| Boron (B) | 0.0005 - 0.0060 |
| Titanium (Ti) | ≤ 0.15 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HBW) | 425 - 475 |
| Yield Strength (MPa) | ≥ 1100 |
| Tensile Strength (MPa) | 1250 - 1550 |
| Elongation (%) | ≥ 10 |
| Impact Energy at -40°C (J) | ≥ 25 |
| Young's Modulus (GPa) | 210 |
| Fatigue Limit (MPa) | 450 - 550 |
| Reduction of Area (%) | ≥ 35 |
| Poisson's Ratio | 0.27 - 0.30 |
🔬 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 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Cut-to-size pieces |
| Thickness Range | 4 - 80 mm |
| Width Range | 1000 - 3200 mm |
| Length Range | 2000 - 12000 mm |
| Surface Finish | Hot rolled, Shot blasted, Pickled |
| Edge Condition | Mill edge, Flame cut, Plasma cut |
| Dimensional Tolerance | Thickness: ±0.3mm, Width: ±5mm |
| Flatness Tolerance | ≤ 5mm/m |
| Standards Compliance | EN 10204-3.1, ASTM A514, JIS G3128 |
| Delivery Condition | Quenched and Tempered |
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Our Advantages in Processing NM450
Advanced Quenching & Tempering Technology
MetalZenith employs cutting-edge controlled cooling systems and precision heat treatment furnaces to achieve optimal microstructure and uniform hardness distribution in NM450 steel, ensuring consistent mechanical properties throughout the material thickness.
Comprehensive Quality Control System
Our state-of-the-art testing laboratory conducts rigorous hardness verification, ultrasonic testing, and chemical composition analysis on every NM450 plate, backed by ISO 9001:2015 certification and complete material traceability documentation.
Custom Processing & Global Supply Chain
MetalZenith offers extensive customization capabilities including precision cutting, machining, and surface treatment services for NM450 steel, supported by our global distribution network ensuring timely delivery worldwide.
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