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Technical Specifications
Product Overview
Metallurgical Characteristics
NM300 is a quenched and tempered wear resistant steel with a martensitic microstructure optimized for abrasion resistance. The controlled chemical composition and precise heat treatment process result in a fine-grained structure with excellent toughness-to-hardness ratio.
Heat Treatment Process
MetalZenith's advanced heat treatment involves austenitizing at 900-950°C followed by controlled water quenching to achieve the desired hardness. Tempering at 200-250°C ensures optimal balance between hardness and toughness while maintaining dimensional stability.
Manufacturing Process
Production begins with electric arc furnace melting using premium raw materials, followed by ladle refining and continuous casting. The steel undergoes controlled rolling in our state-of-the-art hot rolling mill, ensuring uniform thickness and surface quality. Final heat treatment is performed in computer-controlled furnaces with precise temperature monitoring.
Quality Standards
All NM300 products are manufactured in accordance with ISO 9001:2015 quality management systems. Comprehensive testing includes chemical analysis via optical emission spectroscopy, mechanical property verification through tensile and impact testing, hardness mapping, and ultrasonic inspection for internal soundness. Each shipment includes material test certificates and full traceability documentation.
Welding and Fabrication
NM300 can be welded using conventional methods with appropriate preheating (150-200°C) and post-weld heat treatment when required. MetalZenith provides comprehensive welding guidelines and technical support to ensure optimal joint properties and performance in service.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.25 |
| Manganese (Mn) | 1.60 |
| Silicon (Si) | ≤ 0.70 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.010 |
| Chromium (Cr) | 0.25 |
| Nickel (Ni) | 0.25 |
| Molybdenum (Mo) | 0.25 |
| Boron (B) | 0.004 |
| Aluminum (Al) | ≥ 0.015 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HBW) | 280-320 |
| Tensile Strength (Rm) | 950-1250 MPa |
| Yield Strength (Rp0.2) | ≥ 700 MPa |
| Elongation (A5) | ≥ 10% |
| Impact Energy (KV) at -20°C | ≥ 30 J |
| Impact Energy (KV) at -40°C | ≥ 25 J |
| Young's Modulus | 210 GPa |
| Fatigue Limit | 450 MPa |
| Reduction of Area | ≥ 35% |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510°C |
| Thermal Conductivity (20°C) | 42 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity | 0.18 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Poisson's Ratio | 0.27-0.30 |
| Thermal Diffusivity | 11.6 mm²/s |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Coils, Cut-to-size pieces |
| Thickness Range | 4-80 mm |
| Width Range | 1000-3200 mm |
| Length Range | 2000-12000 mm |
| Standards | EN 10204-3.1, ASTM A514, JIS G3114 |
| Surface Finish | Hot rolled, Shot blasted, Pickled |
| Thickness Tolerance | ±0.3 mm (4-20mm), ±0.5 mm (>20mm) |
| Width Tolerance | ±5 mm |
| Length Tolerance | ±10 mm |
| Flatness | ≤5 mm/m |
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Our Advantages in Processing NM300
Advanced Quenching Technology
MetalZenith employs state-of-the-art controlled quenching systems with precise temperature monitoring to achieve uniform hardness distribution and optimal microstructure in NM300 steel plates, ensuring consistent wear resistance properties.
Comprehensive Quality Testing
Our integrated quality control laboratory conducts extensive mechanical testing, chemical analysis, and non-destructive testing on every batch of NM300 steel, guaranteeing compliance with international standards and customer specifications.
Custom Processing Solutions
MetalZenith offers complete customization services including precision cutting, machining, forming, and surface treatment for NM300 steel plates, delivering ready-to-use components tailored to specific application requirements.
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