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Technical Specifications
Product Overview
Metallurgical Characteristics
NM400 HiTemp features a martensitic microstructure with fine carbide precipitation, achieved through MetalZenith's controlled quenching and tempering process. The steel's unique composition with optimized carbon, manganese, and chromium content provides exceptional wear resistance while maintaining structural integrity at elevated temperatures up to 400°C.
Heat Treatment Process
MetalZenith employs a sophisticated heat treatment cycle consisting of austenitization at 900-950°C, followed by controlled water quenching and tempering at 200-250°C. This process ensures optimal hardness distribution and stress relief while maintaining the steel's high-temperature stability. Our computer-controlled furnaces guarantee consistent thermal processing with precise temperature monitoring.
Manufacturing Process
Production begins with electric arc furnace melting using premium raw materials, followed by secondary refining through ladle furnace and vacuum degassing. The steel undergoes continuous casting and controlled rolling to achieve optimal grain structure. MetalZenith's advanced rolling mill technology ensures uniform thickness and superior surface quality throughout the production process.
Quality Standards & Testing
Every batch undergoes comprehensive testing including chemical analysis via optical emission spectroscopy, mechanical property verification through tensile and impact testing, and hardness mapping across the entire surface. High-temperature performance validation ensures reliable service at elevated temperatures. MetalZenith maintains ISO 9001:2015 certification and provides full material traceability documentation.
Welding & Fabrication Guidelines
NM400 HiTemp requires preheating to 150-200°C for welding operations. Recommended electrodes include low-hydrogen types with matching strength characteristics. Post-weld stress relief at 200°C helps maintain optimal properties in heat-affected zones. MetalZenith provides detailed fabrication guidelines and technical support for optimal processing results.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.25 |
| Manganese (Mn) | 1.00 - 1.60 |
| Silicon (Si) | 0.10 - 0.70 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.010 |
| Chromium (Cr) | 0.25 - 1.50 |
| Nickel (Ni) | ≤ 1.50 |
| Molybdenum (Mo) | ≤ 0.50 |
| Boron (B) | 0.0005 - 0.006 |
| Aluminum (Al) | ≥ 0.015 |
| Titanium (Ti) | ≤ 0.05 |
| Vanadium (V) | ≤ 0.20 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HBW) | 370 - 430 |
| Tensile Strength (Rm) | 1200 - 1550 MPa |
| Yield Strength (Rp0.2) | ≥ 1000 MPa |
| Elongation (A5) | ≥ 10% |
| Impact Energy (KV) at 20°C | ≥ 25 J |
| Impact Energy (KV) at -20°C | ≥ 20 J |
| Fatigue Limit (at 2×106 cycles) | 450 MPa |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.27 - 0.30 |
| Hardness Retention at 400°C | ≥ 85% |
| Maximum Service Temperature | 400°C |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1450 - 1520°C |
| Thermal Conductivity (at 20°C) | 42 W/m·K |
| Thermal Conductivity (at 400°C) | 38 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12.5×10-6/K |
| Thermal Expansion Coefficient (20-400°C) | 13.2×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (at 20°C) | 0.20 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
| Thermal Diffusivity | 11.6 mm²/s |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Plates, Sheets, Bars, Strips, Custom Shapes |
| Plate Thickness | 4 - 80 mm |
| Sheet Thickness | 1.5 - 6 mm |
| Width Range | 1000 - 3200 mm |
| Length Range | 2000 - 12000 mm |
| Surface Finish | Hot Rolled, Shot Blasted, Pickled |
| Edge Condition | Mill Edge, Sheared, Flame Cut, Plasma Cut |
| Thickness Tolerance | ± 0.3 mm (t ≤ 20mm), ± 0.5 mm (t > 20mm) |
| Width Tolerance | ± 5 mm |
| Length Tolerance | ± 10 mm |
| Standards Compliance | EN 10204-3.1, ASTM A514, JIS G3106 |
| Delivery Condition | Quenched and Tempered |
Let Us Create Success for Your Project
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Our Advantages in Processing NM400 HiTemp
Advanced Heat Treatment Technology
MetalZenith employs cutting-edge controlled cooling and tempering processes to achieve optimal microstructure in NM400 HiTemp steel. Our proprietary heat treatment technology ensures consistent hardness distribution and superior temperature stability, delivering reliable performance in high-temperature environments up to 400°C.
Comprehensive Quality Control System
Our state-of-the-art testing facility conducts rigorous quality inspections including spectroscopic analysis, mechanical testing, and high-temperature performance validation. Every batch of NM400 HiTemp undergoes strict quality verification to ensure compliance with international standards and customer specifications.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision cutting, machining, and surface treatment services. Our global supply chain network ensures reliable delivery worldwide, while our technical support team provides expert guidance for optimal material selection and application engineering.
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