Heaters
FHL® Radiant Heaters
High-efficiency radiant heater assemblies for uniform, contamination-free industrial heating.
FHL® Radiant Heaters are complete heating assemblies designed to transfer heat predominantly through thermal radiation, delivering efficient, uniform heating without direct contact between the heating elements and the workload. Each assembly integrates FHL® resistance elements with engineered insulation and support systems to ensure reliable performance, effective heat distribution, and suitability for demanding industrial heating applications.
Up to 1420°CKey features
Radiant-dominant heat transfer — uniform and contact-free
Built around long-life FHL® resistance elements
Vertical & Horizontal Mounting for High-Power-Density Applications
Engineered insulation and support systems included
Sized to your chamber, rating and atmosphere
Easy Plug-in & Replacement Type Heaters.
We manufacture FHL® Radiant Heaters in a range of configurations, custom-sized to suit your furnace chamber and process requirements for reliable, efficient heating across heat treatment, coating, drying and other industrial thermal applications.
Custom-Built Parameters
- Construction
- Easy Plug-in & Replacement Type Heaters.
- Rating
- Custom-built to chamber and process requirement
- Elements
- Fe-Cr-Al & Ni-Cr alloys
Typical Applications
Technical data
Published grade data for FHL® heaters. Values are typical for the grade; confirm design values with our engineers for your duty cycle.
Physical & Mechanical Properties of FHL-MULTICORE® Heating Elements
Other elements present in small quantity. Values are typical for the grade; confirm design values with our engineers for your duty cycle.
| Fe-Cr-Al Heating Element | Ni-Cr 80 Heating Element | ||
|---|---|---|---|
| Property | Alloy 1 | Alloy 2 | Ni-Cr 80 |
| Standard Chemical Composition (%) | Al 5.0 · Cr 23 · Fe 72 | Al 6.0 · Cr 23 · Fe 71 | Cr 19–21 · Fe < 1 · Ni ≥ 77 |
| Max. Duty Temp. of Heating Element (°C) | 1320 | 1420 | 1150 |
| Electric Resistivity (Ω·mm²/m) | 1.35 ± 5% | 1.45 ± 5% | 1.08 ± 5% |
| Density (g/cm³) | 7.25 | 7.1 | 8.3 |
| Expansion from Thermal Factor (K⁻¹) | 15.1 × 10⁻⁶ | 14.8 × 10⁻⁶ | 17.6 × 10⁻⁶ |
| Thermal Conductivity at 20°C (W/m·K) | 13 | 13 | 13 |
| Specific Heat Capacity at 20°C (kJ/kg·K) | 0.46 | 0.46 | 0.46 |
| Melting Point (°C) | 1500 | 1500 | 1400 |
| Hardness Hv | 200 – 240 | 200 – 240 | 180 – 200 |
| Electric Resistance Temp. Coefficient | 33 × 10⁻⁶ | 15 × 10⁻⁶ | 58 × 10⁻⁶ |
| Increase from Oxidation 1200°C (mg/cm²·h) | 0.05 | 0.05 | 0.25 or less |
| Tensile Strength MPa (kgf/mm²) | 650 – 900 (65 – 90) | 650 – 900 (65 – 90) | 700 – 900 (70 – 90) |
| Magnetic Properties | Magnetic (Curie point 600°C) | Magnetic (Curie point 600°C) | Non-Magnetic |
Let's build your upgrade
Need Radiant Heaters built to your drawing?
Send us your chamber dimensions, temperature and cycle — we will respond with a technical proposal and quotation.