FeCrAl Alloy Flat Heating Wire | Cr23Al5 (Alchrome DK) | 1400°C Max | Oxidation Resistant | ASTM B603

FeCrAl Alloy Flat Heating Wire | Cr23Al5 (Alchrome DK) | 1400°C Max | Oxidation Resistant | ASTM B603

FeCrAl Flat Heating Wire (Alchrome DK Grade Cr23Al5) | UNS K91240 | 1400°C Continuous | 1.40 μΩ·m Resistivity | ASTM B603 Applications: Industrial Kilns • Glass Annealing Lehers • Semiconductor Diffusion Furnaces • Vacuum Heat Treatment

MATERIAL TECHNOLOGY

Alloy Composition (ASTM B603):

• Cr 22.0-24.0% | Al 4.8-5.5% | Fe bal. | Y2O3 ≤0.5% (rare earth stabilized)
• Density: 7.2 g/cm³ | Melting Point: 1500°C Key Properties:
• Resistivity: 1.40 μΩ·m at 20°C | TCR: +10 ppm/°C
• Oxidation Limit: <0.8 mg/cm² at 1300°C/100hr
• Emissivity: 0.90 at 1200°C

CERTIFIED PERFORMANCE

EXTREME TEMPERATURE RESILIENCE

• Max Service Temp: 1400°C (air) | 1500°C (inert/vacuum)
• Creep Rupture: 100+ hr at 1200°C/20MPa (ISO 204)
• Thermal Cycling: 15,000 cycles (RT↔1300°C)

ELECTRO-THERMAL EFFICIENCY

• Surface Load Capacity: 30 W/cm² (static air)
• Hot-Spot Uniformity: ±7°C @25kW/m²
• Resistance Stability: ΔR/R <2% after 20,000hr at 1250°C

GEOMETRY & DIMENSIONS

Flat Wire Configuration:

• Thickness: 0.8–3.0 mm (±0.02mm)
• Width: 2.0–25.0 mm (±0.1mm)
• Length: Custom coils to 500m Cross-Section Advantages:
• 40% higher surface area vs round wire
• Edge radius: <0.1× thickness (prevents arcing)

SURFACE ENGINEERING

• Pre-Oxidized Finish: Al2O3 layer: 3-5 μm | Ra 0.5-1.0 μm Benefits: Instant oxidation protection at startup
• Bright Annealed: Ra ≤0.4 μm | For vacuum applications
• Spiral-Ready: Pre-annealed for coil winding (min radius = 6× width)

INDUSTRIAL VALIDATION

CERAMIC INDUSTRY:

• Tunnel kiln elements: 3-year life at 1380°C (ISO 5018)
• 50% less sag vs NiCr80/20 at same temperature SEMICONDUCTOR:
• Diffusion furnaces: ±1.5°C uniformity at 1150°C (SEMI F47)
• Outgassing: TML<0.05% at 1200°C (ASTM E595) HEAT TREATMENT:
• Vacuum furnaces: 0% scaling at 10^(-6) Torr
• Carburizing resistance: 5× better than 310S

Packing detail
Spool, coil, wooden case(as per client's requiryment)

Payment&Shipping