Nickel-chromium Alloys Electrothermal strip Cr25Ni20

Overview

The Cr25Ni20 Nickel-Chromium Electrothermal Strip is designed for extreme high-temperature environments, with 25% chromium and 20% nickel. It offers excellent oxidation resistance and high resistivity, ideal for industrial furnaces, heat treatment equipment, and glass manufacturing, with a sustained operating temperature up to 1200°C.

Limiting Chemical Composition, %

Chromium(Cr)..................................................................................................................................25.0

Aluminum(Ni)..................................................................................................................................20.0

Balance Iron (Fe) & Trace Elements

Main Properties

Material Characteristics

Key Advantages

● Dual High-Content Reinforcement:

30% Cr + 70% Ni synergy provides triple protection against carburization, sulfidation, and extreme-temperature oxidation.

● Extreme Mechanical Strength:

Maintains ≥200 MPa tensile strength at 1300℃, resisting high-temperature creep deformation.

● Superior Chemical Inertness:

Corrosion rate ＜0.1 mm/year in strong acids, alkalis, and halogen-containing atmospheres.

Typical Applications

● Chemical Reactors:

Heating elements and catalyst carrier wires for ethylene cracking furnaces and ammonia synthesis reactors.

● Nuclear Energy Systems:

Heating wires for reactor control rods, resistance components in high-temperature cooling circuits.

● Special Metallurgy:

Radiant tubes and heating coils for tungsten-molybdenum sintering furnaces and superalloy melting systems.

Technical Specifications