Nickel-chromium Alloys Electric furnace wire Cr30Ni70

Overview

Cr30Ni70 Nickel-Chromium Alloy Electric Furnace Wire features a reinforced composition of 30% chromium and 70% nickel, engineered for extreme corrosive (acid/alkali/sulfide) and high-temperature oxidative environments. With continuous operation at 1250°C (short-term peak 1400°C) and outstanding intergranular corrosion resistance, it is the premier heating solution for heavy industries including petrochemicals, metallurgy, and waste incineration.

Limiting Chemical Composition, %

Chromium(Cr)..................................................................................................................................30.0

Aluminum(Ni)..................................................................................................................................70.0

Balance Iron (Fe) & Trace Elements

Main Properties

Material Characteristics

Material Characteristics

● Triple Protection:

Chromium-rich Cr₂O₃ layer resists sulfide corrosion and oxidative spalling.

● Thermal Shock Resistance:

Grain boundary engineering withstands rapid thermal cycling (>1000°C).

● Low Expansion Coefficient:

40% less deformation at high temps enhances mounting stability.

Core Advantages

● Harsh Environment Durability:

3x lifespan in pH 2-12 corrosive media.

● Carburization Immunity:

High chromium blocks carbon penetration to prevent embrittlement.

● Modular Replacement:

Pre-welded connectors enable on-site rapid maintenance.

Typical Applications

● Petrochemical Cracking Furnace Tubular Heating Systems

● Metallurgical Continuous Casting Mold Heating Modules

● Hazardous Waste Incinerator Secondary Combustion Chamber Heating Belts

● Offshore Platform High-Temp Desulfurization Equipment

Technical Specifications