Cr20Ni80 Resistance Strip – Exceptional Thermal Stability & Oxidation Resistance for Industrial Heating

Description

Cr20Ni80 resistance strip is a high-performance nickel-chromium alloy (80% nickel, 20% chromium) designed for demanding high-temperature applications requiring superior oxidation resistance, mechanical durability, and stable electrical resistivity. Renowned for its ability to withstand temperatures up to 1,200°C (2,192°F), this alloy forms a protective chromium oxide (Cr₂O₃) layer that prevents scaling and degradation in oxidizing atmospheres. Its low iron content (<1%) and controlled trace elements (e.g., manganese, silicon) ensure minimal embrittlement and long-term reliability in cyclic heating environments such as industrial furnaces, electric heaters, and aerospace components.

Certified to ASTM B344 and GB/T 1234 standards, Cr20Ni80 strip achieves a tensile strength of 650–850 MPa and elongation ≥20%, outperforming conventional Fe-Cr-Al alloys in high-temperature stability. With an electrical resistivity of 1.09 µΩ·m and a low temperature coefficient of resistance (TCR), it delivers consistent energy efficiency in air, vacuum, or inert gas environments, making it ideal for precision heating applications in sectors like energy production, chemical processing, and consumer electronics.

Technical Specifications (Table)

Applications

1. Industrial Furnaces: Heating elements for annealing, sintering, and heat treatment processes.

2. Energy Sector: Electric boilers, nuclear reactor components, and solar thermal systems.

3. Consumer Appliances: Oven coils, toasters, and hair straighteners.

4. Aerospace: Ignition systems and turbine blade heating elements.

5. Automotive: Glow plugs, exhaust gas recirculation (EGR) heaters.

Q&A

Q1: What is the maximum continuous operating temperature for Cr20Ni80 strip?
A: 1,200°C in oxidizing atmospheres and 1,050°C in reducing or vacuum environments.

Q2: Can Cr20Ni80 withstand sulfur-rich environments?
A: Limited resistance. For sulfur exposure above 800°C, consider alloys with higher chromium or molybdenum content.

Q3: Is pre-oxidation necessary for optimal performance?
A: Optional but recommended. Heat-treat at 900–1,000°C for 1 hour to enhance oxide layer adhesion.

Wuxi Nickel New Material Co., Ltd. is a high-tech enterprise integrating the production, manufacturing, and research & development of specialty alloy materials. Located in Wuxi, Jiangsu Province, the company specializes in precision alloys, titanium alloys, high-temperature alloys, corrosion-resistant alloys, heat-resistant steels, nickel-based welding wires, and other specialty materials, with an annual production capacity of 5,000 tonnes. Our product range includes plates, bars, wires, and strips, which are widely used in industrial electric furnaces, power‐station boilers, petrochemical plants, aerospace, marine engineering, machinery, and electronic instrumentation. These materials are characterized by high electrical resistance, high‐temperature strength, corrosion resistance, wear resistance, and fatigue resistance. We can manufacture in compliance with national, industry, and international standards, and are also able to tailor products to meet specific customer requirements.
The company is committed to improving and enhancing its production infrastructure all year round, with a full range of production and processing equipment including vacuum smelting, hot processing, cold processing, and heat treatment. It also has various physical and chemical analysis testing facilities such as spectrometers to ensure product quality. The company has a high-quality R&D, production, and management team that is fully capable of meeting the complex requirements of the current market for material diversification, refinement, and functionalization. Our company is particularly skilled in developing and producing "specialized materials" that are suitable for the market and specific customer needs, which will be one of our company's characteristics. The company adheres to the business philosophy of "guided by market demand, driven by technological progress, and committed to optimizing and innovating materials to create greater value for customers", serving society and the market.