0Cr21Al6Nb Resistance Strip – Advanced Fe-Cr-Al-Nb Alloy for Extreme Heat & Corrosion Resistance

Description

0Cr21Al6Nb resistance strip is a niobium-enhanced iron-chromium-aluminum (Fe-Cr-Al-Nb) alloy engineered for superior performance in high-temperature electric heating applications, offering exceptional oxidation resistance, mechanical stability, and extended service life. With a composition of 20–23% chromium, 5.5–7.0% aluminum, 0.5–1.5% niobium, and balanced iron, this alloy forms a self-healing alumina (Al₂O₃) layer at temperatures up to 1,450°C (2,642°F), providing unmatched protection against oxidation, carburization, and sulfurization in harsh industrial environments. The addition of niobium refines grain structure, enhances creep resistance, and minimizes embrittlement caused by cyclic thermal stress, making it ideal for applications requiring long-term reliability under extreme conditions.

Certified to GB/T 1234 and DIN 17470 standards, the 0Cr21Al6Nb strip achieves a tensile strength of 600–750 MPa and a surface load capacity of 2.3 W/cm², outperforming conventional Fe-Cr-Al alloys in high-temperature stability. Its high electrical resistivity (1.38 μΩ·m) and low temperature coefficient of resistance (TCR) ensure consistent energy efficiency, reducing operational costs in industrial furnaces, aerospace systems, and energy-intensive heating processes.

Technical Specifications (Table)

Applications

1. Industrial Heating: Heating elements for high-temperature sintering, annealing, and heat treatment furnaces.

2. Aerospace: Ignition systems, turbine blade heating, and exhaust components in jet engines.

3. Energy Sector: Electric resistance heaters for boilers, reactors, and thermal power plants.

4. Automotive: Glow plugs, EGR systems, and diesel particulate filter regeneration.

5. Chemical Processing: Corrosion-resistant heating elements in sulfur-rich or chlorine-laden atmospheres.

Q&A

Q1: How does niobium improve the performance of 0Cr21Al6Nb compared to standard Fe-Cr-Al alloys?
A: Niobium enhances grain boundary strength, reduces carbide precipitation, and improves creep resistance at temperatures above 1,200°C, significantly extending service life.

Q2: What is the maximum continuous operating temperature for this alloy?
A: 1,350°C in continuous use and 1,450°C for short-term operations, with optimal performance in oxidizing or inert atmospheres.

Q3: Is pre-oxidation necessary for 0Cr21Al6Nb heating elements?
A: Yes. Heat treatment at 950–1,100°C for 1–2 hours accelerates alumina layer formation, improving oxidation resistance by up to 40%.

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.