0Cr21Al4 Resistance Wire – Durable Fe-Cr-Al Alloy for Oxidation Resistance & Energy-Saving Heating

Description

0Cr21Al4 resistance wire is an iron-chromium-aluminum (Fe-Cr-Al) alloy designed for high-temperature electric heating applications, offering robust oxidation resistance, mechanical durability, and cost-effective performance. With a composition of 20–23% chromium, 4.5–6.5% aluminum, and balanced iron, this alloy forms a protective alumina (Al₂O₃) layer at temperatures up to 1,300°C (2,372°F), ensuring reliable operation in oxidizing and mildly corrosive environments such as industrial furnaces, household appliances, and automotive heating systems. Its low carbon content (≤0.08%) and controlled silicon (≤1.0%) minimize embrittlement, making it suitable for cyclic thermal operations where longevity and energy efficiency are critical.

Certified to GB/T 1234 and DIN 17470 standards, 0Cr21Al4 wire achieves a tensile strength of 550–700 MPa and a surface load capacity of 2.0 W/cm², outperforming conventional nickel-chromium alloys in cost-effectiveness for mid-range thermal applications. The alloy’s high electrical resistivity (1.30 μΩ·m) and low thermal expansion coefficient (14.5×10⁻⁶/°C) ensure stable energy output and dimensional stability, reducing operational costs in air or inert gas environments.

Technical Specifications (Table)

Applications

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

2. Consumer Appliances: Oven coils, toasters, and electric space heaters.

3. Automotive: Seat warmers, defrosting systems, and exhaust gas heaters.

4. Agriculture: Livestock barn heaters and greenhouse climate control systems.

5. Energy Sector: Low-cost heating solutions for boilers and heat recovery units.

Q&A

Q1: What is the maximum continuous operating temperature for 0Cr21Al4 wire?
A: 1,200°C in continuous use and 1,300°C for short-term operations, ideal for applications requiring moderate thermal stress resistance.

Q2: Can this alloy withstand chlorine-rich atmospheres?
A: Limited resistance. For chlorine exposure above 800°C, consider higher-grade alloys like 0Cr27Al7Mo2.

Q3: Is pre-oxidation treatment necessary for optimal performance?
A: Yes. Heat-treat at 900–1,000°C for 1–2 hours to enhance the alumina layer and extend service life by 20–30%.

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.