Aluminium/Manganese alloy (Al99.7/Mn0.3) is a lightweight, corrosion-resistant metal widely utilized in electrical and structural engineering. With a purity of 99.7% aluminium and a manganese addition of 0.3%, this alloy provides improved mechanical strength, uniform deformation, and thermal stability without significantly compromising electrical conductivity.
Material Overview
Al–Mn alloys belong to the 3xxx-series aluminium family, characterized by solid-solution strengthening through manganese additions of 0.2–1.0 wt%. In Al99.7/Mn0.3, the manganese forms finely dispersed Al6Mn precipitates that hinder dislocation motion, improving yield strength and ductility simultaneously. Studies have shown that adding 0.3 wt% Mn increases the yield strength of high-purity aluminium from 14 MPa to 20 MPa while maintaining a conductivity above 45% IACS (Shen et al., 2023). The alloy exhibits a tensile strength of approximately 70 MPa with good elongation (~30%), making it suitable for forming and drawing operations. Its resistance to recrystallization ensures stability during annealing, while its passive oxide film provides excellent corrosion protection in atmospheric and mild industrial environments.
Applications and Advantages
This alloy is widely used in electrical conductors, automotive heat exchangers, and decorative architectural panels. Its combination of high conductivity and moderate strength makes it ideal for bus bars, wiring components, and battery enclosures in electric vehicles. In recent research, Al–Mn alloys have shown promise for energy-efficient transportation systems due to their recyclability and low density (Shen et al., 2023). Moreover, controlled precipitation heat treatment can refine microstructures, further enhancing both mechanical and corrosion properties (Pouraliakbar et al., 2017). The material’s consistent performance across a wide temperature range also makes it suitable for cryogenic containers and heat transfer equipment.
Goodfellow Availability
Goodfellow supplies Aluminium/Manganese alloy (Al99.7/Mn0.3) in a variety of customizable forms and laboratory-grade purities. It is available for research, prototype development, and industrial testing, offering users reliable consistency and machinability. Custom compositions and dimensions can be provided upon request to meet specialized engineering needs.
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References
- Shen, W., Hu, A., Liu, S. K., & Hu, H. (2023). Al-Mn alloys for electrical applications: A review. Journal of Advanced Lightweight Materials for Energy Systems. https://doi.org/10.1016/j.jalmes.2023.100008
- Shen, W., Hu, A., Wang, J., Dhaif, A., & Hu, H. H. (2023). Nano phase-containing Al-0.3Mn alloy for potential EV applications: microstructure, tensile behavior and electrical conductivity. International Conference on Nanotechnology and Functional Applications. https://doi.org/10.11159/icnfa23.108
- Lee, D. H. (2000). The effect of Mn on the mechanical behavior of Al alloys. Transactions of Materials Processing.
- Pouraliakbar, H., Jandaghi, M. R., & Khalaj, G. (2017). Constrained groove pressing and subsequent annealing of Al-Mn-Si alloy: microstructure evolutions, crystallographic transformations, mechanical properties, electrical conductivity and corrosion resistance. Materials & Design, 127, 141–151. https://doi.org/10.1016/j.matdes.2017.03.053