AJ alloys

AJ alloys (AJ52 and AJ62) are die castable alloys of magnesium that have good creep resistance at high temperature. They contain magnesium, aluminium, and strontium.[1]

In the names the 'J' refers to Strontium.

Alloy   Mg     Al%  Sr%  Mn%
AJ62  Balance  6    2    0.34   [2]
AJ52  Balance  5    2    0.4    [3]

AJ52 has higher creep resistance, and AJ62 has better castability. Both are used in the BMW magnesium–aluminium composite engine block.[4]

## References

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1. ^ M. Scharrer; et al. (2007). "Advances in Magnesium Injection Molding (Thixomolding)". In K. U. Kainer (ed.). Magnesium: Proceedings of the 7th International Conference on Magnesium Alloys and Their Applications. Wiley-VCH. p. 252\. ISBN 978-3-527-31764-6.
2. ^ http://www.archivesmse.org/vol28_6/2865.pdf Archived 2011-07-25 at the Wayback Machine. MSE AJ62
3. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2011-07-28. Retrieved 2009-09-03.`{{cite web}}`: CS1 maint: archived copy as title (link)
4. ^ Helmut Kaufmann and Peter J. Uggowitzer (2007). Metallurgy and Processing of High-Integrity Light Metal Pressure Castings. Fachverlag Schiele & Schoen. p. 197\. ISBN 978-3-7949-0754-0.

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