Hydronalium
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Hydronalium is a family of aluminium-magnesium alloys. It is an alloy predominantly of aluminium, with between 1%-12% of magnesium as the primary alloying ingredient. It also includes a secondary addition of manganese, usually between 0.4%-1%.
The Hydronalium alloys originated in Germany in the 1930s[1][2] and are best known, at least by that name, in Eastern Europe. They were widely used for shipbuilding in Poland.
There are many alloys within this family, one standard reference listing over twenty.[3]
| Alloy | Hardening | Tensile strength | Yield strength | Elongation (%) | Hardness (Brinell) |
|---|---|---|---|---|---|
| Hydronalium 2[3] | Soft | 193 MPa (28,000 psi) | 90 MPa (13,000 psi) | 30 | 47 |
| Hard | 290 MPa (42,000 psi) | 255 MPa (37,000 psi) | 8 | 77 |