Magnesio
Pure magnesium (≥ 99.90 %) for Mg adjustment in Al-Si-Mg alloys. Essential for mechanical properties with T6 heat treatment.
Pure magnesium (≥ 99.90 %) is a fundamental alloying element in aluminum alloys of the Al-Si-Mg family (A356, A357). Magnesium, together with silicon, forms the hardening phase Mg₂Si that precipitates during T6 heat treatment, multiplying the alloy's mechanical properties. Without adequate magnesium, the alloy does not respond to heat treatment. Commercialized in ingots of ~7.5 kg each.
Chemical Composition
| Element | Symbol | Percentage |
|---|---|---|
| Magnesium | Mg | ≥ 99.90 % |
| Aluminum | Al | ≤ 0.02 % |
| Zinc | Zn | ≤ 0.01 % |
| Manganese | Mn | ≤ 0.02 % |
| Silicon | Si | ≤ 0.01 % |
| Iron | Fe | ≤ 0.03 % |
Physical Properties
| Property | Value |
|---|---|
| Melting point | 650 °C |
| Density | 1.74 g/cm³ |
| Form | Lingotes ~7.5 kg |
Metallurgical Function
Magnesium adjustment in Al-Si-Mg alloys. Mg forms the Mg₂Si phase that precipitates during artificial aging (T6), providing the main hardening mechanism in A356/A357 type alloys.
Dosage & Usage
Typical target in A356: 0.25–0.45% Mg. Magnesium tends to oxidize (10–30% loss), so it is added in calculated excess. Submerge the ingot with a plunger bell or perforated basket to avoid surface ignition. Do not leave Mg floating on the surface.
Applications
- Al-Si-Mg alloys: A356, A357, A360
- 6xxx series extrusion alloys (6061, 6063)
- Any alloy requiring T6 heat treatment response
Industries
Automotive
Mg adjustment in A356 alloys for wheels and T6 components
Aluminum Casting
Essential element for heat-treatable high-strength alloys
Extrusion
Mg adjustment in 6061/6063 for structural profiles
Special Notes
⚠️ Magnesium is flammable. Handle with dry tongs, store in a dry, ventilated location. Never apply water to incandescent magnesium — use dry sand or class D extinguishers. Always submerge below the surface of the molten bath to avoid ignition and maximize recovery.
Need Magnesio?
We offer competitive pricing with immediate availability from our plant in Puebla. We serve foundries, auto parts manufacturers, and extruders throughout Mexico.