Aluminium-Strontium Master Alloy Description
Aluminium-Strontium master alloys are semi‐finished products that can be produced in various forms. They are a pre‐alloyed mixture of alloying elements. Depending on the intended use, they are known as modifiers, hardeners or grain refiners. These master alloys are used in aluminium wrought alloys and cast alloys to adjust the composition and control the microstructure.
The use of Strontium to modify the microstructural characteristics of hypo‐eutectic aluminium–silicon cast alloys is an effective and widely recognised practise. Stanford Advanced Materials offers a complete range of alloys for the global aluminium industry, including the Aluminium-Strontium master alloy.
Aluminium-Strontium Master Alloy Specification
Alloy
|
Si
|
Fe
|
Ti
|
B
|
Ca
|
Mg
|
Sr
|
P
|
Ba
|
Other Elements
|
Total Impurities
|
AlSr3,5
|
0.20%
|
0.30%
|
/
|
/
|
0.03%
|
/
|
3.2~3.8%
|
0.01%
|
/
|
0.03%
|
0.10%
|
AlSr5
|
0.20%
|
0.30%
|
/
|
/
|
/
|
/
|
4.0~6.0%
|
/
|
/
|
0.05%
|
0.15%
|
AlSr10
|
0.20%
|
0.30%
|
/
|
/
|
0.03%
|
0.05%
|
9.0~11.0%
|
0.01%
|
0.10%
|
0.05%
|
0.15%
|
AlSr15
|
0.20%
|
0.30%
|
/
|
/
|
0.05%
|
0.05%
|
14.0~16.0%
|
/
|
0.10%
|
0.05%
|
0.15%
|
AlSr20
|
0.20%
|
0.30%
|
/
|
/
|
0.05%
|
0.05%
|
18.0~22.0%
|
/
|
0.10%
|
0.05%
|
0.15%
|
AlSr10Ti1B0,2
|
0.20%
|
0.15%
|
0.9~1.1%
|
0.18~0.22%
|
/
|
/
|
9.0~11.0%
|
/
|
0.10%
|
0.03%
|
0.10%
|
Aluminium-Strontium Master Alloy Applications
Aluminium-Strontium master alloys have the following applications:
- Hardening agent: They are used to improve the physical and mechanical properties of metal alloys.
- Grain refiner: Used to control the dispersion of individual crystals in metals to produce a finer and more uniform grain structure.
- Modifiers and special alloys: Employed to increase strength, ductility and machinability.
Packaging of Aluminium-Strontium Master Alloys
Ingot
|
200 g per ingot or 250 g per ingot
|
20 kg per carton, 1 m per pallet
|
Wire
|
Diameter 9.1–9.9 mm
|
1 m per wooden crate
|
Waffle
|
7.5 ± 0.5 kg per waffle
|
1 m per pallet wrapped in shrink plastic film
|