Aluminum Strontium Master Alloy AlSr5, AlSr10, AlSr15 Shape: stick, waffle, CCB, ingot AlSr10 specification: Sr 9 â 11% Fe 0.30% max. Si 0.30% max. Ca 0.10% max. Mg 0.10 % max. P 0.01%max. Ba 0.10% max. OTHERS EACH 0.04% max. OTHERS TOTAL 0.10% max. BALAANCE PRIMARY ALUMINIUM 99.7% Professional Aluminum Master Alloys manufacturer in China, supply Aluminum Master Alloys with good quality and competitive price, our products have been exported to more than 20 countries in the world.