Lead-freeDie Soldering PreventionHot Tear ResistanceHigh-Volume Iron AdditionDie Casting Grade
High-concentration Al-Fe master alloy (70% Al, 30% Fe) for efficient iron additions to aluminum die casting melts. Die soldering prevention. 16-20 waffle.
30% Ferro Aluminum is a high-concentration master alloy with a nominal composition of 70% Al and 30% Fe, designed for the precise addition of iron to aluminum foundry melts. Solidus is approximately 1,220°F (660°C) and liquidus approximately 2,060°F (1,125°C), with a density of 0.119 lbs/in³ (3.30 g/cm³). The 30% concentration allows for efficient high-volume iron additions without the thermal shock or slow dissolution rates associated with using pure iron scrap. Dissolution is good in molten aluminum at 1,375°F and above.
Iron is a critical alloying element in die casting where it prevents die soldering — the bonding of molten aluminum to steel tooling — while also improving hot tear resistance and hardness. Most high-pressure die casting alloys specify 0.7–1.3% Fe specifically for this purpose. The 30% grade is suited to production-scale operations where larger iron additions are required per heat, offering a more concentrated and cost-effective addition than the 10% grade.
Supplied in 16–20 waffle form for consistent charge weight calculation and uniform dispersion of iron-aluminide phases throughout the casting.
Available Forms
16-20 Waffle
Product Code
1702
Technical Info
Thermal Properties
Melting Point (Solidus)1,220°F (660°C)
Melting Point (Liquidus)2,060°F (1,127°C)
Physical Properties
Density (imperial)0.119 lbs/in³
Density (metric)3.3 g/cm³
Primary ElementsAl · Fe
Lead FreeYes
Key Features
Die Soldering PreventionHot Tear ResistanceHigh-Volume Iron AdditionDie Casting Grade
Solubility Note
Good dissolution in molten aluminum at 1,375°F and above; melt must be at temperature before addition to avoid undissolved sludge.
Nominal Composition
30 Fe
70 Al
Frequently Asked Questions
Common technical inquiries regarding 30% Ferro Aluminum
The melt should be at or above 1,375°F before adding 30% Ferro Aluminum. At lower temperatures, the iron-rich intermetallic phases in the master alloy do not fully dissolve, settling as dense sludge at the furnace bottom. This not only results in poor iron recovery but risks introducing hard Al-Fe intermetallic inclusions into the casting if the furnace is disturbed. Temperature verification and thorough stirring after addition are essential for consistent recovery.
The 30% grade is preferred for larger furnaces and higher-volume production where the iron addition per heat is substantial — typically when adding 0.5% or more Fe to a large charge weight. Its higher concentration reduces the volume of master alloy required, minimizing the associated aluminum dilution from the carrier. The 10% grade is better suited to smaller heats, lower-temperature operations, or situations where very precise small iron additions are needed with minimal risk of localized sludge formation.
Beyond die soldering prevention, iron in aluminum-silicon die casting alloys forms Al5FeSi intermetallic phases that increase hardness and hot tear resistance but progressively reduce elongation and impact strength as iron content rises above 1.3%. The foundry engineer must balance the minimum iron required for die release against the maximum acceptable for mechanical properties — most commercial die casting alloys specify 0.7–1.3% as this range provides die protection without unacceptable ductility loss.
Al-Be master alloy (97.5% Al, 2.5% Be) for oxidation control and dross reduction in aluminum and magnesium casting melts. 4-5 oz pieces and 5 lb slabs.
Concentrated Al-Be master alloy (95% Al, 5% Be) for oxidation control in large-scale aluminum and magnesium casting. Higher potency than 2.5% grade. 4-5 oz pieces and 5 lb slabs.
Al-Si master alloy (50% Al, 50% Si) for precise silicon additions to improve fluidity and reduce shrinkage in aluminum casting alloys. Waffle and granular forms.
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