Primary 99.7% Aluminum

Lead-free50 Lb. Ingots 99.7% Minimum Aluminum Economical Alloy Base Standard Primary Grade

Primary aluminum, 99.7% minimum, in 50 lb ingots. Economical base metal for alloy production, deoxidation, and general melting.

Solidus

1,190°F (643°C)

Liquidus

1,215°F (657°C)

Density

0.098 lbs/in³ (2.7 g/cm³)

Primary Elements

Nominal Composition

99.7% Al

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Product Overview

Primary 99.7% Aluminum is smelter-grade aluminum with a minimum purity of 99.7% Al, supplied in 50 lb ingots. It melts at roughly 1,190–1,215°F (643–657°C) and has a density of 0.098 lbs/in³ (2.70 g/cm³). This is the most widely produced grade of primary aluminum and the standard base metal for making aluminum alloys.

Foundries and alloy producers use 99.7% aluminum to build alloy melts and to dilute impurities such as iron and silicon in recycled aluminum. It is also used as a deoxidizer in steel and other metals, in the production of master alloys and aluminum compounds, and for general melting where the very highest purity is not required.

We also offer Primary 99.85% Aluminum and higher-purity 99.9% and 99.99% grades for applications with tighter impurity limits.

Available Forms

50 Lb. Ingots

Product Code

1006

Technical Info

Thermal Properties

Melting Point (Solidus)1,190°F (643°C)

Melting Point (Liquidus)1,215°F (657°C)

Physical Properties

Density (imperial)0.098 lbs/in³

Density (metric)2.7 g/cm³

Primary ElementsAl

Lead FreeYes

Key Features

50 Lb. Ingots99.7% Minimum AluminumEconomical Alloy BaseStandard Primary Grade

Solubility Note

Melts readily in all standard furnaces, preheat ingots before adding to a molten bath to remove moisture.

Nominal Composition

99.7% Al

Both are primary (smelter) aluminum. 99.7% is the standard commercial grade and contains slightly more trace iron and silicon. 99.85% is a higher-purity grade used where those impurities must be kept lower, such as some electrical and specialty alloys. For most alloying and general melting, 99.7% is the economical choice.

Primary aluminum has a known, consistent composition. Adding it to a melt dilutes impurities that build up in recycled aluminum, such as iron, and gives a predictable base for alloying.

Make sure ingots are completely dry, and preheat them before adding them to molten metal. Moisture trapped on or in an ingot can turn to steam instantly and cause a dangerous metal explosion.