20% Manganese Aluminum

Lead-free1" x 6" x 12" Slabs Consistent Recovery Iron Correction in Casting Alloys Manganese Source for Aluminum Alloys

Al-Mn master alloy (80% Al, 20% Mn) for manganese additions to aluminum alloys such as 3003 and 5xxx series. 1" x 6" x 12" slabs.

Solidus

1,216°F (658°C)

Liquidus

1,830°F (999°C)

Density

0.112 lbs/in³ (3.09 g/cm³)

Primary Elements

Al, Mn

Nominal Composition

80% Al, 20% Mn

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Product Overview

20% Manganese Aluminum is an aluminum-manganese master alloy with a nominal composition of 80% Al and 20% Mn. Manganese melts at over 2,270°F and dissolves slowly in aluminum on its own; in this master alloy it is combined with aluminum and dissolves into the melt with consistent recovery.

Manganese is the main alloying element in 3xxx series aluminum alloys such as 3003 and 3004, used for cooking utensils, beverage cans, and heat exchangers, and is added to many 5xxx and 6xxx alloys and some casting alloys. It increases strength, improves corrosion resistance, and in casting alloys helps correct the harmful effect of iron by changing the shape of iron-bearing particles.

Supplied as 1″ x 6″ x 12″ slabs. We also offer 60% Manganese Aluminum for larger additions.

Available Forms

1" x 6" x 12" Slabs

Product Code

1807

Technical Info

Thermal Properties

Melting Point (Solidus)1,216°F (658°C)

Melting Point (Liquidus)1,830°F (999°C)

Physical Properties

Density (imperial)0.112 lbs/in³

Density (metric)3.09 g/cm³

Primary ElementsAl, Mn

Lead FreeYes

Key Features

1" x 6" x 12" SlabsConsistent RecoveryIron Correction in Casting AlloysManganese Source for Aluminum Alloys

Solubility Note

Add to molten aluminum at 1,400°F or above and stir well, allow time for complete dissolution.

Nominal Composition

80% Al
20% Mn

Manganese increases strength and corrosion resistance and is the principal alloying element of the 3xxx series. In casting alloys, it is added to change iron-rich particles from brittle needles to more compact forms, improving ductility.

Divide the manganese needed by 0.20. To add 1% Mn to a 100 lb melt, you need 1 lb of manganese, or 5 lbs of 20% Manganese Aluminum.

The 60% alloy delivers three times as much manganese per pound and is efficient for large additions. The 20% alloy has a lower melting range and dissolves more easily, which suits smaller melts and trim additions.