10% Zirconium Aluminum

Lead-free1" Sheared Pieces Zirconium Source for Aluminum Alloys Elevated Temperature Strength Recrystallization Control

Al-Zr master alloy (90% Al, 10% Zr) for zirconium additions to high-strength and heat-resistant aluminum alloys. 1" sheared pieces.

Solidus

1,220°F (660°C)

Liquidus

1,920°F (1,049°C)

Density

0.103 lbs/in³ (2.85 g/cm³)

Primary Elements

Al, Zr

Nominal Composition

90% Al, 10% Zr

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Product Overview

10% Zirconium Aluminum is an aluminum-zirconium master alloy with a nominal composition of 90% Al and 10% Zr. Zirconium melts at over 3,360°F and does not dissolve readily in molten aluminum on its own; in this master alloy it is present as fine Al3Zr particles that dissolve into the melt at normal alloying temperatures.

Zirconium is added to aluminum alloys at about 0.1–0.25% to form fine Al3Zr dispersoids that control grain structure and inhibit recrystallization. It is used in high-strength aerospace alloys such as 7050 and 7150, in aluminum-lithium alloys, and in heat-resistant and conductor alloys, where it helps retain strength at elevated temperatures. It is also used in research on advanced aluminum alloys and additive manufacturing powders.

Supplied as 1″ sheared pieces for easy weighing and fast dissolution.

Available Forms

1" Sheared Pieces

Product Code

19012

Technical Info

Thermal Properties

Melting Point (Solidus)1,220°F (660°C)

Melting Point (Liquidus)1,920°F (1,049°C)

Physical Properties

Density (imperial)0.103 lbs/in³

Density (metric)2.85 g/cm³

Primary ElementsAl, Zr

Lead FreeYes

Key Features

1" Sheared PiecesZirconium Source for Aluminum AlloysElevated Temperature StrengthRecrystallization Control

Solubility Note

Add to molten aluminum at 1,400–1,500°F and stir well, allow time for the Al3Zr particles to dissolve before sampling.

Nominal Composition

90% Al
10% Zr

Zirconium forms very fine Al3Zr particles that pin grain boundaries, controlling grain size and preventing recrystallization during hot working and heat treatment. This improves strength, toughness, and resistance to stress corrosion cracking in high-strength alloys, and improves strength retention at elevated temperatures.

Divide the zirconium needed by 0.10. To add 0.15% Zr to a 100 lb melt, you need 0.15 lbs of zirconium, or 1.5 lbs of 10% Zirconium Aluminum.

Typical examples are 7050 and 7150 aerospace alloys, aluminum-lithium alloys, some 2xxx alloys, heat-resistant conductor alloys, and newer high-performance casting and additive manufacturing alloys.