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High Purity Aluminum

High Purity Aluminum Block

High Purity Aluminum - Ingot - Block| SKU: varies by variant
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$550.00 USD
$550.00 USD
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GDMS COA included with each shipment. Most standard items ship within 1 to 2 business days.

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High purity aluminum blocks are rectangular products designed for applications requiring low impurity levels, consistent material properties, and high performance at cryogenic temperatures. Produced from aluminum refined through directional solidification under vacuum, these blocks offer exceptionally low inclusion content, enabling high Residual Resistivity Ratio (RRR) performance critical for superconducting RF (SRF) cavities, quantum computing hardware, and other advanced cryogenic systems.

We maintain stock of several rectangular block sizes, including 50 × 95 × 165 mm, 70 × 165 × 170 mm, 89 × 89 × 244 mm, and larger formats up to 95 × 229 × 305 mm. Custom sizes and machining services are available upon request. 

Blocks are offered in purities from 4N (99.99%) to 6N (99.9999%), with full GDMS Certificates of Analysis provided with every shipment. Specialty alloy compositions, including AlSi, AlCu, AlCuSi, AlMg, AlMgSi, AlNi, and AlNd, can also be supplied to meet specific application 

Typical Applications:
•    Remelting and custom alloy casting
•    Large-format sputtering target fabrication
•    High-RRR components for superconducting RF cavities
•    Machined parts for quantum computing and superconducting qubit systems
•    Precision feedstock for aerospace, defense, and semiconductor research
•    University and national laboratory R&D programs

Most standard items ship within 1–2 business days. Custom sizes and machining services are available to support specialized project requirements.

Related Articles
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Future of HPA in Advanced Manufacturing
How to Choose Between 4N, 5N, 5N5 and 6N
 

 

Typical Applications

  • Semiconductor metallization and interconnect layers
  • Flat panel display and touch screen coatings
  • Optical coatings and precision mirrors
  • Hard disk drive media
  • Solar cell contacts
  • MEMS and sensor device fabrication
  • Decorative and functional PVD coatings

Send us your target design for a custom quote

Typical Chemical Analysis Contact Us for Custom Sizes
MaterialAluminum (Al)
Purity range4N (99.99%) to 6N (99.9999%)
Alloy optionsAlSi, AlCu, AlCuSi, AlMg, AlMgSi, AlNi, AlNd
Available diameters1" (25mm) to 12" (305mm)
Available thicknesses0.125" (3.2mm) to 1" (25.4mm)
Production methodDirectional solidification in vacuum (5N and above). Cast (4N).
FormsDisk, bonded assemblies, custom shapes
CertificationGDMS COA included with each shipment
Shipping1 to 2 business days (standard US), 2 to 5 days international
Custom ordersCustom sizes, thicknesses, alloys, and bonded assemblies available
What purity sputtering target do I need for semiconductor applications?
For semiconductor metallization and interconnect layers, 5N (99.999%) is the standard choice. For higher-end applications such as superconducting devices or quantum computing, 6N (99.9999%) targets reduce trace metal contamination to levels required by those processes. 4N targets are suitable for general thin-film coating and decorative applications.
Can I get a bonded sputtering target assembly?
Yes. HPA supplies bonded target assemblies designed to match your specific sputtering tool and process requirements. Contact us with your target design, backing plate specifications, and bonding requirements for a custom quote.
What is the difference between cast and directionally solidified targets?
HPA's super high purity targets (5N and above) are produced using directional solidification in vacuum, not cast. This process prevents inclusions from entering the metal, enabling us to maintain the highest purities. Cast targets at lower purities (4N) are suitable for applications where trace-level contamination is less critical.
What sizes are available and can you make custom sizes?
Stock sizes range from 1" (25mm) to 12" (305mm) in diameter with thicknesses from 0.125" (3.2mm) to 1" (25.4mm). Larger sizes and custom dimensions are available with short lead times. Contact us with your specifications.
Technical guide

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