PAA-CORE® 5056 aluminum honeycomb is the industry’s highest-performing core material. Phosphoric acid anodized and coated with a proprietary primer, it out performs all other core materials.

Decades of operational experience have shown that bond durability between core and face sheets is critical to long part life, and for this, PAA-CORE® has no equal. Independent analysis confirms the environmental performance durability of PAA-CORE®, assuring a lower total life cost than with other core materials. PAA-CORE® also has unsurpassed corrosion resistance, experiencing only minimal weight loss after 31 days in an acidified salt spray chamber, which simulates the harshest environmental conditions. PAA-CORE® retained virtually all of its physical properties during this test.

More importantly, PAA-CORE® outperforms non-metallic core materials. With significantly higher strength-to-weight ratios and hot/wet strength, it offers designers higher performance with lower weight. In addition, it saves money, since PAA-CORE® costs less than non-metallic cores.

There is simply no equivalent to Alcore’s PAA-CORE®.

Safety Datasheet


·         Physical state: Solid

·         Appearance: Metallic honeycomb shaped structure

·         Color: Grayish in Color

·         Odor: Odorless

·         Melting point: 660 °C (1220°F)

·         Freezing point: No data available

·         Boiling point: 2056 °C (3732.8°F)

·         Vapor pressure: Negligible

·         Relative density: 2.7

·         Solubility: Insoluble. Aluminum dust generated by machine processes may react with water

·         Chemical stability: Product is stable. Hazardous polymerization will not occur.

·        Conditions to avoid: Aluminum dust may generate hydrogen and heat when exposed to water. Water/aluminum powder mixture may be especially hazardous when confined and may react violently with strong oxiders and many halogenated hydrocarbons.

·        Incompatible materials: Water and halogenated hydrocarbons may react with aluminum dust. Strong oxidizing agents.

·        Hazardous decomposition products: Thermal decomposition or combustion may produce carbon monoxide and/or carbon dioxide.

Technical Datasheet


·         Excellent strength-to-weight ratio

·         Elevated temperature performance to 350°F/177°C

·         Fire and fungus resistant

·         Eliminates need for priming or pour-coat

·         Easily machined and formed

·         Resistant to hostile environments

·         Exceeds AMS-C-7438 and many other aerospace specific


·         Longer service aircraft flooring

·         Aircraft landing gear doors

·         Extended service aircraft engine nacelles

·         Marine and naval panels

·         Advanced energy absorbers

·         High performance composite structures

·         Replacement for non-metallic core materials


·         PAA-CORE® 5056 aluminum honeycomb is available with cell perforations to facilitate venting. Custom dimensions, cell sizes, tolerances and mechanical properties are also available.


0.8, 1.6, 1.8, 2.0, 2.1, 2.3, 2.6, 3.0, 3.1, 3.7, 3.8, 4.0, 4.2, 4.3, 4.4, 4.5, 5.2, 5.4, 5.7, 6.0, 6.1, 6.5, 6.9, 7.9, 8.1, 8.4, 10.0, 12.0 lb/ft3

Cell Size:

5/32, 3/16, 1/8, 1/4, 3/8, ½, ¾ inches

Foil Gauge:

0.0007, 0.001, 0.0015, 0.002, 0.0025, 0.003, 0.004, 0.005, 0.006 inches

Structural Orientation:

Perforated or Non-Perforated

Expanded or Unexpanded

Material Dimensions:

Ribbon (L)

Standard: 48”



Maximum: 100”


Transverse (W)

Standard: 96”



Maximum: 144”


Thickness (T):

Standard: N/A



Maximum: 35”

Material Build:

Compressive Stabilized









Plate Shear – L-Direction






Plate Shear – W-Direction






Shear Modulas – W-Direction



Shear Modulas – L-Direction