HexWeb CR III 5052, 1/8 in cell, typical values
Where to buy| Density, lb/ft³ | Bare compressive, psi | Plate shear L, psi | Plate shear W, psi |
|---|---|---|---|
| 3.1 | 285 | 210 | 130 |
| 4.5 | 550 | 340 | 220 |
| 6.1 | 980 | 560 | 340 |
| 8.1 | 1,500 | 800 | 470 |
Hexcel CR III data sheet, Table I, typical (typ) values; a minimum-average column also exists. Columns read from the table in the sheet. 5052 and 5056 are supplied in H-39 temper; density tolerance ±10%.
Designation and coating
The designation is Material – Cell size – Alloy – Density, for example CR-III – 3/16 – 5052 – 3.1N: cell size 3/16 in, alloy 5052, density 3.1 lb/ft³, N for unperforated cell walls. CR III is the corrosion-resistant coating, meeting MIL-C-7438 where applicable.
Hexcel reports shear strength after 350 °F heat ageing for up to 500 hours plus 30 days of salt spray at about 88% of room-temperature properties with no salt spray.
What the FAA says about it
Aluminum: best strength-to-weight ratio and energy absorption, good heat transfer and electromagnetic shielding, smooth thin cell walls, machinable and relatively low cost (FAA-H-8083-31B, p. 7-11).
Aluminum facings and cores need their own isolation from carbon facings; see repair materials.
Limits — when NOT to use this
- One alloy family and cell size shown.
- Typical values. Minimum values are lower.
- Comparison with Nomex mixes two manufacturers’ sheets.
Where to buy
Distributors coming soon.
Sources
- Hexcel HexWeb CR III Corrosion Resistant Specification Grade Aluminum Honeycomb, Product Data Sheet (2017) — designation, alloys and temper, density tolerance, Table I (5052 mechanical properties).
- Hexcel HexWeb HRH-10 Product Data Sheet (inch) — designation, density tolerance, mechanical properties table.
- FAA-H-8083-31B, AMT Handbook — Airframe, Volume 1 (2023), Chapter 7 — aluminum honeycomb (p. 7-11).