Alclad 2024-T3 at a glance
Where to buy
Designation
| Item | Value |
|---|---|
| Designation | Alclad 2024-T3 |
| Class | Aluminum |
| Type | wrought aluminum alloy |
Composition
| Element | Limit |
|---|---|
| Si | 0.50 |
| Fe | 0.50 |
| Cu | 3.8–4.9 |
| Mn | 0.30–0.9 |
| Mg | 1.2–1.8 |
| Cr | 0.10 |
| Zn | 0.25 |
| Ti | 0.15 |
| Al | Remainder |
Limits for the core alloy. A single number is a maximum. Source: Aluminum Association Teal Sheets (Aug 2018).
Specifications and forms
| Specification | Form |
|---|---|
| AMS-QQ-A-250/5 | Clad sheet and plate |
Specifications as listed by MIL-HDBK-5J. Federal QQ-A specifications passed to SAE as AMS-QQ-A. Check the current revision.
Properties
| Property | Value | Source |
|---|---|---|
| Ftu, L, A basis, T3 sheet | 60 ksi to 0.062 in · 62 ksi 0.063–0.128 in (bare: 64 ksi) | MIL-HDBK-5J Tables 3.2.3.0(e1), (b1) |
| Sheet tensile stress behind the AN-3 bolt count in a splice | 70,000 psi in Table 4-9 · 55,000 psi in Table 4-10 | AC 43.13-1B Tables 4-9, 4-10, engineering note d |
| Density | 0.100 lb/in³ (2.78 g/cm³) | MIL-HDBK-5J |
| Cladding, plate from 0.250 in | 2½ % nominal | MIL-HDBK-5J Table 3.2.3.0(e1) |
| Bending | Slightly smaller radii than bare | AC 43.13-1B Table 4-6, note 1 |
The handbook gives the cladding percentage in a note to thick material. Thin sheet follows the specification: check AMS-QQ-A-250/5. The two psi figures are the basis of the AC's AN-3 bolt rows, not strengths of the sheet: clad 2024-T3 is named in the title of both tables, and the AC does not say which governs it.
Design allowables, Alclad 2024-T3 flat sheet
| Property, ksi | 0.010–0.062 A | 0.010–0.062 B | 0.063–0.128 A | 0.063–0.128 B |
|---|---|---|---|---|
| Ftu, L | 60 | 61 | 62 | 63 |
| Ftu, LT | 59 | 60 | 61 | 62 |
| Fty, L | 44 | 45 | 45 | 47 |
| Fty, LT | 39 | 40 | 40 | 42 |
| Fcy, L | 36 | 37 | 37 | 39 |
| Fcy, LT | 42 | 43 | 43 | 45 |
| Fsu | 37 | 38 | 38 | 39 |
| Fbru, e/D = 1.5 | 97 | 99 | 101 | 102 |
| Fbru, e/D = 2.0 | 121 | 123 | 125 | 127 |
| Fbry, e/D = 1.5 | 68 | 70 | 70 | 73 |
| Fbry, e/D = 2.0 | 82 | 84 | 84 | 88 |
Flat sheet, T3, thickness in inches, AMS-QQ-A-250/5, MIL-HDBK-5J Table 3.2.3.0(e1), p. 3-75. S, A and B are the MIL-HDBK-5J statistical bases. L is the longitudinal grain direction, LT the long transverse. Bearing values are dry-pin values. Clad sheet has a primary and a secondary modulus: see the handbook table.
Bend radii (AC 43.13-1B Table 4-6)
| Alloy and temper | 0.016" | 0.032" | 0.064" | 0.128" | 0.182" | 0.258" |
|---|---|---|---|---|---|---|
| 2024-O | 0 | 0 – 1t | 0 – 1t | 0 – 1t | 0 – 1t | 0 – 1t |
| 2024-T3 | 1½t – 3t | 2t – 4t | 3t – 5t | 4t – 6t | 4t – 6t | 5t – 7t |
| 2024-T6 | 2t – 4t | 3t – 5t | 3t – 5t | 4t – 6t | 5t – 7t | 6t – 10t |
Recommended radii for 90-degree bends, as multiples of sheet thickness t. Alclad sheet may go slightly tighter than bare (Table 4-6 note 1). The drawing or SRM governs.
Forms and thicknesses in stock
| Distributor sheet | Listed | Thickness, in |
|---|---|---|
| 2024T3 Alclad Aluminum Sheet | 0.016"–0.250" · Alclad/bare · lb/ft² | .016, .020, .025, .032, .040, .050, .063, .071, .080, .090, .125, .160, .190, .250 |
As distributors list them, not a statement of what a specification allows.
Weight by thickness
| Thickness, in | mm | lb/ft² | kg/m² |
|---|---|---|---|
| 0.016 | 0.41 | 0.230 | 1.12 |
| 0.020 | 0.51 | 0.288 | 1.41 |
| 0.025 | 0.64 | 0.360 | 1.76 |
| 0.032 | 0.81 | 0.461 | 2.25 |
| 0.040 | 1.02 | 0.576 | 2.81 |
| 0.050 | 1.27 | 0.720 | 3.52 |
| 0.063 | 1.60 | 0.907 | 4.43 |
| 0.071 | 1.80 | 1.020 | 4.98 |
| 0.080 | 2.03 | 1.150 | 5.61 |
| 0.090 | 2.29 | 1.300 | 6.35 |
| 0.125 | 3.17 | 1.800 | 8.79 |
| 0.190 | 4.83 | 2.740 | 13.38 |
Weight as a distributor lists it. Kilograms and millimetres converted.
Notes from the guide
- Not a source of design allowables. Values are for reference. MMPDS and the SRM govern a repair.
- Not a substitution approval. A different alloy or temper needs approved data.
- Not bare. Values on this page do not apply to bare 2024.
Where to buy
Distributors coming soon.
Sources
- FAA AC 43.13-1B CHG 1, Chapters 4 and 7 — Tables 4-6, 4-9, 4-10; pp. 3-9, 4-12; Chapter 6 on blasting.
- FAA-H-8083-31B, AMT Handbook — Airframe, Volume 1, Chapter 4 — p. 4-89; Figure 4-168, p. 4-87.
- MIL-HDBK-5J (31 Jan 2003), Chapter 3 — Tables 3.2.3.0(a), (b1), (e1). Cancelled and superseded by MMPDS: check current MMPDS before design use.
- Aluminum Association, International Alloy Designations (Teal Sheets), rev. Aug 2018 — chemical composition limits and nominal densities.
- MMPDS (formerly MIL-HDBK-5) — the current home of design allowables. A repair substantiation cites MMPDS or the SRM, not a website.
- Distributor listings — stock forms, sizes and listed facts, read 30 September 2026.