AA 2198 Aluminum Alloy
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Семейство: Aluminum Alloy
Copper Alloy (Al-Cu). AA designation 2198.
Overview
AA 2198 is a modern aluminium–copper–lithium alloy (2.9–3.5% Cu, 0.8–1.1% Li) formulated to replace 2024 in fuselage skins. It reduces density by roughly 3–4%, improves fatigue crack-growth resistance, and holds good corrosion resistance compared with older aluminium–copper grades. These gains make it a candidate for commercial aircraft fuselage skins, floor panels, and lower wing skin panels.
Рейтинги характеристик
Performance Radar
| Свойство | Rating |
|---|---|
| Strength | 3 / 10 |
| Corrosion Res. | 6 / 10 |
| Lightweight | 9 / 10 |
| Machinability | 8 / 10 |
| Affordability | 7 / 10 |
| Heat Res. | 4 / 10 |
Состав
Механические свойства
| Предел прочности на растяжение | 157.0 MPa |
| Предел текучести | 452.0 MPa |
| Твёрдость (по Роквеллу) |
Химический состав
| Элемент | Процентное содержание (%) |
|---|---|
| Ag | 0,285 |
| Al | 94,75 |
| Cr | 0,05 |
| Cu | 3,31 |
| Fe | 0,053 |
| Li | 0,98 |
| Mg | 0,32 |
| Mn | 0,04 |
| Ni | 0,01 |
| Pb | 0,01 |
| Si | 0,03 |
| Ti | 0,028 |
| Zn | 0,02 |
| Zr | 0,14 |
Где купить AA 2198 Aluminum Alloy
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Описание
AA 2198 is a modern aluminum-copper-lithium alloy (2.9–3.5% Cu, 0.8–1.1% Li) designed to replace 2024 in fuselage skin applications. It offers a density reduction of approximately 3–4%, improved fatigue crack growth resistance, and good corrosion resistance compared to older Al-Cu alloys. The alloy is used in commercial aircraft fuselage skins, floor panels, and lower wing skin panels.