Alloys of the 200 series contain copper as the principal alloying element, and are particularly useful for elevated temperature applications.
A201.0 is a high-strength, heat-treatable Al-Cu-Ag casting alloy. In the T7 (overaged) temper, it possesses high strength, moderate ductility and optimum resistance to stress-corrosion cracking. Refer to Section 3.1.3.4 for comments regarding the weldability of the alloy.
A material specification covering this alloy is presented in Table 3.8.1.0(a). Room-temperature mechanical and physical properties are presented in Table 3.8.1.0(b). The effect of temperature on thermal expansion is shown in Figure 3.8.1.0.
| Specification | Form |
|---|---|
| AMS-A-21180 | Casting (T7 temper) |
The temper index for A201.0 is: Section 3.8.1.1 covers the T7 temper.
Table 3.8.1.0(b) — Design Mechanical and Physical Properties of A201.0 Aluminum Alloy Casting — pending digitization (dense multi-column property table; MIL-HDBK-5J p. 3-487).
Figure 3.8.1.0. Effect of temperature on the thermal expansion of A201.0 aluminum alloy casting.
Figure 3.8.1.1.6 presents a typical tensile stress-strain curve. Strain-control fatigue data are shown in Figures 3.8.1.1.8(a) through (c).
Figure 3.8.1.1.6. Typical tensile stress-strain curve for A201.0-T7 aluminum alloy casting, designated area, at room temperature.
Figure 3.8.1.1.8(a). Best-fit strain-life (ε/N) curves, cyclic stress-strain curve, and mean stress relaxation curve for A201.0-T7 casting at 75°F.
Figure 3.8.1.1.8(b). Best-fit strain-life (ε/N) curves, cyclic stress-strain curve, and mean stress reduction curve for A201.0-T7 casting at 200°F.
Figure 3.8.1.1.8(c). Best-fit strain-life (ε/N) curves, cyclic stress-strain curve, and mean stress relaxation curve for A201.0-T7 casting at 350°F.