3.9.7.0
Comments and Properties — D357.0 is a modification of A357.0 with narrower compositional limits and more stringent inspection requirements. These modifications were necessary to reduce variability in mechanical properties to a degree compatible with the determination of A- and B-basis values. D357.0 is a heat-treatable Al-Si-Mg alloy generally used for premium quality castings in which special properties are developed by careful control of casting and chilling techniques. It has excellent casting characteristics and provides high strength together with good toughness. The alloy also has excellent corrosion resistance. Refer to Section 3.1.3.4 for comments regarding the weldability of the alloy.
A material specification for D357.0 aluminum is presented in Table 3.9.7.0(a). Room temperature mechanical and physical properties are shown in Table 3.9.7.0(b).
Table 3.9.7.0(a). Material Specification for D357.0
Aluminum Alloy
| Specification | Form |
|---|---|
| AMS 4241 | Casting |
The temper index for D357.0 is as follows: Section: 3.9.7.1 Temper: T6
3.9.7.1
T6 Temper — Figure 3.9.7.1.6 presents a typical tensile stress-strain curve.