3.9.4.0 Comments and Properties — 356.0 is among the easiest of alloys to cast by a variety of techniques. It is heat treatable, has intermediate strengths, and has high resistance to corrosion. Refer to Section 3.1.3.4 for comments regarding the weldability of the alloy.
Material specifications for 356.0 aluminum alloy are presented in Table 3.9.4.0(a). Room-temperature mechanical and physical properties are shown in Table 3.9.4.0(b). The effect of temperature on thermal expansion is given in Figure 3.9.4.0.
| Specification | Form |
|---|---|
| AMS 4284 | Permanent mold casting |
| AMS 4217 | Sand casting |
| AMS 4260 | Investment casting |
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| Specification | AMS 4217 | AMS 4260 | AMS 4284 |
|---|---|---|---|
| Form | Sand casting | Investment casting | Permanent mold casting |
| Temper | T6 | T6 | T6 |
| Location Within Casting | Thick and thin areas | As specified | As specified |
| Basis | S | S | S |
| Mechanical Properties: | |||
| Ftu, ksi | 22a,b | 25a | 25a |
| Fty, ksi | 15a,b | 16a | 16a |
| Fcy, ksi | 15 | 16 | 16 |
| Fsu, ksi | 14 | 16 | 16 |
| Fbruc, ksi: | |||
| (e/D = 1.5) | 38 | 43 | 43 |
| (e/D = 2.0) | 47 | 53 | 53 |
| Fbryc, ksi: | |||
| (e/D = 1.5) | 24 | 25 | 25 |
| (e/D = 2.0) | 28 | 30 | 30 |
| e, percent | 0.7a,b | 1a | 0.7a |
| E, 103 ksi | 10.3 | ||
| Ec, 103 ksi | 10.3 | ||
| G, 103 ksi | 3.85 | ||
| μ | 0.33 | ||
| Physical Properties: | |||
| ω, lb/in.3 | 0.097 | ||
| C, Btu/(lb)(°F) | 0.23 (at 212°F) | ||
| K, Btu/[(hr)(ft2)(°F)/ft] | 88 (at 77°F) | ||
| α, 10-6 in./in./°F | See Figure 3.9.4.0 | ||
- a Conformance to tensile property requirements is determined by testing specimens cut from casting only when specified on drawing.