A356.2 (92.6% Al,7% ,0.4% Mg ) Aluminum Alloy
Description: A356 has very good casting and machining characteristics. Corrosion resistance is excellent and it has very good weldability characteristics. Mechanical properties are rated excellent. Typically this alloy is used in castings for aircraft parts, pump housings, impellers, high velocity blowers and structural castings where high strength is required. The fact that A356 has good castability makes it a logical choice for intricate and complex castings where lightweight, pressure tightness and excellent mechanical properties are needed.
| Typical Aluminum Alloys (a) | … | Resistance to Corrosion (b) | … | … | … | Typical Mechanical Properties | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AA | Former AA Designation | ASTM Spec. No. | Federal Spec. No. | SAE Alloy No. | Approx. Weight, lb./in.3 | General | Stress Corrosion Cracking | Relative Machinability (c) | Castability (k) | Weldability (Arc) (d) | Ultimate Tensile Strength, ksi (i) | Yield Strength Tension, ksi (e) (i) | Elongation, Percentage in 2 in. (Round Specimen, 1/2" Dia.) (f) (i) | Shear Strength, ksi (g) | Fatigue Endurance Limit, ksi (h) | Brinell Hardness (500-kg Load, 10-mm Ball) (j) |
| 356.0-T6 | 356 | B26 | QQ-A-601 | 323 | 0.098 | 2 | A | 4 | 1 | 2 | 33 | 24 | 3.5 | 26 | 8.5 | 70 |
| 356.0-T7 | 356 | B26 | QQ-A-601 | … | 0.098 | 2 | A | 4 | 1 | 2 | 34 | 30 | 2 | 24 | 9 | 75 |
| A356.0-T6 | A356 | … | … | … | 0.098 | 2 | A | 4 | 1 | 2 | 37 | 27 | 5 | 20 | 8.5 | 80 |
| Designations & nominal compositions of common aluminum alloys used for sand casting | |||||||
|---|---|---|---|---|---|---|---|
| AA Number | Former AA designations | Former ASTM number | Cu | Mg | Mn | Si | Others |
| A356.0 | A356 | SG70B | 0.20 (Max) | 0.35 | 0.10 (Max) | 7.00 | 0.20 Fe (Max), 0.10 Zn (Max) |
| Characteristics of common aluminum alloys used in sand casting | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | Fluidity | Resistance to hot cracking | Pressure tightness | Heat Treatment | Strength at elevated temperatures | General corrosion resistance | Machining | Polishing | Anodizing Appearance | Weldability |
| A356.0 | 1 | 1 | 1 | Yes | 3 | 2 | 3 | 4 | 4 | 1 |
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