ALUMINUM a356.2

CATEGORY: Metal / Ingot 356.0

F- As Cast.

T6: Solution Heat Treat, Quench and Artificially Age: heat treatment such as this usually results in maximum tensile strength with adequate elongation. These properties are stabilized though aging.

MACHINABILITY: After heat treatment (notably in the T6 condition), Alloy 356.0 has good machinability. Savings can be realized by using carbide-tipped cutting tools (or better) because of the high silicon content. Rakes should be positive and high. Speeds should approach the maximum, and light cuts should be taken.

FINISHING: Alloy 356.0 has good polishing characteristics. It is excellent for electroplating and very good for chemical conversion coatings. Anodizing appearance is very good; the colour is gray.

WELDABILITY: Very good welding characteristics are shown by Alloy 356.0 for all standard welding methods. The alloy is not brazed.

CORROSION RESISTANCE: Excellent resistance to corrosion is shown. Chemical conversion coatings give further protection.

CHEMICAL COMPOSITION LIMITS

Component Si Cu Mg Ti Fe Mn Zn Al
Wt % 6.5-7.5 Max. 0.25 0.2-0.45 Max 0.25 Max. 0.6 Max. 0.35 Max. 0.1 93

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PHYSICAL PROPERTIES

356.0-F VALUE COMMENTS 356.0-T6 VALUES COMMENTS
Density, lb/cu in. 0.1 - Density, LB/cu in. 0.1 -
Hardness, Brinell - 500 kg load, 10 mm ball Hardness, Brinell 80 500 kg load, 10 mm ball

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MECHANICAL PROPERTIES

356.0-F VALUE COMMENTS 356.0-T6 VALUES COMMENTS
Tensile Strength, Ultimate, ksi. 26 - Tensile Strength, Ultimate, ksi 38 -
Tensile Strength, Yield, ksi 18 Set 0.2% Tensile Strength,Yield, ksi 27 Set 0.2%
Elongation %; break 5 In 2 inches Elongation%; break 5 In 2 inches
Shearing Strength, ksi - - Shearing Strength, ksi 30 -
Compressive Yield Strength, ksi - Set 02% Compressive Yield Strength, ksi 27 Set 0.2%

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THERMAL PROPERTIES

356.0-F VALUE COMMENTS 356.0-T6 VALUES COMMENTS
CTE, linear 20 deg. C, um/m-deg. C 21.4 20-100 deg. C CTE, linear 20 deg. C, um/m-deg.Ci 21.4 20-100 deg. C
CTE, linear 250 deg. C, um/m-deg. C 23.2 20-300 deg. C CTE, linear 250 deg. C, um/m-deg.Ci 23.2 20-300 deg. C
Thermal Conductivity, W/m-K 167 - Thermal Conductivity, W/Mk 151 -
Melting Point, deg. F 1035 Solidus Melting Point, deg. F 1035 Solidus
Solidus, deg. F 1035 - Solidus, deg. F 1035 -
Liquidus, deg. F 1135 - Liquidus, deg. F 1135 -

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ELECTRICAL PROPERTIES

356.0-F VALUE COMMENTS 356.0-T6 VALUES COMMENTS
Electrical Resistivity, Ohm-cm 0.000004 - Electrical Resistivity, Ohm-cm 0.0000044 -

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*REFERENCES:
1. The American Foundryman's Society, Inc.; "Aluminum Casting Technology", pp 50-77.
2. Metals Handbook Vol. 2 - Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM International 10th Ed. 1990.
3. ASM Metals Reference Book, Third edition, Michael Bauccio, Ed. ASM International, Materials Park, OH, 1993.