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Alloy Specifications, Chemistries, and Technical Data

C355.0 Aluminum
Aliases
ANSI AA NUMBER C355.0
Common Name C355
UNS Designation A33550
Nearest Applicable Casting Standards
ASTM (B Series) B26
Federal (QQ-C- Series) 601e
Military (Mil-C- Series) 21180c
Specification Composition
Minimum Maximum
Silicon (Si) 4.5 5.5
Iron (Fe) 0.2
Copper (Cu) 1 1.5
Manganese (Mn) 0.1
Magnesium (Mg) 0.4 0.6
Zinc (Zn) 0.1
Titanium (Ti) 0.2
Other (Total) 0.15
Specification Properties
(Heat Treat 'F' Denotes As Cast) Heat Treat State Minimum
Tensile Strength (ksi) T6 36
Yield Strength (.5% extension under load) (ksi) T6 25
Elongation (2 inch gauge length) (%) T6 2.5
Typical Properties
Heat Treat State Typical
Compressive Yield Strength (ksi) 90
Density (lb/cu.in. @ 68F) .098
Electrical Conductivity (% IACS @ 68F) 39
Thermal Conductivity (cal/sec/sq cm/cm/C @ 25C) 0.36
Coefficient of Thermal Expansion (per F @ 68-212F) 12.4
Coefficient of Thermal Expansion (per F @ 68-572F) 13.7
Melting Range (Liquidus-Solidus)(F) 1015-1150
Resistance to Hot Cracking E
Pressure Tightness E
Fluidity E
Solidification Shrinkage Tendency E
Strength at Elevated Temperatures VG
Corrosion Resistance G
Machinability G
Polishing G
Gas Welding E
Arc Welding E
Brazing No
Normally Heat Treated Yes
Annodizing Appearance Gray
Applications
Aircraft Fittings
Airframe Castings
Body
Case For Push Button
Connecting Rod
Crank Case
Electric Motor Parts
End Cover
Engine Blocks
Engine Parts
Flywheel Housings
Gear Housing
Handhold Cover
Housing
Impellers
Jet Engine Compressor Cases
Knob
Missile Components
Rear Axle Housings
Retangle Block
Starwheel Lever
Transmission Cases
Valve Body
Water Jackets
Great Castings
         St. Paul Foundry 954 Minnehaha Ave West St. Paul MN 55104 651-488-5567 www.stpaulfoundry.com
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St. Paul Foundry
954 Minnehaha Avenue West
Saint Paul, Minnesota 55104
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Alloy Guide Sheet Terms of Use

Use Good Design Principles

1. St. Paul Foundry is providing this information on metal characteristics for informational purposes only. Before making a final decision on alloy selection consider the following and all other appropriate design and specification principles. Please note that this is not an exhaustive list.

2. Consult the appropriate specification from an accredited specifying body (ASTM, SAE, Federal or Military) to determine current minimum values of this alloy.

3. Use appropriate design safety factors.

4. Use Failure Modes and Effects Analysis to help identify possible weaknesses in designs and specifications.

5. Use computerized stress analysis tools.

6. Use appropriate certification requirements for your casting suppliers. These may include test bars, chemical certifications, radiography, dye penetrant or other non-destructive testing methods.

7. Test your design to failure in a controlled environment. Then test it to failure in a simulation of its end use.

8. You and you alone are responsible for the suitability of your design and the materials that you select.

Disclaimer

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