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

WHILE EVERY EFFORT IS MADE BY ST. PAUL FOUNDRY (SPF) TO ENSURE ACCURACY, THIS INFORMATION IS PROVIDED FOR GENERAL INFORMATION PURPOSES ONLY AND NOT FOR ANY OTHER PURPOSE. BY ACCESSING THIS INFORMATION, YOU AGREE THAT IT MAY BE REVISED AT ANY TIME, IT IS PROVIDED “AS IS” AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, THAT NO WARRANTY OR REPRESENTATION IS MADE ABOUT ITS CONTENT OR SUITABILITY FOR ANY PURPOSE, AND THAT SPF EXPRESSLY DISCLAIMS WARRANTIES OF MERCHANTABILITY AND FITNESS. YOU ASSUME ALL RISK AND LIABILITY FOR ANY LOSS, DAMAGE, CLAIM, OR EXPENSE RESULTING FROM YOUR REVIEW, USE, OR POSSESSION OF THIS INFORMATION.



Skip Navigation Links242.0 Aluminum Copper Silicon
St. Paul
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Great Castings          St. Paul Foundry 954 Minnehaha Ave West St. Paul MN 55104 651-488-5567 www.stpaulfoundry.com

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ISO 9001:2008  

242.0 Aluminum
Aliases
ANSI AA NUMBER 242.0
Common Name 142
UNS Designation A02420
Nearest Applicable Casting Standards
ASTM (B Series) B26
Federal (QQ-C- Series) 601e
Military (Mil-C- Series) 21180c
Specification Composition
Minimum Maximum
Silicon (Si) 0.7
Iron (Fe) 1
Copper (Cu) 3.5 4.5
Manganese (Mn) 0.35
Magnesium (Mg) 1.2 1.8
Chromium (Cr) 0.25
Nickel (Ni) 1.7 2.3
Zinc (Zn) 0.35
Titanium (Ti) 0.25
Other (Total) 0.15
Specification Properties
(Heat Treat 'F' Denotes As Cast) Heat Treat State Minimum
Tensile Strength (ksi) F 27
Yield Strength (.5% extension under load) (ksi) F 18
Elongation (2 inch gauge length) (%) F 1
Tensile Strength (ksi) T571 32
Yield Strength (.5% extension under load) (ksi) T571 30
Elongation (2 inch gauge length) (%) T571 0.5
Tensile Strength (ksi) T61 32
Yield Strength (.5% extension under load) (ksi) T61 20
Tensile Strength (ksi) T77 30
Yield Strength (.5% extension under load) (ksi) T77 23
Elongation (2 inch gauge length) (%) T77 2
Typical Properties
Heat Treat State Typical
Coefficient of Thermal Expansion (per F @ 68-212F) 12.6
Coefficient of Thermal Expansion (per F @ 68-572F) 13.6
Melting Range (Liquidus-Solidus)(F) 990-1175
Resistance to Hot Cracking F
Pressure Tightness F
Fluidity G
Solidification Shrinkage Tendency F
Strength at Elevated Temperatures E
Corrosion Resistance F
Machinability VG
Polishing VG
Gas Welding F
Arc Welding F
Brazing No
Normally Heat Treated Yes
Annodizing Appearance Brownish Gray
Electroplating E
Compressive Yield Strength (ksi) F 18
Hardness (Brinell) (HB @ 500kg) F 70
Shear Strength (ksi) F 21
Endurance Limit (K ksi) F 8
Modulus of Elasticity (K ksi) F 10.3
Compressive Yield Strength (ksi) T571 34
Hardness (Brinell) (HB @ 500kg) T571 85
Shear Strength (ksi) T571 26
Endurance Limit (K ksi) T571 11
Modulus of Elasticity (K ksi) T571 10.3
Electrical Conductivity (% IACS @ 68F) T571 34
Thermal Conductivity (cal/sec/sq cm/cm/C @ 25C) T571 0.32
Hardness (Brinell) (HB @ 500kg) T61 105
Compressive Yield Strength (ksi) T77 24
Hardness (Brinell) (HB @ 500kg) T77 75
Shear Strength (ksi) T77 24
Endurance Limit (K ksi) T77 10.5
Modulus of Elasticity (K ksi) T77 10.3
Electrical Conductivity (% IACS @ 68F) T77 38
Thermal Conductivity (cal/sec/sq cm/cm/C @ 25C) T77 0.36
Applications
Food Handling
Manifolds
Ornamental Grills
Reflectors
Typewriter Frames
Valves - Bodies
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
(651) 488-5567  Fax: (651) 488-0908
Sales: (651) 312-4734 email

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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

WHILE EVERY EFFORT IS MADE BY ST. PAUL FOUNDRY (SPF) TO ENSURE ACCURACY, THIS INFORMATION IS PROVIDED FOR GENERAL INFORMATION PURPOSES ONLY AND NOT FOR ANY OTHER PURPOSE. BY ACCESSING THIS INFORMATION, YOU AGREE THAT IT MAY BE REVISED AT ANY TIME, IT IS PROVIDED “AS IS” AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, THAT NO WARRANTY OR REPRESENTATION IS MADE ABOUT ITS CONTENT OR SUITABILITY FOR ANY PURPOSE, AND THAT SPF EXPRESSLY DISCLAIMS WARRANTIES OF MERCHANTABILITY AND FITNESS. YOU ASSUME ALL RISK AND LIABILITY FOR ANY LOSS, DAMAGE, CLAIM, OR EXPENSE RESULTING FROM YOUR REVIEW, USE, OR POSSESSION OF THIS INFORMATION.