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# Thermal Expansion - Superficial i.e. Area

## Superficial i.e area temperature expansion - online calculator

The amount by which unit area of a material increases when the temperature is raised by one degree is called the coefficient of superficial (i.e. area) expansion. Superficial thermal expansion can be expressed as

dA = A0 γ (t1 - t0)                                 (1)

where

dA = change in area (m2)

A0 = initial area (m2)

γ = superficial expansion coefficient (m2/m2K)

t0 = initial temperature (oC)

t1 = final temperature (oC)

### Online Superficial Thermal Expansion Calculator

A0 - initial area (m2)

γ - superficial expansion coefficient (m2/m2K)

t0 - initial temperature (oC)

t1 - final temperature (oC)

Change in area (dA): (m2)

Final Area (A1): (m2)

In general the superficial temperature coefficients can be approximated to

γ  ~= 2 α

where

α =  linear temperature expansion coefficient (m/m K, m/m oC)

#### Linear Temperature Coefficients - α - of some common metals

• aluminum : 0.000023 (m/m oC)
• steel: 0.000016 (m/m oC)
• copper: 0.000017 (m/m oC)

## Tag Search

• en: thermal temperature expansion superficial coefficient calculator formula equation

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## Citation

• Engineering ToolBox, (2008). Thermal Expansion - Superficial i.e. Area . [online] Available at: https://www.engineeringtoolbox.com/superficial-thermal-expansion-d_1380.html [Accessed Day Mo. Year].

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