Macro & Micro Tests?

[Fracball]

Hello:

I frequently see the terms “macro” and/or “micro” on material certification reports. What do these terms mean?

Are these terms related to a UT inspection?

Thanks in advance for the help,
Fracball

 

[Carburize]

They refer to optical examination of the material
Macro usually refers to examinations at magnifications up to about X10
Micro refers to examinations at higher magnifications - typically around x400.

 

[CWIC]

Macro is a term used to define magnification of 10X or less. Micro is used for maginification >10X, (typically 100X or more.)