Elongation of CoCrMo: what is the difference between 5D and A5

[thedentist]

I am researching alloys used in dentistry, such as CoCrMo and NiCrMo. Some manufacturers describe elongation as 5D (%) and others as A5 (%). Are they the same? I am familiar with 5D but not A5. I have noticed that elongation when descibed as A5 seems to have a higher value for the same material? Help please?

 

[TVP]

The definition of A5 is the permanent extension of the gauge length after fracture, expressed as a percentage of the original gauge length L₀ where L₀ is taken equal to 5.65 x S₀ and S₀ is the initial cross-section of the test piece.