Elongation
Cold forming math
Formula's to determine wire size, wire elongation, and area reduction.

Elongation percentage

The incoming wire diameter is calculated from the drawn wire diameter for a given elongation by:

Where:
Øin : incoming wire diameter [mm, inch]
Øout : drawn wire diameter [mm, inch]
E : wire elongation percentage [%]

Inversely, the drawn wire diameter is calculated from the incoming wire diameter with:

The elongation percentage can be calculated from the incoming and drawn wire diameter by using:


Area reduction percentage

The incoming wire diameter is calculated from the drawn wire diameter for a given area reduction by using:

Where:
Øin : incoming wire diameter [mm, inch]
Øout : drawn wire diameter [mm, inch]
A : wire area reduction percentage [%]

Inversely, the drawn wire diameter is calculated from the incoming wire diameter

The area reduction percentage can be calculated from the incoming and drawn wire diameter with the following formula:


Elongation versus area reduction

The relation between the elongation percentage and area percentage is

Where:
E : wire elongation percentage [%]
A : wire area reduction percentage [%]

See pictures to the right for a graphical representation of this relationship.


Wire elongation and area reduction related downloads

Free software

Free software that helps you do all the math in a few clicks.

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