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.

Free software

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