Force is a function of the material thickness, the spring temper
, the amount of deflection, and the bend radius.
Due to spring temper
and the material used, the same size springs can vary considerably in strength.
Using high quality steels like 4120 alloy allows the head to be heat treated in a manner called "differential heat treating," meaning the chopping face and spike are hardened while the middle body is a softer, spring temper
. This way, you get the maximum edge holding qualifies and shock resisting, durability.
* The linear springs are a continuous wave formed wire length produced from spring tempered
You will not be easily pleased, and in the spring tempers
could flare because of frustrations at work.