[Tcoat]

Originally Posted by ZDan

I appreciate that there must be some misunderstanding. But to be clear, it isn't just that there are "other" parameters involved, the fact is that "mass of steel" tells you *absolutely nothing* about spring rate. If you have two springs and one weighs more than the other, without more info you cannot know which one is stiffer. Heavier could be stiffer, or it could be softer.

Sure but how do you try to shill your product if you have to actually understand all the other factors?