[TheForge] Spring steel (and other) breaking in mild acid

[xlch58 at swbell.net]

On 8/26/2011 1:46 PM, peter fels wrote:
> Would that be sufficient to cleve used tool steel with a mild acid?
> Not talking about just added embrittlement.
> Always wondered about the steel tanks containing pressurized  hydrogen too.
> Familiar with it in welding.
>
>
Springs often are conditioned during manufacture so that they have 
residual compressive stresses so that their fatigue limit is raised.    
Bearings also have residual stress added in manufacturing as well.

Charles