Steel is the most common material for spring washers due to its ease of process and its high tensile strength. Chrome vandium alloy is a higher quality steel with a good through-hardening capability; it is used to make very thick spring washers.
How to Prevent Swimmerâs Itch. Thereâs no cure-all to eliminate swimmerâs itch. The negative symptoms are, ironically, a problem of our own immune systemâs making, and short of abstaining from swimming altogether, thereâs a risk of getting swimmerâs itch in a Northern Michigan lake.
It depends on the type of surgery you've had, but you shouldn't go swimming until: 1  your surgeon, GP or physiotherapist has confirmed it's safe for you to do so. 2  your wound has healed (it shouldn't be submerged under water) â ask your surgeon how long your wound will take to heal.  your wound doesn't cause pain.