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Thank you for the replies, Specify the material to suppress microbial growth is a great idea..the only issue I see here is the corrosive properties of an alloy with high Cu or Silver. Having an alloy with 65% of these elements concerns me, should I be concerned? Maybe since the saline solution...

Hi Eng-Tip users, For a small passion project I would like to machine a contact lense case, since I am a long-time user of contact lenses and use up a lot of disposable cases. I figured S/ST 316 would be best for this based on its properties and cost, but I have stumbled on the question on...

Guys, Thank you for your responses. Much appreciated. Has certainly gave me food for thought and some solid advice. Have a good weekend! Matt

Hi Eng-Tips Users, We have had some difference of opinions in the office and i would like to put a question of 2 parts to you guys. If/when you are/were designing a piece of equipment, how do you select the materials to use? Do you have any hard and fast rules? There are some obvious examples...