You can get a replacement for free if you lose your card, but you may not need to get a replacement since knowing your social security number is what's important.
The easiest way to apply for a replacement is if you have an my Social Security account. Do you?
I don't.
Do you want to create one?
Not right now.
Unfortunately, no relevant information is found.
What if I can't get one of the required documents?
In that case, we'll ask you for another suitable document. The submitted documents must be current, not expired and show your name, identifying information, date of birth and, preferably, a recent photograph.
It is good to know, and regarding the original documents that I need, what can I do if I do not have these documents and do not have a valid replacement for them?
Do you have the Employee Identification Card?
yes
then you can prove your identity with the US Passport.
and if the document is expired?