In my accent (inland Cascadian English, in the northwestern United States), we say [sɑɾɚ], as "saw-der," to rhyme with "water." It looks like it should be pronounced [sɔldɚ] or similar, as "sole-der," to rhyme with "colder," and it may be pronounced that way elsewhere.

In my accent (inland Cascadian English, in the northwestern United States), we say [sɑɾɚ], as "saw-der," to rhyme with "water." It looks like it should be pronounced [sɔldɚ] or similar, as "sole-der," to rhyme with "colder," and it may be pronounced that way elsewhere.

And, yes, to make that perfectly clear: in my accent, solder rhymes with water. That seems so bizarre now that I really think about it.