If the application supplies no form of lubrication, then you probably need lubrication impregnated bearing material (often called oilite). SAE 840/841 oil
impregnated bronze is what you are looking for if that is the situation.
If you have lubrication present (such as water slipping past the shaft), then you can go with a straight bearing material. Alloy 485 navel brass is probably a good choice. Alloy 464 brass is also good, but harder to machine. Alloy 954 aluminum
bronze would probably be my top choice for wear resistance. Bronze alloys 360, 220, & 316 would also be good choices.