It can definitely go another chain. I wouldn't change a steel sprocket until 3 or 4 chains have gone through it. More if it looks good. My current set is on it's 2nd chain with no issues.
However, I'm pretty sure someone's going to chime in and say that if you don't replace both sprockets and the chain all at once, you're bike is going to set on fire, crash into an orphanage, and explode.