I don't think that's steel, the corrosion doesn't look right and maps more closely to sterling silver imho. The handle and blade appear to be from the same material and one piece, which makes me think cast not forged. So I think you're right.

Hard to tell but it also appears to not be sharp and have never been bevelled to hold an actual edge.

I am just a weird nerd who likes tools and steel in an amateur way though so apply hypertensive amounts of salt.