I found this 1947 Canadian maple leaf and I believed it to be nickel because that's what I keep seeing but it sticks to a magnet so I believe it might be still only I can't find anything on. Anyone know anything about it?
Nickel itself is magnetic. The the reason US "nickel" coins don't stick to a magnet is because they're actually 75% copper. The Canadian 5-cent coins have a purer nickel content, so they do.
It would be unlikely that it is steel given that the switch back to 100% nickel was in 1946. As @lordmarcovan mention nickel is highly magnetic and is in fact how we tell a 1968 Silver coin from a nickel coin.
It isn't. Nickel is magnetic. Copper isn't, but it is the reason US "nickel" coins (which are actually 75% copper) don't stick to a magnet. There ya go.