Mower decks live a hard life. Every time you mow, the deck and chute are battered by rocks, dirt, sand, and anything else hiding in your lawn. Fortunately, with the exception of plastic mower decks, many cracked mower decks are often repairable by welding. Most mower decks are made from mild steel, which is a relatively straightforward material for MIG welding. To avoid the costly task of replacement, welding is an increasingly popular solution to fix a damaged mower deck.