Many ironman guides have you picking up iron bar spawns in the wilderness for quests but that can be dangerous, just pick up this spawn during a quest youll be doing anyway. :
Iron bar - OSRS Wiki
P2P OSRS Noob Moneymaking Method [~128k/hr] - Iron Bar Smelting - YouTube
F2P Money Making Guide! Making Iron Bars! EP14! (OSRS) - YouTube
Where is the iron bar spawn in wildy?? : r/2007scape
Iron bar.stl - 3D model by longleovo2009 on Thangs
Bronze bar | Old School RuneScape Wiki | Fandom
Iron platebody | Old School RuneScape Wiki | Fandom
Getting 99 Smithing While Profiting
Steel bar - OSRS Wiki
Grab And Download Silver Icon - Iron Bar Transparent Background, HD Png Download - vhv