Requires in a forge:
Has a 40% (base) chance of success. (max 100% @ Lv 100 Forging)
The Best Way to ObtainEdit
The best place you can craft Steel Bars is to use the Mining Guild.
The second best way to obtain the components is by mining the Coal from Rakblood's Town and go to Rakblood's Coal Vein. You may need to defeat 2 Bronze Golems blocking the road between Rakblood Town and the Coal Vein. If you are not high enough Combat Level to avoid Aggro, you will need to fight up to 8 Bronze Golems (assuming bad path finding) and 1 Iron Golem (2 if going for the non-vein Coal)
Remember that some pets give you up to 16 storage slots.