You will be better off either buying them for making them.
Steel bars, Mithril bars, Adamantite bars, and Runite bars.
2000 steel bars.
Building a steel range requires at least 34 Construction and 6 Steel bars.
To create Steel bars, you will need x2 Iron Ore and x1 Coal in your inventory. While at a furnace, you will be able to combine the ores and smelt Steel bars. There is no individual ore in RuneScape that creates steel, so you'll have to gather both Iron ore and Coal. Unlike Iron, you will have a 100% success rate while smelting these bars. ;)
You will need approximately 859 Steel Bars. --------- Items Needed: - 859x Iron ore - 1718x Coal ------
i would have to say mining the coal and then iron and making steel bars, because you should only spend your money on coal if you have lots of money or if your not gonna make that much steel bars buy the coal so that it will save you time, if you ever want to Private Message me In game my names: Daerkkness. ~daerkknessoflight~ PCE
By Gold bars of course!!!
Steel companies make steel bars in circles
Steel companies make steel bars in hexagons
Steel companies make steel bars in ovals
Steel companies make steel bars in squares
You must do the dwarven cannon quest, so you can buy the cannonball mold. Then all you need is the mold and steel bars. Which you then smelt together.