Steel bar

A Steel bar is a bar of steel. It can be created through the Smithing skill at level 30 by using an iron ore and 2 pieces of coal on a furnace, granting 17.5 Smithing experience, or by using the magic spell Superheat Item.

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Uses
A steel bar can be forged on an anvil to create steel weapons and armour, granting 37.5 Smithing experience per bar used. A list of steel items that can be smithed from steel bars and the Smithing levels required can be found here.

Steel bars are also used in construction and earn 20 experience per bar.

Players who own a dwarf multicannon will also need steel bars (along with an ammo mould in the inventory) to make cannonballs, which are tradeable and thus can be bought also for around 252 coins. Use a steel bar on a furnace to make four cannonballs per steel bar, giving 25.6 Smithing experience per bar.

Steel bars can be a very good F2P money-making method, depending on the price of the steel bar compared to its raw materials at the Grand Exchange. This method can a profitable way to train free-to-play Smithing of level 30+.

Players commonly use steel bars to train the Smithing skill, despite being able to smith mithril bars or better, because it has the optimum traits of requiring only three ores, and gives a decent amount of experience. However, those looking for experience should smelt silver bars as silver bars only need one ore, so a whole inventory of silver ore will give you 380 experience when smelted, while a whole inventory of the steel bar ingredients (1 iron ore, 2 coal) only gives you 157.5 experience. It takes 25 seconds to make a full load of 9 iron and 18 coal into 9 steel bars. With coal bag you can make even more bars in one run increasing the experience per hour greatly (36 coals and 18 iron ores becomes 18 steel bars)

Steel bars can also be used to make Clockworks on a Crafting table 2 with level 8 Crafting for 15 experience.

It is one of the most popular metal bar being smelted as it was able to give 200+ profit per bar even with superheat smelting. After free trade returned the price of steel bar return to balance and this method is no longer possible.

Steel bars are also the tertiary ingredient in infusing Steel minotaur pouches.

This item is a 100% drop from Steel dragons, five at a time.

Trivia
Near January and February of 2011, the Free Trade update significantly dropped the price of steel bars, making smithing a very good method of money-making for a short while. However, the price of steel bars rose up again to its consistent price soon after.