You can get level 80 in smithing by training the skill. Some good ways to train the skill are:
Making gold bars with gold smith gauntlets (you can get them from the family crest quest.
Making bars in a clan citadel
making metal arrowheads
Making burial armor in the artisans workshop
These are a few good ways to get smithing exp. to level up to 80.
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A Godsword is created by smithing together the Godsword Shard 1, Godsword Shard 2, Godsword Shard 3 (blade is made from these 3 shards) and the hilt with level-80 Smithing.
37224xp is required for 40 smithing
easy just buy coal and iron from the grand exchange then smith it to steel bars sell them for 550each and there you are high smithing experience and more money made! For members: http://gameolosophy.com/games/online/runescape/runescape-how-to-make-money-and-train-smithing-fast I made the article just copy and paste it and open it.
You can make them provided you have the smithing level, or you can buy form the Bob in Lumbridge, near the castle.
HiSo You want To Know How to Make Iron Bar, Well All you need is a Iron Ore, These Can be Maintained from Many Mining Places Like South-East Varrock There is Many Rocks you can get Iron Ore from, Ok, Now to The Smelting Part, You need a Smithing of 15 Once your 15 There is a 50% Change of it Becoming a Bar, Then Level 16 Will make it 51% Etc, Until 45 when Its 80% and it will Always be successful Good Luck smithing