First, visit any trainer in the main cities of old Azeroth - just ask a guard, and learn Apprentice Blacksmithing.
50 x [Rough Grinding Stones] - 100 Rough Stone
Learn Blacksmithing Journeyman.
Save these.
12 x [Coarse Grinding Stones] - 24 Coarse Stones
Learn Blacksmithing Expert.
You should stop at 150 though if you reach that before making all 50, as the recipe goes grey at this point - then if you need all 50 later on make them at that point instead.
Learn Blacksmithing Artisan.
At skill level 200 and character level 40, Blacksmiths can choose to specialize as an Armorsmith or a Weaponsmith. Weaponsmiths can later further specialize into Hammer-, Axe- or Swordsmiths. All specialized armor and weapons are Bind on Pickup and can only be used by the blacksmith that made them. Most specialization recipes require difficult components, such as Primal Mights, Primal Nethers, and Nether Vortexes. If you want to read more about Blacksmith specialization, please visit these pages: Armorsmithing or Weaponsmithing.
Save these.
15 x [Solid Grinding Stone] - 60 Solid Stone
This recipe is sold by these NPCs. There is around 30 minutes respawn rate for the recipe, if someone bought it before you. Make [Steel Plate Helm] if you do not want to wait for the recipe to respawn.
15 x [Mithril Coif] - 150 Mithril Bar, 90 Mageweave Cloth
15 x [Thorium Bracers] - 120 Thorium Bar
Go to Outland and learn Blacksmithing Master.
Between 275-280, you can make [Arcanite Rods] and sell them at the Auction House. This way you will need 55 less [Thorium Bars]. The recipe is yellow, so it really depends on your luck, maybe you will only need to make 5 maybe 10. One [Arcanite Rod] costs around 18 gold to make if you buy the [Arcane Crystals] and find any Alchemist who transmute them into [Arcanite Bars]. The 55 [Thorium Bars] cost around 140 gold usually, but this way if you have to make only 5 [Arcanite Rod], you will end up around 90 gold spent, and you can also sell them for profit. I can usually sell them for around 70-80 gold, but you have to be patient because the demand for them isn't that big. Anyway this is a great way if you want to reduce the gold spent while you level your Blacksmithing, but if you want to level the profession faster and you don't really feel you are lucky or you are not really into selling things at the Auction House, you should just make the Bracers mentioned below.
15 x [Imperial Plate Bracers] 180 Thorium Bar
The recipe is a reward from this quest. - 10 Thorium Bar
10 x [Thorium Boots] - 120 Thorium Bar, 80 Rugged Leather
or
10 x [Thorium Helm] - 120 Thorium Bar, 10 Star Ruby
5 x [Fel Iron Breastplate] - 50 Fel Iron Bar
Go to Northrend and learn Blacksmithing Grand Master.
5 x [Cobalt Gauntlets] - 25 Cobalt Bar
Make these until 425. You can sell these at the auction house, so you will get most of your gold back.
Sell these at the Auction House too.
7 x [Titanium Weapon Chain] - 14 Saronite Bar, 7 Titanium Bar
15 x [Daunting Legplates] - 210 Saronite Bar, 15 Eternal Earth
I hope you liked this WoW Blacksmithing Guide, GZ to 450!