Copper Axe is 9 Copper Bars and 3 Wood
Iron Axe is 9 Iron Bars and 3 Wood
Silver Axe is 9 Silver Bars and 3 Wood
Gold Axe is 9 Gold Bars and 3 Wood
War Axe of the Night is 10 Demonite Bars
Meteor Hamaxe is 35 Meteorite Bars
Molten Hamaxe is 35 Hellstone Bars
Here's a table http://wiki.terrariaonline.com/Axe
