Gathering brings in the raw goods. Refining makes the common materials from them, and refining a common one again with an additive makes the uncommon ones. Production takes them from there.

Gathered

Common

Uncommon

Constantan Ingot

Uncommon metal, refined from Copper Ingot with Nickel Ore by Smelting at level 30 (recipe).

One Constantan Ingot takes 8 Copper Ore, 2 Nickel Ore, and 4 Chunk of Coal.

Refined further into:

Production takes it, or its forms, in 61 Blacksmithing, 1 Alchemy, and 2 Carpentry recipes.

What it adds to gear parts made from it:

  • Dagger Blade, Hand Axe Blade, Longsword Blade, Mace Head, Shortsword Blade, Spear Head, Trident Head, and War Hammer Head: +3 Melee and Ranged Damage, +1% Spell Critical Chance, +1% Spell Damage
  • Two-handed Hammer Head, Two-handed Mace Head, Two-handed Sword Blade, Halberd Blade, and Two-handed Axe Blade: +5 Melee and Ranged Damage, +2% Spell Critical Chance, +2% Spell Damage
  • Coil of Metal Wire and Metal Sheet: +1% Base Melee and Ranged Damage, +5 Focus
  • Metal Binding: +0.2% Base Melee and Ranged Damage, +5 Focus
  • Metal Hilt: +20 Focus