Flametal Valheim 1.0.20
Flametal is a material found in the Ashlands biome in Valheim. It is used to craft Flametal Breastplate and build Ashwood Door.
“According to legend, this metal was used by the gods themselves to craft powerful weapons.”
Flametal is a material. The game describes it as a metal that, according to legend, was used by the gods themselves to craft powerful weapons. Each piece weighs 12 and a stack holds up to 30. It can't be teleported.
You use Flametal to craft the Flametal Breastplate, Flametal Greaves, Robes of Embla, Berserkir Axes, Bleeding Berserkir Axes, Thundering Berserkir Axes, Primal Berserkir Axes, Ash Fang, Blood Fang and Storm Fang.
It is also a building material. You need it to build the Ashwood Door, Battering Ram, Bone Throne, Catapult, Flametal Beam and Flametal Gate.
Used to craft
Ash Fang, 
Ashen Cape, 
Asksvin Saddle, 
Berserkir Axes, 
Bleeding Berserkir Axes, 
Blood Fang, 
Bloodgeon, 
Brimstone, 
Brutal Slayer, 
Dundr, 
Dyrnwyn, 
Flametal Breastplate, 
Flametal Greaves, 
Flametal Helmet, 
Flametal Mace, 
Flametal Missile, 
Flametal Shield, 
Flametal Tower Shield, 
Jörmundling, 
Klossen, 
Nidhögg, 
Nidhögg the Bleeding, 
Nidhögg the Primal, 
Nidhögg the Thundering, 
Primal Berserkir Axes, 
Primal Slayer, 
Ripper, 
Robes of Embla, 
Root Fang, 
Root Ripper, 
Scourging Slayer, 
Slayer, 
Snow Shovel, 
Splitnir, 
Splitnir the Bleeding, 
Splitnir the Primal, 
Splitnir the Storming, 
Storm Fang, 
Storm Ripper, 
Storm Star, 
Thundering Berserkir Axes, 
Trollstav, 
Wound Ripper.
Used to build
Ashwood Door, Battering Ram, Bone Throne, Catapult, Flametal Beam, Flametal Gate, Flametal Pillar, Flametal Stack, Gem Cutter, Grausten Chest, Lava Lantern, Metal Cutter, Rolling Pins and Cutting Boards, Timberwood Drawbridge.
Other material items
Acorns, 
Amber, 
Amber Pearl, 
Ancient Bark, 
Ancient Coin, 
Ancient Metal, 
Ashlands Gourmet Bowl, 
Ashwood, 
Asksvin Bladder, 
Asksvin Hide, 
Asksvin Neck, 
Asksvin Pelvis.