https://vanillawowdb.com/?search=fire+hardened https://vanillawowdb.com/?search=fire+hardened

There are the full rewards for this quest. They are fairly impressive, but you might need quite a bit of help for completing the quest in the first place. The Hauberk is especially impressive, but a Shining Silver Breastplate can be used if you'd rather not brave the dangers of collecting those items. =)

Q1: Fire Hardened Mail

1. https://vanillawowdb.com/?item=6838 Scorched Spider Fang (x50)=https://vanillawowdb.com/?npc=1111 Leech/https://vanillawowdb.com/?npc=4040 Cave Stalker@https://vanillawowdb.com/?maps=11:540640 Wetlands (54,64)
2. https://vanillawowdb.com/?item=6839 Charred Horn (x12)=https://vanillawowdb.com/?npc=4032 Young/https://vanillawowdb.com/?npc=4031 Fledgling Chimaera@https://vanillawowdb.com/?maps=406:33874731274929072627570026667128867330667332667334567336367336... Stonetalon Mountains (33,72)
3. https://vanillawowdb.com/?item=6840 Galvanized Horn=https://vanillawowdb.com/?npc=6167 Chimaera Matriarch@https://vanillawowdb.com/?maps=406:33874731274929072627570026667128867330667332667334567336367336... Stonetalon Mountains (33,72)
4. https://vanillawowdb.com/?item=6841 Vial of Phlogiston=https://vanillawowdb.com/?npc=6168 Roogug@Razorfen Kraul (On the first split road, make a left. It should be in a small room.)

Edited my post and fixed the Fledgling -> Matriarch entry. ;)

Followups after getting the Fire Hardened Mail:

Human: https://vanillawowdb.com/?quest=1705 Burning Blood for https://vanillawowdb.com/?item=6971 Fire Hardened Coif
Dwarf & Gnome: https://vanillawowdb.com/?quest=1708 Iron Coral for https://vanillawowdb.com/?item=6974 Fire Hardened Gauntlets
Night Elf: https://vanillawowdb.com/?quest=1710 Sunscorched Shells for https://vanillawowdb.com/?item=6973 Fire Hardened Leggings

The race tags on the above is just which NPC Furen will send you to after he gives you your armor. The other two NPC's will give you their quest if you locate them manually, so you can get an (almost) full set of Fire Hardened if you are willing to run to them and do their errands.

About Draenei, it seems they don't get a note from Furen to give to one of the other smiths. But the quests should get unlocked anyway. The Human smith is around the corner from Furen so it is a quick check for a curious Draenei.:)

dont be daunted by the 50 fangs. They have a 100% drop rate and most of the time you will get 2 fangs from one spider.

I have confirmed that draeni warriors can get these quests by talking to the respective quest givers. Grabbed them all at 31.

You can accept the beginning of this questline at level 20,but it strongly suggests to be done at level 30. Reason being is you'll travel to the corners of the world where most of the mobs needed for this quest are near level 30. This quest can be completed in any manner you desire. Needless to say there is no order to aqcuire any of these items. However I'll list the format I used along with some Tips that I'd reccomend considering.
[ Tip ]: Before you embark on your Journey,switch your hearth to Stormwind temporarily. It'll make this quest much more easier

Step 1.)
Begin by flying to Thelsamar,assuming you have the Flight Path already. You will then want to travel down to Thelgen Rock which is relatively close near the network of tunnels leading down to The Wetlands. Once you see cluttering spiders engage in combat and begin looting Fangs.
[ Tip ]: Activate https://vanillawowdb.com/?spell=20230 Retaliation and pull about 2-3 spiders at a time. In theory you should gather more fangs this way :)

Step 2.)
Immediately after your done hearth back to Stormwind and go to the Harbor. Find the wharf that is decorated in Night Elf architecture and wait for the boat. This boat leads to Auberdine now,evidently taking this will bring you closer to Stonetalon Mountains. Once you've arrived in Auberdine fly to Astranaar,once again assuming you have this Flight Path already. If not a quick stroll to this town won't take long.
[ Tip ]: On your way to Astranaar,stop by Grove of the Ancients and do the quest https://vanillawowdb.com/?quest=5321 The Sleeper Has Awakened from Kerlonian Evershade. This is fast exp and it follows the road to Astranaar.

Step 3.)
Now pass by Astranaar and go southeast until you reach a tunnel called Talondeep Path. It's a very obvious landmark in the side of the mountain. https://vanillawowdb.com/?zone=331 Picture. You'll exit out of the path into Windshear Crag,Stonetalon Mountains. Avoid the mobs and run to the major road. Follow it until theres several forks at Mirkfallon Lake. Go to the road guarded by Rogue Flame Spirits. Keep going until you reach The Charred Vale. Your objective now is to kill Chimaeras in this area and take their Horns.
[ Tip ]: The Chimaera Matriarch wanders the southern Hemisphere of the Vale or if you look on your map she dwells underneath the words ""The Charred Vale"". Watch out for Harpies too!

The Final Step
You now have every item besides the https://vanillawowdb.com/?item=6841 Vial of Phlogiston. This is the most difficult portion of the quest as it takes place in an Instance in Horde Territory. It really doesn't get any more agonizing than that. If you can,find a group for Roogug or for a full run. You could also whisp a friend to give you a quick run through. Ultimately this is pretty straight forward. Kill the Boss,loot the vial then undoubtedly your Hearth to Stormwind should be ready. If it isnt and you have a gathering profession you could run around increasing your skill more.
[ Tip ]: If by coincidence,you have some quests for RFK it'd be best to do a full run of the Instance. A full run could also occupy time for your Hearth to reactivate. Above all watch out for Horde on a PvP server! If you get caught in this situation take advantage of your Racial Abilities ;)

Enjoy your new https://vanillawowdb.com/?item=6972 Fire Hardened Hauberk!