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How to Get Steel Fiber in Warframe (2026): Where It Drops, Stats and Is It Worth It
Steel Fiber adds 100% Armor at max rank (rank 10), doubling your base armor
Last Updated on September 30, 2026
The short answer
Steel Fiber is a common warframe mod: Steel Fiber adds 100% Armor at max rank (rank 10), doubling your base armor. Kill Tyl Regor for a 25.81% drop, or run the Level 10 to 30 Cetus Bounty where the reward table gives it at 25%.
Reviewed September 30, 2026, current through Update 44 (Iceblade of Narin). Stats are max rank from the live game data, drop chances from the official drop tables, vendors confirmed on two sources; this page is re-checked after every major patch.
| Mod facts | |
|---|---|
| Slot | Warframe |
| Rarity | Common |
| Polarity | Vazarin (D) |
| Drain at max rank | 14 (rank 10) |
| At max rank | +100% Armor |
| Fastest route | Kill Tyl Regor for a 25.81% drop, or run the Level 10 to 30 Cetus Bounty where the reward table gives it at 25%. |
Table of Contents
The card
Tap it to unfold the full card at max rank.
14
Steel Fiber
Steel Fiber
+100% Armor
WARFRAME
Where it drops
Official drop table, best chance first.
| Where | Chance | Rarity |
|---|---|---|
| Tyl Regor | 25.81% | Uncommon |
| Earth/Cetus (Level 10 – 30 Cetus Bounty), Rot A | 25% | Uncommon |
| Earth/Cetus (Level 10 – 30 Cetus Bounty), Rot A | 15.97% | Uncommon |
| Earth/Cetus (Level 10 – 30 Cetus Bounty), Rot A | 15.32% | Uncommon |
| Mercury/Apollodorus (Survival), Rot B | 7.69% | Rare |
| Venus/V Prime (Survival), Rot B | 7.69% | Rare |
| Venus/Malva (Survival), Rot B | 7.69% | Rare |
| Venus/Kiliken (Excavation), Rot B | 7.69% | Rare |
| Earth/Everest (Excavation), Rot B | 7.69% | Rare |
| Earth/Tikal (Excavation), Rot B | 7.69% | Rare |
| Mars/Arcadia (Survival), Rot B | 7.69% | Rare |
| Mars/Augustus (Excavation), Rot B | 7.69% | Rare |
Every other way to get it
| Source | How | Chance |
|---|---|---|
| Transmutation | Random result when you transmute four common mods | Random |
Cheat sheets that run it
Tips that save runs
- Vitality: health plus armor is the classic tanky pair.
- Frames with 100 or more base armor, where the percent has real numbers to work on.
- Valkyr and other high-armor frames.
- Armor mods add together and then multiply your base armor.
- The Armor page shows that 600 armor blocks about two thirds of damage.
Mistakes that waste runs
- Slotting it on a low-armor frame and expecting much.
- Expecting it to protect against armor stripping.