Iron

"Iron can be refined into Iron Alloy, which is used in the prototyping process for vehicles."

- In-game description

 is a raw resource in Foxhole used to progress your Faction in the weapon and equipment research.

Acquisition
It can be obtained by mining nodes on a Salvage Field where it occasionally spawns when a mined Salvage node splits. Note that you usually get a bigger node from the first Salvage node split. You can expect to gather around 200-300 raw on average per Salvage field, but the number can vary depending on outside parameters.

can also be obtained from mining Rare Resource Nodes.

Mining Nodes
Nodes can be mined with Hammers, Sledge Hammers or Harvesters. Like Aluminum the presence of is determined randomly as the Salvage Field respawns.

Purpose
can be refined into Iron Alloy in a Refinery. Alloy in turn can be used at an Engineering Center to research vehicle Prototype Kits.