Material note · Ferrous metal
Iron
Central to forging traditions and capable of strong, expressive transitions in section and texture.

Where it appears
Forged chains, gates, tools, fasteners and architectural work.
Limits to remember
Moisture and salts can promote corrosion; scale and welds need informed inspection.
Care principle
Keep water traps out of the design and maintain the specified protective system.
A note on identification
Color and texture alone do not prove composition. A real project should use documentation, suitable testing and a qualified professional when material identity affects safety, joining, conservation or structural use.
This page gives qualitative context. It does not state engineering values, certify compatibility or prescribe a treatment.
- Victoria and Albert Museum — Metalworking Techniques ↗
Museum-led context for forming, casting and decorating metal.
- Copper Development Association — Architectural Applications ↗
Reference on copper-alloy weathering, surface color and care.