Chromium

Real Metals · Uncommon · Modern

The element responsible for the shine of stainless steel and chrome plating, chromium is also what gives rubies their red color and emeralds their green. Its name comes from the Greek word for color, chroma.

Identity

Symbol
Cr
Atomic number
24
Source
Natural element
Used in
Inconel, Stainless Steel
Aliases
Cr

Physical Properties

Appearance
Brilliant steel-grey, mirror-like when polished, maintains shine indefinitely
Luster
Metallic
Density
7.19 g/cm³
Melting point
1907 °C
Boiling point
2671 °C
Lighter
Zinc
Denser
Cast Iron
Magnetism
Non-magnetic
Electrical conductivity
Medium

Mechanical Properties

Mohs hardness
8.5
Tensile strength
690 MPa
Softer
Starmetal
Harder
Darksteel
Workability
Difficult
Brittleness
Brittle
Malleability
Low
Ductility
Low

Chemical Properties

Corrosion resistance
very high
Reactivity
low

Lore & Narrative

Chrome plating became a symbol of modernity and prosperity in the 20th century. The gleaming chrome of American cars in the 1950s was as much a cultural statement as an engineering choice, a mirror finish that said the future was bright.

Notable uses
Stainless steel, chrome plating, pigments, leather tanning
Forge uses
alloys, plating, pigments
Worldbuilding traits
reflective, colorful, modern, corrosion-resistant

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