Historically, chainmail was invented as a flexible armor, protecting against cuts, but it was ineffective against thrusts (and arrows) and blunt trauma which led to its supplementation and eventual replacement by plate armor. As weapons shifted towards firearms, metal armor in general became less useful.

This site will contain chainmail jewelry and some decorative things, but very little armor.
Can I make armor? Yes.
Will I make armor? Not unless I have good reason to.

Chainmail is created from rings interlocking in specific patterns called weaves. Due to its complexity, chainmail is almost exclusively made by hand.

 

Materials used here:

Material
Description
Aluminum
Lightweight, good weight-strength ratio. Can be anodized to bright colors.
Brass
Golden hue, heavy, soft.
Bronze
Darker brown-gold. Heavy. Harder than brass.
Copper
Copper(!) colored. Somewhat soft.
Gold fill
14k gold composing 20% of the wire. (Much better than "gold-plated")
Neoprene
Not a metal. Stretchy rubber-stuff. Colorful.
Silver
Sterling and argentium sterling (argentium is incredibly tarnish-resistant.) Half-hard.
Steel
Mild, stainles, galvanized, blackened, etc. Heavy, strong.
Titanium
Lightweight, very strong, can be anodized for colors.