Metal Badge Materials: Zinc Alloy vs. Iron vs. Brass
Custom metal badges are usually made from one of three base materials: zinc alloy, iron or brass. The material determines how fine the detail can be, how heavy the badge feels, and how much it costs.
Zinc alloy is the most common choice for die-cast badges. It fills complex molds well, reproduces fine detail and sharp edges, and plates evenly. It is softer than steel, which makes it easier to machine and cast, and it works well with soft or hard enamel filling. Most enamel pins and challenge coins are zinc alloy.
Iron is harder and stronger than zinc alloy. It is often used for stamped badges and metal keychains where strength matters. Iron badges can be plated in gold or silver, but they are heavier and the base metal can rust if the plating is damaged, so a protective coating is recommended.
Brass is a copper-zinc alloy with a warm, slightly golden color that works well with an antique or polished finish. It is used for premium bookmarks, luggage tags and commemorative items. Brass is more expensive than zinc alloy or iron and is often selected when the natural metal look is part of the design.
How to choose: if your design needs fine cast detail and enamel color, start with zinc alloy. If the item must be strong and lightweight cost matters, iron is a common alternative. If you want a premium natural-metal appearance, brass is the option to evaluate. Final selection also depends on your supplier's process capabilities and is confirmed during quotation.