The metals used in the Temple and Tabernacle have symbolic meanings for the Levitical priesthood (the priests of Israel descended from Levi). What does bronze (or brass… they’re often used interchangeably. One is copper and tin. The other is copper and zinc) mean, Levitically speaking?
Bronze is an interesting metal. It can sustain high heat. Because of the ability to withstand extreme temperatures, bronze is a symbol for judgment. Things you read about in the Temple or Tabernacle that relate to cleansing or judging sin – like the bronze lavers, the molten sea (actually like a huge bronze “bathtub”), and the altar – are made of bronze. When God told Moses to put a bronze snake on a stick and stick it on the hill, that represented sin (the snake) judged (made of bronze).