Any copper alloy was called brass by the KJV translators. Brass is the alloy of copper and zinc, a combination unknown in the ancient Near East. A common alloy was copper and tin—that is, bronze—and this is what is indicated by the Hebrew of the biblical text. Some modern translations retain brass where hardness or persistence in sin is in view (Leviticus 26:19;
Isaiah 48:4), but they use “bronze” as a translation elsewhere. See Bronze.
These dictionary topics are from the Holman Bible Dictionary, published by Broadman & Holman, 1991. All rights reserved. Used by permission of Broadman & Holman.
Butler, Trent C. Editor.. "Entry for 'BRASS'". "Holman Bible Dictionary".