The frequent AV rendering (e.g. Deut. 8: 9) is incorrect and probably copper is meant, which became bronze (as 1 Sam. 17: 5) when alloyed with tin. NRSV and REB use ‘brass’ for the metaphorical sense (of unyielding hardness) in Isa. 48: 4, while NJB prefers ‘bronze’.