hard bronze

hard bronze

[′härd ¦bränz]
(metallurgy)
A high-tensile-strength alloy containing 88% copper, 7% tin, 3% zinc, and 2% lead.
References in periodicals archive ?
In the flesh, so to speak, you get dramatic confirmations or contradictions of what you expect in terms of the relationships between the pieces, and--as you say--they are incredibly palpable, which is so weird given how solid and hard bronze is.
This could range from hard bronze to powdered metal to bi-metal (1018 steel on one side, bronze on the other).