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An example of DZR brass is the C352 brass, with about 30% zinc, 61–63% copper, 1.7–2.8% lead, and 0.02–0.15% arsenic. The lead and arsenic significantly suppress the zinc loss. [20] "Red brasses", a family of alloys with high copper proportion and generally less than 15% zinc, are more resistant to zinc loss.
Iron was plentiful back then and allowed smaller nations in Greece to arm themselves with weapons that were lighter and stronger than copper. Bronze was still used but rare because of how hard it was to find tin, and therefore the weapons of ancient Greece were made of iron and copper. This would help them in the Greco-Persian Wars. [citation ...
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Bell bronze is a two-phase alloy, meaning some of the tin is not dissolved in the copper grains but exists between them. This makes the metal harder and more brittle than a single-phase alloy, and also affects the way the metal responds to hardening by hammering and lathing, and greatly restricts the use of mechanised techniques of manufacture.
Cannon made of bell metal at Malik-e-Maidan, Bijapur, India. Bell metal or bell bronze is an alloy used for making bells and related instruments, such as cymbals.It is a form of bronze with a higher tin content than most other bronzes, usually in approximately a 4:1 ratio of copper to tin (typically, 78% copper, 22% tin by mass).
Second, the alloy is capable of greater work-hardening than is the case with pure copper, so that it performs better when used for cutting or chopping. An increase in work-hardening capability arises with an increasing percentage of arsenic, and the bronze can be work-hardened over a wide range of temperatures without fear of embrittlement. [1]
Aluminium bronzes are alloys of copper and aluminium. The content of aluminium ranges mostly between 5% and 11%. Iron, nickel, manganese and silicon are sometimes added. They have higher strength and corrosion resistance than other bronzes, especially in marine environment, and have low reactivity to sulphur compounds.
Bronze weapon from the Mesara Plain, Crete. Copper came into use in the Aegean area near the end of the predynastic age of Egypt about 3500 BC. The earliest known implement is a flat celt, which was found on a Neolithic house-floor in the central court of the palace of Knossos in Crete, and is regarded as an Egyptian product.