01-05-2005, 10:09 PM
"What I'd be interested in is the production of orichalcum. Is that easier to make than iron? "<br>
From a coin website "In 23 B.C. Augustus reformed the aes so that fractional denominations were struck in two metals orichalcum or brass (75% copper; 20% zinc; 5% tin) and pure copper. "<br>
Compare with modern brass "Leaded Red Brass is known for its wear resistance, moderate strength, good castability, easy machining (Index of 84) , good corrosion resistance, and interesting appearance. Red Brass is probably the most widely cast brass composition. It is popular for ornamental fixtures because of its deep reddish color. The material is composed of approx. 85% Copper, 5% Lead, 5% Tin, and 5% Zinc. Try 2150 F as a pouring temperature. "<br>
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IIRC Mike Bishop talked in an earlier thread that the ancient alloys were different, but that clever modern forgers melted down Roman orichalcum coins to make an "authentic" helmet.<br>
Any metal-workers/ metallurgists out there who can answer Jasper's question as to whether brass or iron is easier to manufacture? <p></p><i></i>
From a coin website "In 23 B.C. Augustus reformed the aes so that fractional denominations were struck in two metals orichalcum or brass (75% copper; 20% zinc; 5% tin) and pure copper. "<br>
Compare with modern brass "Leaded Red Brass is known for its wear resistance, moderate strength, good castability, easy machining (Index of 84) , good corrosion resistance, and interesting appearance. Red Brass is probably the most widely cast brass composition. It is popular for ornamental fixtures because of its deep reddish color. The material is composed of approx. 85% Copper, 5% Lead, 5% Tin, and 5% Zinc. Try 2150 F as a pouring temperature. "<br>
<br>
IIRC Mike Bishop talked in an earlier thread that the ancient alloys were different, but that clever modern forgers melted down Roman orichalcum coins to make an "authentic" helmet.<br>
Any metal-workers/ metallurgists out there who can answer Jasper's question as to whether brass or iron is easier to manufacture? <p></p><i></i>
