Took a look at the copper zinc phase diagram to see where the 70/30 cu-zn alloy went to liquid phase … 1680 degrees F . Is anybody knowledgeable regarding the combining of 70/30 brass with another element which would reduce the melting temperature to a suitable level to allow casting and also retain the higher density of the brass ( specific gravity of 8.3) ? A ternary alloy is the correct name; I believe, for a three element alloy. Could tin or lead or possibly antimony be added to the molten brass to reduce the melting point of the resulting alloy a significant amount? If the metallurgical engineering majors view this as a question with an intuitively obvious answer I humbly apologize for my ignorance.