Show Casting Precious Metals N In casting gold and silver temperatures temperatures temperatures tem tem- running about 1600 degrees degrees degrees de de- de- de grees Fahrenheit are used These temperatures create a considerable considerable considerable consider consider- able problem in materials for the mold boxes as most metals oxidize oxidize oxidize dize at such great heats Recently Recent Recent- ly an alloy of nickel and chromium chromium chromium chro chro- has been chosen as the material material material ma ma- for these boxes because it resists destructive oxidation until untila a a. thermometer reading of 1950 degrees degrees degrees de de- de- de grees is re reached ched |