 | United States. Congress. Senate. Committee on Public Lands - 1947 - 410 páginas
...in the steel industry and 5 percent in the manufacture of dry batteries and chemicals. There are no satisfactory substitutes for manganese in its important...domestic production averaged only 30,000 tons. Under the stimulus of high prices and lower specifications, domestic production has increased appreciably during... | |
 | United States. Congress. Senate. Committee on Interior and Insular Affairs - 1947 - 406 páginas
...in the steel industry and 5 percent in the manufacture of dry batteries and chemicals. There are no satisfactory substitutes for manganese in its important...apparent consumption of manganese ore was approximately 075,000 long tons, whereas domesticproduction averaged only 30,000 tons. Under the stimulus of high... | |
 | United States. President's Committee on Foreign Aid - 1947 - 314 páginas
...magnesium substitutes for other metals is not believed to present a serious problem. VIII. Manganese The United States depends largely on imports for its supply of manganese ore, about 10 percent of the internal requirements being obtained from domestic sources. Mineralogical occurrences... | |
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... than that of iron, manganese is added to the molten metal to facilitate the removal of these objectionable impurities from steel. About 95 percent of the manganese consumed in the United States is used in the steel industry and 5 percent in the manufacture... 