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Bureau of Mines / Minerals yearbook metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)

Sutton, Joseph A.
Columbium and tantalum,   pp. 461-471 ff. PDF (1.2 MB)


Page 464

464 MINERALS YEARBOOK, 1972' As reported by source.Source:Tantalum Producers
Association. 
and amounted to less than 1% of the FeCb, FeTa-Cb, and other columbium and
tantalum materials consumed. Stainless and heat-resisting steel continued
to be the major end-use categories for FeTa—Cb. 
 Consumption of other tantalum and columbium materials was about 5% of the
total FeCb, FeTa-Cb, and other columbium and tantalum materials consumed.
Superalloys remained as the major end-use category for other tantalum and
columbium -materials. 
 American Metal Climax Inc. acquired the assets of the former General Electric
Refractory Metals Center in Cleveland, Ohio. The 85,000-square-foot facility
contains a variety of plate, sheet, strip, and foil rolling equipment for
mill products of molybdenum, tungsten, zirconium, columbium, and tantalum,
as well as superalloys.2 
 Fansteel Inc. phased out its tantalum roiling operations in Baltimore, Md.,
and moved them -to its North Chicago, Ill., plant in an effort to improve
efficiency. 
The Metals Division of the Norton Co., 
a producer of tantalum powders and mill products, made plans to market tantalum
carbide powders.3 
 IN—657, a new nickel alloy, was developed in *the Birmingham research
laboratory of International Nickel Co. The new nickel alloy, containing 50%
chromium and 1.5% columbium, combines great strength and resistance to corrosion
at high temperatures. The recent development of 
large sheets of thin-gage tantalum coupled with new welding techniques and
explosion-bonding methods of cladding have made it possible for the chemical
industry to use tantalum in large pressure vessels. Such vessels are to be
used in the M. W. Kellogg Kel-Chlor process to recover chlorine -from byproduct
hydrogen chloride.4 
 Nickel-copper-columbium alloy steels, developed by the International Nickel
Co., provided new avenues of approach in the design and fabrication of complex
high structures.5 One unique example of this occurred -in the construction
of mobile cranes. The use of these low-carbon nickel-containing ferritic
steels made it possible to design a relatively lightweight unit that provides
excellent long-reach performance for the telescopic boom section of the crane.
 Single and -double sling chain made entirely from Carpenter No. 20 Cb—3
stainless steel was reported to have a longer service life in sulfuric acid
pickling operations than chains made from the 300 series stainless steels.6
 2 Metals Week. Climax Buying GE Tungsten and Molybdenum Plant. V. 43, No.
48, Nov. 27, 1972, p. 6. 
 ' American Metal Market. Tantalum Carbide Powders: Norton. V. 80, No. 60,
Mar. 27, 1973, p. 10. 
 Chemical Week. New Look in Tantalum Cladding. V. 3, No. 25. Dec. 29, 1972,
p. 29. 
 ' American Metal Market. Nickel-Copper-Columbium Alloy Steels Providing
New Designs, Structures. V. 79, No. 144, Aug. 4, 1972, p. 10. 
 ' American Metal Market. Term Carpenter 20 Cb—3 Good Corrosion Fighter.
V. 79, No. 214, Nov. 22, 1972, p. 9a. 
Table 5.—Reported shipments of columbium and tantalum materials 
(Pounds of metal content) 
Material 1971 1972 
% change 
Columbium products: 
 Compounds, including alloys 689,550 925,200 Metal, including worked products
270,500 101,900 All other 6,800 62,800 
 Total 966,850 1,08l~900 
Tantalum products: 
 Oxidesandsalts 60,900 54,900 Alloy additive 48,800 43,000 Carbide 135,000
146,900 
+34.2 
—62.3 +823.5 
+12.7 
—9.9 
—11.9 +8.8 
Powderandanodes 398,700 540,700Ingot (unworked consolidated metal) 42,400
1 —1,900Mill products 223,300 246,400 
+35.6 
- - 
+10.3 
Scrap 52,400 58,100 
Other -- 300 
+10.9 
-~ 
Total 961,500 1,088,400 
+13.2 


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