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Tungsten Alloy for Tank System

Tungsten Alloy for Tank System

Place of Origin : China
Brand Name : CHENTIAN
Model Number : 016
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Tungsten Alloy for Tank SystemProblems, however, plagued the MBT-70 NBC system program from the beginning. Difficulties with English-German translations, metric to English measurement conversions, and differences between German and American manufacturing and designing practices caused considerable headaches before the first tanks were even designed. Most of the new systems were still experimental and this led to massive cost overruns and delays. Also the joint nature of the program led to disagreements about design features.
From 1965 to 1972, the US Army conducted a parallel development program for the 152mm XM578 cartridge, which was co-developed with the prototype MBT-70 Main Battle Tank. The XM578 cartridge used a tungsten alloy that was slightly denser than the British alloy, consisting of 97.5 percent tungsten and 2.5 percent binder, which had a density of 18.5 gm/cc. In response to the new operational requirements, military developers evaluated a succession of metal alloys. Initially, the British government developed a higher density tungsten alloy consisting of 93 percent tungsten and 7 percent binder tungsten alloy (WA). The new WA alloy had a density of 17 gm/cc -- versus 13 gm/cc for tungsten carbide.
Unfortunately, rising costs and technical problems caused the partners to go their separate ways. Trials began in 1968 and problems resulted in further delays and cost overruns. By 1969 the vehicle cost 5 times what was projected and as a result Germany backed out of the project. The MBT-70 NBC system was finally halted in January 1970. The same fiscal year (1971-72) witnessed the termination of two major weapons procurement programs, one for the Cheyenne advanced attack helicopter and the other for the MBT-70 NBC system. Although Army leaders saw both weapons systems as critical to the Army's long overdue modernization program, they were unable to convince the Department of Defense and Congress of a need for these weapons commensurate with their costs. The joint effort with the Federal Republic of Germany, under which the MBT-70 NBC system had been developed, was modified to a co-operative program in the middle of Fiscal Year 1970.
The XM803, the successor to the abortive MBT-70 project, was intended to modernize the armored force. Concerned about expense, Congress withdrew funding for the XM803 in December 1971, thereby canceling the program, but agreed to leave the remaining surplus of $20 million in Army hands to continue conceptual studies. This resulted in the German Leopard II and the US M1 Abrams. The Leopard 2's power pack was originally designed for the German prototype of the MBT-70 NBC system. In 1973, cooperation between these two projects led to the adoption of the German 120mm smoothbore gun by the US.

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