Nimonic

Nimonic

 

the generic name for a group of nickel-based heat-resistant alloys that contain chromium, titanium, and aluminum. They were first developed in Great Britain (by the Mond Nickel Company, 1941–42), where several types of nimonics are being produced. The alloys may contain 10–21 percent Cr, 0.2–4.0 percent Ti, and 0.5–6.0 percent Al, depending on their purpose. Nimonics are also alloyed with cobalt (up to 22 percent), molybdenum (up to 6 percent), and other elements. The melting point of the alloys is 1310°–1390°C, depending on chemical composition. The better grades of nimonics are usable at temperatures up to 1000°C. The alloys lend themselves satisfactorily to hot pressure shaping and, to a lesser degree, to cold working. They are manufactured in the form of forgings, rods, sheets, and tubing and are being used for parts of gas-turbine engines and rockets. Soviet analogs of nimonics are types KhN55VMTFKIu and KhN80TBIu; American analogs are called inconels.

REFERENCES

Betteridge, W. Zharoprochnye splavy tipa nimonik. Moscow, 1961. (Translated from English.)
Khimushin, F. F. Zharoprochnye stali i splavy, 2nd ed. Moscow, 1969.

L. L. ZHUKOV

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