Which of the following is used in large amount to make ferrous and non-ferrous alloys ?

Options

A. Cu
B. Ni
C. Cr
D. Mn

Answer

B

Explanation

Because of similar radii and other characteristics, alloys are readily formed by transition metals. Most of the Ni produced is used to make ferrous and non-ferrous alloys. Ni improves the strength of steel and its resistance to chemical attack. Stainless steel may contain `12 - 15%`. Ni and steel for cutlery contains `20%` Cr and `10%` Ni. Very strong permanent magnets are made form 'Alnico' steel (Fe, N AI, Co and Cu). Monel metal (Cu, Ni, Fe, Mn, Si and C) is very resistant to corrosion and is used in apparatus to handle `F_(2)` and other corrosive fluorides. It contains `68%` Ni, `32%` Cu and traces of Fe, Mn Si and C. Several non-ferrous alloys are important. The Nimonic series of alloys (`75%` Ni, with or, Co, AI and Ti) are used in gas turbine and jet engines where they are subjectected to high stress and high temperatures. Other such as Hastelloy are used for their corrosion resistance. Nichrome contains `60%` Ni and `40%` Cr and used to make the wire which gest red hot in electrical radiators. Cupro-nickel (`80%` Cu and `20%` Ni) is used to make 'silver' coins. The so called 'nickel-silver' contains roughyl `60%` Cu, `20%` Ni and `20%` Zn. This is used to make imitation silver articles and can be electroplated on other metals to give (electroplated nickel-silver). The name nickel silver is confusing as it contains no Ag.