COMPOSITION OF METALS USED IN INDIAN COINS

(i) Gold (1835-1918) 91.7% or 22 Carat.

(ii) Standard Silver (1835-1939) 91.7%SiLver+8.3% Copper.

(iii) Silver Alloy (1939-1945) 50%Silver+ 40%Copper+ 5%Nickel+ 5%Zinc.

(iv) Silver Alloy (1969-71) 80%Silver+ 15%Copper+ 5%Nickel.

(v) Silver Alloy (1972-2002) 50%Silver+40% Copper+ 5%Nickel+5%Zinc.

(vi) Copper (1835-1906) Pure Copper.

(vii) Bronze (1906-64) 95-97% Copper+ 4%-21/2%Tin+1.00%;0.50%Zinc.

(viii) Copper-Nickel (1906-2002) 75%Copper+ 25%Nickel.

(ix) Nickel Brass (1964-71) 79%Copper+ 20%Zinc+ 1%Nickel.

(x) Nickel (1946-1974) Pure Nickel.

(xi) Aluminum (1965-93) 96%Aluminium+4% Magnesium.

(xii) Aluminum Bronze (1969-71) 92% Copper+ 2%Nickel+6%Aluminium.

(xiii) Stainless Steel (1988-2002) Ferritic Stainless Steel (Iron 83%,Chromium17%)

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