Brittleness in Pure Iron 0 0 This article was originally published with the title “ Brittleness in Pure Iron ” in SA Supplements Vol. 84 No. 2185supp ( November 1917 ) , p. 307 doi: 10.1038 ...

When the copper is increased to make an alloy of 84-68 copper, and 15-32 tin, the brittleness is removed, and the alloy is very hard ; it is as compared with cast iron at 1,000, -916 in hardness.