STAINLESS STEEL FREE OF NICKEL Russian patent published in 2017 - IPC C22C38/18 

FIELD: metallurgy.

SUBSTANCE: invention relates to the stainless alloy based on the basis of iron and chromium, used for jewelry and watch parts production. The alloy contains wt %: nickel: less than 0.5, chromium: from 16 to 20, at least one additional metal with the total content from 30 to 40. Moreover, at least one mentioned additional metal is selected from the first group, including the ruthenium, rhodium, palladium, rhenium, osmium, iridium and platinum, as well as copper and gold. The copper content is from 0 to 2 and the gold content is from 0 to 2, carbon: from 0 to 0.03, molybdenum: from 0 to 2, manganese: from 0 to 2, silicon: from 0 to 1, nitrogen: from 0 Up to 0.1, tungsten: 0 to 0.5, vanadium: 0 to 0.5, niobium: 0 to 0.5, zirconium: 0 to 0.5, titanium: 0 to 0.5, iron and unavoidable impurities: up to 100. The alloy has the austenitic face-centered cubic structure.

EFFECT: provision of the required protective properties of the products manufactured from the alloy, while reducing the allergenic effect of nickel.

9 cl, 2 dwg