CHROME NICKEL ALUMINIUM ALLOY WITH GOOD MACHINABILITY, CREEP LIMIT PROPERTIES AND CORROSION RESISTANCE PARAMETERS Russian patent published in 2016 - IPC C22C19/05 C22F1/10 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to chrome nickel aluminium alloy. Alloy contains the following, wt %: more than 25-33 of chromium, from 1.8 to less than 3.0 of aluminium, from 0.10 to less than 2.5 of iron, 0.001-0.50 of silicon, 0.005-2.0 of manganese, 0.00-0.60 of titanium, by 0.0002-0.05 of each of the magnesium and/or calcium, 0.005-0.12 of carbon, 0.001-0.050 of nitrogen, 0.0001-0.020 of oxygen, 0.001-0.030 of phosphorus, max. 0.010 of sulfur, max. 2.0 of molybdenum, max. 2.0 of tungsten, the rest is nickel and common caused by process impurities. For alloy the following conditions are met: Cr+Al≥28 and Fp≤39.9, where Fp=Cr+0.272×Fe+2.36×Al+2.22×Si+2.48×Ti+0.374×Mo+0.538×W-11.8×C, and Cr, Fe, Al, Si, Ti, Mo, W, C designate concentration of corresponding elements in % by weight.

EFFECT: enabling higher high-temperature corrosion resistance, high creep limit and processibility.

24 cl, 4 dwg, 5 tbl, 1 ex