AUSTENITIC IRON/NICKEL/CHROMIUM/COPPER ALLOY

摘要

The invention relates to an austenitic iron/nickel/chromium/copper alloy, the composition of which comprises in % by weight: 24% = Ni = 36%; Cr = 0.02%; Cu = 0.1%; Cu + Co = 15%; 0.01 = Mn = 6%; 0.02 = Si = 2%; 0 = Al + Ti = 3%; 0 = C = 2%; 0 = V + W = 6%; 0 = Nb + Zr = 0.5%; 0 = Mo = 8; Sn = 1; 0 = B = 0.006%; 0 = S + Se + Sb = 0.008%; 0 = Ca + Mg = 0.020%; the reminder being iron and impurities resulting from the smelting, the percentages of nickel, chromium, copper and cobalt being such that the alloy also meets the following conditions: Co < Cu; Co < 4% if Cr > 7.5%; Eq1 > 28% where Eq1 = Ni + 1.2 Cr + (Cu/5); Cr < 7.5% if Ni > 32.5%, and the manganese content also meeting the following conditions : if Eq3 = 205, Mn = Ni - 27.5 + Cu - Cr; if 180.5 = Eq3 = 205, Mn = 4%; if Eq3 = 180.5, Mn < 2% where Eq3 = 6Ni - 2.5X + 4(Cu+Co) and X = Cr+Mo+V+W+Si+Al.