Iron-Nickel-Chrome-Silicon-Alloy

Abstract

Iron-nickel-chromium-silicon alloy having (in % by weight) 34 to 42% nickel, 18 to 26% chromium, 1.0 to 2.5% silicon, and additives of 0.05 to 1% Al, 0.01 to 1% Mn, 0.01 to 0.26% lanthanum, 0.0005 to 0.05% magnesium, 0.01 to 0.14% carbon, 0.01 to 0.14% nitrogen, max. 0.01% sulfur, max. 0.005% B, remainder iron and the usual impurities resulting from the production process.

1 . An iron-nickel-chromium-silicon alloy comprising, in % by weight, 34 to 42% nickel, 18 to 26% chromium, 1.0 to 2.5% silicon, and further comprising, as additives; 0.05 to 1% Al, 0.01 to 1% Mn, 0.01 to 0.26% lanthanum, 0.0005 to 0.05% magnesium, 0.01 to 0.14% carbon, 0.01 to 0.14% nitrogen, no more than 0.01% sulfur, no more than 0.005% B, remainder being iron and the usual impurities resulting from the production process. 
   
   
       2 . The alloy of  claim 1 , wherein the nickel content is 34 to 39% by weight. 
   
   
       3 . The alloy of  claim 1 , wherein the nickel content is 34 to 38% by weight. 
   
   
       4 . The alloy of  claim 1 , wherein the nickel content is 34 to 37% by weight. 
   
   
       5 . The alloy of  claim 1 , wherein the nickel content is 37 to 38% by weight. 
   
   
       6 . The alloy  claim 1  wherein the chromium content is 20 to 24% by weight. 
   
   
       7 . The alloy of  claim 1 , wherein the chromium content is 21 to 24% by weight. 
   
   
       8 . The alloy of  claim 1  having wherein the a silicon content is 1.5 to 2.5% by weight. 
   
   
       9 . The alloy of  claim 1 , wherein the silicon content is 1.0 to 1.5% by weight. 
   
   
       10 . The alloy of  claim 8 , wherein the silicon content is 1.5 to 2.0% by weight. 
   
   
       11 . The alloy of  claim 8 , wherein the silicon content is 1.7 to 2.5% by weight. 
   
   
       12 . The alloy of any one of  claim 1 , wherein the silicon content is 1.2 to 1.7% by weight. 
   
   
       13 . The alloy of any one of  claim 1 , wherein the silicon content is 1.7 to 2.2% by weight. 
   
   
       14 . The alloy of  claim 8 , wherein the silicon content is 2.0 to 2.5% by weight. 
   
   
       15 . The alloy of  claim 1 , wherein the aluminum content is 0.1 to 0.7% by weight. 
   
   
       16 . The alloy of  claim 1 , wherein the manganese content is 0.1 to 0.7% by weight. 
   
   
       17 . The alloy of  claim 1 , wherein the lanthanum content is 0.01 to 0.2% by weight. 
   
   
       18 . The alloy of  claim 17 , having a lanthanum content of 0.02 to 0.15%. 
   
   
       19 . The alloy of  claim 17 , having a lanthanum content of 0.04 to 0.15%. 
   
   
       20 . The alloy of  claim 1 , having a nitrogen content of 0.02 to 0.10% nitrogen. 
   
   
       21 . The alloy of  claim 1 , having a nitrogen content of 0.03 to 0.09%. 
   
   
       22 . The alloy of  claim 1 , having a carbon content of 0.04 to 0.14% 
   
   
       23 . The alloy of  claim 22 , having a carbon content of 0.04 to 0.10%. 
   
   
       24 . The alloy of  claim 1 , having a magnesium content of 0.001 to 0.05%. 
   
   
       25 . The alloy of  claim 24 , having a magnesium content of 0.008 to 0.05%. 
   
   
       26 . The alloy of  claim 1 , having no more than 0.005% sulfur and no more than 0.003% B. 
   
   
       27 . The alloy of  claim 1 , further comprising, by weight, 0.0005 to 0.07% Ca. 
   
   
       28 . The alloy of  claim 27  further comprising, by weight, 0.001 to 0.05% Ca. 
   
   
       29 . The alloy of  claim 28  further comprising, by weight, 0.1 to 0.05% Ca. 
   
   
       30 . The alloy of  claim 1  further comprising, by weight, as additive, 0.01 to 0.3%, in total, of at least one of the elements Ce, Y, Zr, Hf, Ti. 
   
   
       31 . The alloy of  claim 30  wherein the sum PwE=1.43·X Ce +1.49·X La +2.25·X Y +2.19·X Zr +1.12·X Hf +4.18X Ti  is less than or equal to 0.38, PwE is the potential of the effective elements and X is the number corresponding to the percentage content of the element identified in the respective subscript. 
   
   
       32 . The alloy of  claim 31  wherein content, in total, of one or more of the elements selected from La, Ce, Y, Zr, Hf, and Ti wherein is 0.01 to 0.2% and the sum PwE=1.43·X Ce +1.49·X La +2.25·X Y +2.19·X Zr +1.12·X Hf +4.18·X Ti  is less than or equal to 0.36, PwE is the potential of the effective elements and X is the number corresponding to the percentage content of the element identified in the respective subscript. 
   
   
       33 . The alloy of  claim 32  wherein content, in total, of one or more of the elements La, Ce, Y, Zr, Hf, and Ti is 0.02 to 0.15% and the sum PwE=1.43·X Ce +1.49·X La +2.25·X Y +2.19·X Zr +1.12·X Hf +4.18·X Ti  is less than or equal to 0.36, wherein PwE is the potential of the effective elements and X is the number corresponding to the percentage content of the element identified in the respective subscript. 
   
   
       34 . The alloy of  claim 1  further comprising, by weight, 0.001 to 0.020% phosphorus. 
   
   
       35 . The alloy of  claim 34 , wherein the phosphorus content is 0.005 to 0.020% by weight. 
   
   
       36 . The alloy of  claim 1  further comprising, 0.01 to 1.0% by weight, in total, of one or more of the elements Mo, W, V, Nb, Ta, Co. 
   
   
       37 . The alloy of  claim 36  wherein content, by weight, in total, of one or more of the elements Mo, W, V, Nb, Ta, Co is 0.01 to 0.2%. 
   
   
       38 . The alloy of  claim 37  further comprising, 0.01 to 0.06% by weight, in total, of one or more of the elements Mo, W, V, Nb, Ta, Co. 
   
   
       39 . The alloy of  claim 38 , wherein the impurities comprise not more than 1.0% Cu, not more than 0.002% Pb, not more than 0.002% Zn, and not more than 0.002% Sn. 
   
   
       40 . An electrical heating element comprising the alloy in accordance with  claim 1 . 
   
   
       41 . An electrical heating element that requires good dimensional stability and low sagging, comprising the alloy in accordance with  claim 1 . 
   
   
       42 . A furnace comprising the alloy in accordance  claim 1 . 
   
   
       43 . An iron-nickel-chromium-silicon alloy comprising, in % by weight;
 34 to 42% nickel, 18 to 26% chromium, 1.0 to 2.5% silicon, and, as additives, in percent by weight,   0.05 to 1% Al,   0.01 to 1% Mn,   0.01 to 0.26% lanthanum,   0.0005 to 0.05% magnesium,   0.01 to 0.14% carbon,   0.01 to 0.14% nitrogen, the alloy further having   0.01 to 0.3% of at least one of Ce, Y, Zr, Hf, and Ti, wherein the sum
     PwE= 1.43 ·X   Ce +1.49 ·X   La +2.25 ·X   Y +2.19 ·X   Zr +1.12 ·X   Hf +4.18 ·X   Ti    
   
     is less than or equal to 0.36, PwE is the potential of the effective elements and X is the number corresponding to the percentage content of the element identified in the respective subscript,
 the alloy also having common impurities from the production process.