Iron-Nickel-Chrome-Silicon-Alloy

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.