Nickel chromium alloy
AssigneeSchmidt + Clemens GmbH + Co. KG
InventorsDietlinde Jakobi, Peter Karduck, Alexander Freiherr Von Richthofen
Life of this patent
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Abstract
A nickel chromium alloy comprising 0.4 to 0.6% carbon, 28 to 33% chromium, 15 to 25% iron, 2 to 6% aluminum, up to 2% silicon, up to 2% manganese, up to 1.5% niobium, up to 1.5% tantalum, up to 1.0% tungsten, up to 1.0% titanium, up to 1.0% zirconium, up to 0.5% yttrium, up to 0.1% nitrogen, and nickel, has a high oxidation and carburization stability, long-term rupture strength and creep resistance. This alloy is particularly suited as a material for components of petrochemical plants and for parts, for example tube coils of cracker and reformer furnaces, pre-heaters, and reformer tubes, as well as for use for parts of iron ore direct reduction plants.
Claims19
A nickel-chromium alloy, comprising:
- 0.4 to 0.6% carbon by weight,
- 28 to 33% chromium by weight,
- 17 to 22% iron by weight,
- 3 to 4.5% aluminum by weight,
- 0.01 to 1% silicon by weight,
- 0.01 to 2% manganese by weight,
- 0.01 to 1.0% niobium by weight,
- 0.01 to 0.6% tungsten by weight,
- 0.001 to 0.5% titanium by weight,
- 0.001 to 0.3% zirconium by weight,
- 0.001 to 0.3% yttrium by weight, and
- 0.001 to 0.1% nitrogen by weight,
- remainder nickel with melt-induced impurities.
A nickel-chromium alloy, comprising:
- 0.4 to 0.6% carbon by weight,
- 28 to 33% chromium by weight,
- 17 to 22% iron by weight,
- 3 to 4.5% aluminum by weight,
- 0.01 to 1% silicon by weight,
- 0.01 to 2% manganese by weight,
- 0.01 to 1.0% niobium by weight,
- 0.01 to 0.5% molybdenum by weight,
- 0.001 to 0.5% titanium by weight,
- 0.001 to 0.3% zirconium by weight,
- 0.001 to 0.3% yttrium by weight, and
- 0.001 to 0.1% nitrogen by weight,
- remainder nickel with melt-induced impurities.
A nickel-chromium alloy, comprising:
- 0.4 to 0.6% carbon by weight,
- 28 to 33% chromium by weight,
- 17 to 22% iron by weight,
- 3 to 4.5% aluminum by weight,
- 0.01 to 1% silicon by weight,
- 0.01 to 2% manganese by weight,
- 0.01 to 1.0% niobium by weight,
- 0.01 to 0.5% tantalum by weight,
- 0.001 to 0.5% titanium by weight,
- 0.001 to 0.3% zirconium by weight,
- 0.001 to 0.3% yttrium by weight, and
- 0.001 to 0.1% nitrogen by weight,
- remainder nickel with melt-induced impurities.
A nickel-chromium alloy, comprising:
- 0.4 to 0.6% carbon by weight,
- 28 to 33% chromium by weight,
- 17 to 22% iron by weight,
- 3 to 4.5% aluminum by weight,
- 0.01 to 1% silicon by weight,
- 0.01 to 2% manganese by weight,
- 0.01 to 1.0% niobium by weight,
- 0.001 to 0.5% titanium by weight,
- 0.001 to 0.3% zirconium by weight,
- 0.001 to 0.3% yttrium by weight,
- 0.001 to 0.1% nitrogen by weight, and
- nickel with melt-induced impurities.
Dependencies are inferred from the claim text.