The invention relates to a heat-resistant, hot-workable austenitic nickel alloy comprising (in % by weight) Carbon 0.05 to 0.15 Silicon 2.5 to 3.0 Manganese 0.2 to 0.5 Phosphorus max. 0.015 Sulphur max. 0.005 Chromium 25 to 30 Iron 20 to 27 Aluminium 0.05 to 0.15 Calcium 0.001 to 0.005 Rare earths 0.05 to 0.15 Nitrogen 0.05 to 0.20 the remainder being nickel and conventional smelting-related impurities.
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