Krupp Vdm Gmbh

Vdm Nickel-technologie Aktiengesellschaft

Ulrich Brill

The invention relates to an austenitic-chromium-iron alloy and its use as a material for articles with high resistance to isothermal and cyclic high temperature oxidation, high heat-resistance and high creep rupture strength at temperatures above 1100 to 1200.degree. C. The characterizing feature of the invention is that the austenitic nickel-chromium-iron alloy consists (in % by weight) of:

Austenitic nickel-chromium-iron alloy

An austenitic carbide-strengthened nickel/chromium/iron foregeable alloy comprises (in % by weight) 0.2 to 0.4% carbon, 25 to 30% chromium, 8 to 11% iron, more than 2.4 to 3.0% aluminum, 0.01 to 0.15% yttrium, 0.01 to 0.20% titanium, 0.01 to 0.20% niobium, 0.01 to 0.10% zirconium, 0.001 to 0.015% magnesium, 0.001 to 0.010% calcium, max 0.030% nitrogen, max 0.50% silicon, max 0.25% manganese, max 0.020% phosphorus, max 0.010% sulfur, balance nickel and unavoidable melting conditioned impurities. The quantity of precipitable carbon C* is in the range 0.083% to 0.300%, where C*=C.sub.tot. -(C.sub.diss. +C.sub.fix.Ti +C.sub.fix.Nb +C.sub.fix.Zr).

Forgeable nickel alloy

The invention relates to a heat resistant hot formable austenitic nickel alloy consisting of (in % by weight)

Heat resistant hot formable austenitic nickel alloy

The invention relates to a heat resistant hot formable austenitic steel consisting of (in % by weight)

Heat resistant hot formable austenitic steel

A heat-deformable, austenitic nickel-chromium-iron alloy with high oxidation resistance and thermal strength, comprises

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Dinslaken, Germany

Ulrich Brill