Exhaust-gas turbine

An exhaust-gas turbine for a turbocharger, comprising:

• a turbine casing having a spiral inlet duct;
• a rotor rotatably mounted in the turbine casing, an annular space of the turbine casing surrounding the rotor;
• an axial slide;
• a sliding sleeve;
• and
• a guide-blade cascade including guide blades, the guide-blade cascade being axially movable into the annular space near an outer circumference of the rotor, the guide-blade cascade being guided in an annular gap formed between an inner part and the turbine casing and being axially displaceable via the axial slide by the sliding sleeve;
• wherein the guide-blade cascade and at least one of the axial slide, the inner part and the sliding sleeve are formed from an austenitic cast steel material having the following components:
• C≦0.2%;
• Si 1.5-2.5%;
• Mn≦2.00%;
• P≦0.045%;
• S≦0.03%;
• Cr 24.0-26.0%;
• Ni 19-22%;
• and
• W≦5%.