Abstract: The present disclosure is directed to new ferritic alloys comprising iron, chromium, and silicon. The novel alloys have surprisingly enhanced corrosion resistant properties, with excellent workability, strength, and ductility. The disclosed alloys, and products made therefrom are useful in making low cost, efficient, and clean biomass stove combustors, as well as other devices for use with biomass fuel.

Abstract: Heaters for treating a subsurface formation are described herein. Such heaters can be obtained by using the systems and methods described herein. The heater includes a heater section including iron, cobalt, and carbon. The heater section has a Curie temperature less than a phase transformation temperature. The Curie temperature is at least 740° C. The heater section provides, when time varying current is applied to the heater section, an electrical resistance.

Abstract: Systems, methods, and heaters for treating a subsurface formation are described herein. Systems and methods for making heaters are described herein. At least one heater includes a ferromagnetic conductor and an electrical conductor. The electrical conductor is electrically coupled to the ferromagnetic conductor. The heater provides a first amount of heat at a lower temperature. The heater may provide a second reduced amount of heat when the heater reaches a selected temperature, or enters a selected temperature range, at which the ferromagnetic conductor undergoes a phase transformation.