Märker G-4857M is a 25Cr-37Ni-Mo alloy with good creep rupture strength and good resistance to carburization. and oxidation. The alloy is used as tubes and castings for reformer and pyrolysis furnaces. It can be used to 1100 deg C (2000 deg F) in air or combustion gases. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on casting and joining. Filing Code: SS-635. Producer or source: Schmidt & Clemens Inc.