BELMONT ALLOY 2405 is a tin-base alloy that can be melted easily. Being non-eutectic it melts through a temperature range, namely 281 to 338 F. It is used widely for proof casting in foundries, for sealing and soldering in low-temperature work, and for lost-wax pattern dies. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on heat treating and machining. Filing Code: Sn-7. Producer or source: Belmont Metals Inc..