Microstructural Analysis of the Brass Seat of a Valve from the 1907 Steam Tug ‘Hercules’
The steam tug Hercules was an ocean-going and bay tug for 55 years before being retired. It is now being restored by the National Park Service. A broken steam valve was obtained for microstructural examination. The body was gray cast iron, and the stem and seat were brass. The examination centered on corrosion of the brass components. The seat and shaft were alpha brass, with a hardness of 64 and 79 DPH, respectively. A nut held the shaft onto the seat, and was alpha-beta brass with a hardness of 197 DPH. Welded on the end of the shaft was...
Charlie R. Brooks, Dean Monday, Microstructural Analysis of the Brass Seat of a Valve from the 1907 Steam Tug ‘Hercules’, ASM Failure Analysis Case Histories: Mechanical and Machine Components, ASM International, 2019, https://doi.org/10.31399/asm.fach.mech.c9001684
Download citation file: