Product DescriptionAlloy 347 is a stabilized, austenitic, chromium steel containing columbium which allows for the elimination of carbide precipitation. Alloy 347 is stabilized by the additions of chromium and tantalum and offers higher creep and stress rupture properties than alloy 304 and 304L which may also be used for exposures where sensitization and corrosion are of concern. The addition of columbium also allows Alloy 347 to have excellent corrosion resistance, even superior to that of alloy 321. 347H is the higher carbon composition form of Alloy 347 and demonstrates improved high temperature and creep properties
Note: Pipe sizes can be confusing as the listed size has little or no resemblance to the actual size of the pipe and in most cases listed pipe size is closer to the "inside diameter" of the pipe. While tubes are identified by the actual Outside Diameter (OD) and Wall Thickness (W), pipe sizes are nominal and wall thickness is identified by what is known as a Schedule. Please refer to actual sizes of OD and Wall.