Nickel-base N06235 alloy is a solid-solution strengthened Ni-Cr-Mo-Cu alloy that was developed to resist metal dusting corrosion attack in high temperature structural applications involving carbonaceous and other high temperature corrosive environments, particularly in syngas production and processing environments. Improved metal dusting resistance was achieved by significant additions of copper and high amounts chromium to inhibit carbon deposition, ingress, and coke formation as previously reported. The high temperature creep-rupture and tensile strength of the wrought alloy and its weldments were investigated in this paper. Weld samples produced by Gas Metal Arc Welding (GMAW) and Gas Tungsten Arc Welding (GTAW), exhibit tensile and creep-rupture strength similar to that of wrought alloy in the temperature range from 538 to 1093oC (1000 to 2000oF). In addition, the retained room and elevated temperature tensile properties of the wrought base metal after 4000-hour long-term aging at temperatures from 649 to 871°C (1200 to 1600oF) are reported.