Techalloy 2594 description: Techalloy 2594 provides matching chemistry and mechanical property characteristics to wrought super duplex alloys such as 2507 and Zeron 100, as well as to super duplex casting alloys (ASTM A890). The welding wire is over alloyed 2-3% in Nickel to provide the optimum ferrite/austenite ratio in the finished weld. This structure results in high tensile/yield strength and superior resistance to SCC and pitting corrosion.