Cu Ni alloy ASME SB466 #150 sch 40 flange
This flange contains a small amount of niobium to improve the weldability of the flange, has a minimum yield strength of 15 ksi and is moderately tough.
Copper Nickel UNS C71500 Threaded Flanges are not embrittled in hydrogen atmosphere and have good hot and cold workability and weldability. Meanwhile, Copper Nickel 70-30 (C71500, CW354H) contains 30% nickel. It resists higher flow rates and is stronger than 90-10 cupro. The addition of nickel alloys to copper increases the strength and corrosion resistance of copper-nickel so that cupronickel remains ductile, and other elements that can be added to copper-nickel improve hardenability, corrosion resistance, weldability, strength and Castability.