The UNS S31254 Weld Neck Flange is also characterized by its high ductility as well as high impact strength. With high levels of chromium, molybdenum, and nitrogen content , the alloy is frequently used in high chloride containing environments. For example, the UNS S31254 Pipe Flange is used in environments such as seawater, brackish water, pulp mill bleach plants, and other chloride process streams.