Abstract: Elaborated here in the paper are the R & D activities for the UNSN08031 alloy seamless pipe as used for the chemical heat exchanger.TheΦ50.8 mm×4 mm UNSN08031 alloy seamless pipe is successfully developed by means of employment of the hot-extrusion process to produce the blank pipe that is sequentially cold rolled/deformed via multiple passes.The analysis result proves that the said alloy pipe as developed features homogeneous grain distribution,Level 6 average grain size,excellent mechanical properties,and workability.Furthermore the alloy pipe also has its all technical indexes concerning chemical composition,metallographic structure and mechanical properties conforming to relevant requirements as specified under ASMESB 622—2019.