Final Report on 3 Cr-1.5 Mo Steels for Gasifier Pressure Vessel Construction

摘要

This report provides results from an experimental program to evaluate the potential of 3 Cr-1.5 Mo steels for construction of large gasifier vessels for service at metal temperatures of 316 deg C and pressures to 8 MPa. Information starts with processing data for three commercial heats with different elements added for hardenability and strength. This is followed by a description of welding practices, which included submerged arc and shielded metal arc methods. Hardenability data are provided along with information on tempering and postweld heat treating. The mechanical properties compiled included tensile and impact strength, fracture toughness, fatigue, and embrittlement. The steels were found to be very promising and competitive with the best of the new steels being developed for petrochemical and petroleum applications. 48 refs., 47 figs., 6 tabs. (ERA citation 11:001967)