CORROSION AND HEAT RESISTANT NI-CR-MO-CO ALLOY TUBE FOR USE IN SOUR GAS WELLS

摘要

Tubular metal products and methods of making tubular metal products for use in sour gas wells, which are characterized by resistance to hydrogen sulfide embrittlement at temperatures up to about 600 DEG F., are provided based upon an alloy having the composition up to about 0.035% maximum carbon, up to about 0.15% maximum silicon, up to about 0.15% maximum manganese, up to about 0.010% maximum sulfur, up to about 0.015% maximum phosphorus, about 19.0% to about 21.0% chromium, about 33.0% up to about 37.0% nickel, about 9.0% to about 10.5% molybdenum, up to about 1.0% titanium, up to about 0.015% boron, up to about 2% iron and the balance cobalt, said tubular product having been heat treated in the range 1350 DEG F. to 1500 DEG F. after cold working up to about 75%.