| 摘要 |
<p>Steel characterized by high yield strength, e.g., over 90,000 p.s.i., is rendered greatly less susceptible to Sulfide Corrosion Cracking in sour oil wells or comparable environments through the use of a sequence of heat treating operations in which the steel is heated within its Ac1 and Ac3 region and thereafter heated below its Ac1 temperature.</p> |
