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Molybdenum Steels for Pipelines

Stringent property requirements are specified for molybdenum steels to be used for oil and gas pipelines, especially for application in extremely cold climates.

The effect of controlled plate mill processing (including water spray cooling between hot rolling passes), and of simulated strip mill processing on the mechanical properties.

 And microstructure of pipe skelp of varying thickness has been studied in a family of Mn-Mo-Cb steels developed to meet these specifications.

By virtue of chemistry and process control, desired minimum levels of yield strength in the range of 60 to 90 ksi (415 to 620 N/mm2) have been achieved, with excellent corresponding toughness values, in strip and plate gauges up to 0.75 in (19 mm).


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