> cold-induced fractures in metals can be influenced by various factors such as the material composition, the rate of temperature change, and the presence of residual stresses. > carbon steel pipelines: failures have been observed below -20c (-4f) with internal pressures around 1,000 psi (6.9 mpa) due to brittle fractures you're talking about high carbon steel under 1000 psi to create cold fractures. even in the link you provided at the source, it mentions the obvious that it depends on the the quality and composition of the steel. i didn't read the rest of your slop post.
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