Carbon Steel for Low Temp

If the standard says -28°C (-18.4°F), then 106-B should be acceptable regardless of what the supplier says.

As I recall, the ASME low-temp cutoff is at -20°F (~-28.9°C). However, US Coast Guard applications have (or had) a 0°F (~-17.8°C) cutoff. So it depends on what code has jurisdiction in the installation's location.

Is the applicable code the real issue here? if -27 degrees is the operating temp and the spec limit is -28 degrees, That one degree of "temperature margin" seems to me to be A) not very much margin and B) less than probable temperature measurement error.

Milo

Acrylonitrile styrene acrylate (ASA) is produced by introducing a grafted acrylic ester elastomer during the copolymerization reaction between styrene and acrylonitrile. Acrylonitrile styrene acrylate material has great toughness and rigidity,