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This Part of BS 1501 specifies requirements for
corrosion-and heat-resisting steel, in the form of
plates 3 mm to 100 mm thick, wide strip and
sheet 0.30 mm to less than 3 mm thick and narrow
strip 0.050 mm to less than 3 mm thick, for
pressure purposes, for use at ambient, elevated and
low service temperatures.
Provision has been made for certain steels to meet
properties at different combinations of temperature,
and where appropriate, requirements are specified
for ambient temperature properties only, and
ambient temperature and elevated temperature
properties.
With the exception of the duplex grade 318S13, the
steels included in this Part of BS 1501 are not notch
sensitive at ambient temperature nor at
temperatures down to – 196 °C. Impact values are
not specified, but see options B.8 and B.9.