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347

(UNS S34700) A columbium/tantalum stabilized austenitic stainless steel. Has very good intergranular-corrosion resistance. Used in application of intermittent heating between 800ºF and 1650ºF.

Chemistry

Element C Mn P S Si Cr Ni
347 0.08% max 2.00% max 0.045% max 0.030% max 1.00% max 17.00-19.00% 9.00-13.00%

Physical Constants

Density0.285 lbs/in3
Density7.89 g/cm3

Heating

Forging2100-2250ºF finish above 1700ºF
Annealing1850-2000ºF then water quench

Viking Forging Parameters

Rings24" O.D. X 6" long500 lbs.
Sleeves16" O.D. X 12" long500 lbs.
Disks26" Dia. X 6.5" long500 lbs.
Round Bar12" Dia. X 96" long2600 lbs.
Square/Rectangular Bar12" Square max. X 96" long2600 lbs.
Blocks14" X 14" X 14"750 lbs.
Shafts12" Dia. max. X 96" long2600 lbs.

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