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Forging Materials

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4320AQ

(UNS G43200) 4320AQ (Aircraft Quality) Alloy steel with high toughness and strength with a low carbon content which yields good welding characteristics. Is machined well in the annealed condition.

Chemistry

Element C Mn P S Si Cr Ni Mo
4320AQ 0.170-0.220% 0.450-0.650% 0.035% max 0.040% max 0.150-0.300% 0.400-0.600% 1.65-2.00% 0.200-0.300%

Physical Constants

Density0.284 lbs/in3
Density7.85 g/cm3

Heating

Forging1900-2200ºF
Annealing1600ºF furnace cool
Tempering400-1300ºF
Normalizing1650ºF air cool
Austenize1500ºF then oil 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 X 96" long2600 lbs.
Blocks14" X 14" X 14"750 lbs.
Shafts12" Dia max X 96" long2600 lbs.

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