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INVAR36 FM

(UNS K93600) Invar 36FM (Free Machining) is a 36% nickel-iron alloy that has a rate of thermal expansion of approximately one-tenth of carbon steel up to about 400ºF. Used in applications where dimensional changes due to thermal expansion need to kept to a minimum

Chemistry

Element C Mn Si Ni Co Se
INVAR36 FM 0.05% 0.90% 0.35% 36.00% 0.20% 0.20%

Physical Constants

Density0.291 lbs/in3
Density8.01 g/cm3

Heating

Forging2150ºF-2200ºF
Annealing1450ºF then air cool

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" X14" X14"750 lbs.
Shafts12" Dia. max. X 96" long2600 lbs.

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