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Forging Materials

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440C

(UNS S44000) A martensitic, high-carbon chromium stainless steel. Typically used as a bearing steel. Can attain hardness of 60HRc when heat treated.

Chemistry

Element C Mn P S Si Cr Mo
440C 0.95-1.20% 1.00% 0.04% 0.03% 1.00% 16.00-18.00% 0.75%

Physical Constants

Density0.275 lbs/in3
Density7.62 g/cm3

Heating

Forging1900-2100ºF Finish above 1700ºF
Annealing1550-1600ºF furnace cool
Tempering300-350ºF 1 hr minimum
Austenize1850-1900ºF oil or air quench

Viking Forging Parameters

Rings24" O.D. X 8" long500 lbs.
Sleeves24" O.D. max500 lbs.
Disks24" Dia. X 4" long500 lbs.
Round Bar9.5" Dia. X 96" long2000 lbs.
Square/Rectangular Bar9.5" Square max. X 96" long2000 lbs.
Blocks11.5" X 11.5" X 11.5"500 lbs.
Shafts9.5" Dia. max. X 96" long2000 lbs.

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