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Forging Materials

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(UNS SA41800) A chromium-nickel-tungsten martensitic stainless steel, also known as "Greek Ascoloy". Corrosion and heat resistant. Is hardenable by heat treating.


Element C Mn Si Cr Ni Mo
418 0.15-0.20% 0.50% max 0.50% max 12.00-14.00% 1.80-2.20% 0.50% max

Physical Constants

Density0.284 lbs/in3
Density7.86 g/cm3


Forging2000-2100ºF finish 1600-1700ºF
Annealing1215-1255ºF soak for 6 hours the air cool.
Austenize1750-1900ºF then oil quench

Viking Forging Parameters

Rings24" O.D. X 6" long500lbs.
Sleeves16" O.D. X 12" long500 lbs.
Disks26" Dia. X 6.5" long500 lbs.
Round Bar12" Dia. X 96" long2600 lbs.
Square/Rectangular Bar12" Sqaure max. X 96" long2600 lbs.
Blocks14" X 14" X 14"750 lbs.
Shafts12" Dia. max. X 96" long500 lbs.

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