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13-8 MO

(UNS S13800) Martensitic precipitation hardening stainless steel with high hardness and good corrosion resistance. 13-8 MO is age hardened (precipitation hardened) between 950 and 1150ºF with 950ºF age yielding the highest strength.

Chemistry

Element C Mn P S Cr Ni Mo N Al
13-8 MO 0.05 max 0.10 max 0.010 max 0.008max 12.25-13.25 7.50-8.50 2.00-2.50 0.01 max 0.90-1.35

Physical Constants

Density0.280 lb/in3
Density7.76 g/cm3

Heating

Forging2150-1750ºF
Solution Treat1700ºF
Age Harden950ºF,1000ºF, 1050ºF, 1100ºF, 1150ºF

Viking Forging Parameters

Rings24" O.D. X 8" long500 lbs.
Sleeves24" O.D. max.500 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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