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Maraging 300

(UNS K93120) Maraging 300 steel has excellent toughness and ductility. Maraging 300 has good fabrication characteristics and a low rate of work hardening. Maraging 300 has good machinability and weldability. Maraging 300 has an ultimate tensile strength of approximately 300,000 psi.


Element C Mn P S Si Ni Mo Co Al Ti
Maraging 300 0.03% max 0.10% max 0.01% max 0.01% max 0.10% max 18.5% 4.80% 9.00% 0.10% 0.60%

Physical Constants

Density0.289 lb/in3
Density8.0 g/cm 3


Solution Anneal1500ºF then air cool
Age Harden900ºF 3-6 hours then air cool

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" Sqaure 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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