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Special Steel, Maraging 350

This grade is a low carbon Maraging steel, cobalt strengthened to give excellent toughness and ductility. The alloy has good fabrication characteristics, which include a low rate of work hardening, good Machinability and weldability, and a very simple heat treatment process. The applications are missile and rocket motor cases, landing and take off gear, tooling, high performance shafts, gears, fasteners and munitions.

 
Chemical Composition (Weight %)
  Ni Co  Mo Ti Al C Mn Si P  S
Min 18.00 11.50  4.60 1.30 0.05
 
   
Max 19.00 12.50 5.20 1.60 0.15 0.03 0.10 0.10 0.01 0.01

Typical Mechanical Properties (Min after aging)
Form Fracture toughness KSI/in Yield Strength 0.2%, KSI  Elongation % Reduction of Area % Toughness, Charpy
Bar 25 330 2.8  25 6
 Sheet, Strip
330 1.0


 

Related Specifications

Mil-S-46850D

Available Forms 

Bar, plate, sheet, strip, wire, forgings, fasteners, machined components 
 
Chemical Composition (Weight %)
  Min Max
Ni 18.00 19.00
Co 11.50 12.50
Mo 4.60 5.20
Ti 1.30 1.60
Al 0.05 0.15
C   0.03
Mn   0.10
Si   0.10
P   0.01
S   0.01

Typical Mechanical Properties (Min after aging)
Bar
Fracture toughness KSI/in 25
Yield Strength 0.2%, KSI 330
 Elongation % 2.8
Reduction of Area % 25
Toughness, Charpy ft/lbs 6
Sheet, Strip
Fracture toughness KSI/in  
Yield Strength 0.2%, KSI 330
 Elongation % 1.0
Reduction of Area %  
Toughness, Charpy ft/lbs  
 

Related Specifications

Mil-S-46850D

Available Forms 

Bar, plate, sheet, strip, wire, forgings, fasteners, machined components