MARAGING (C) 300 | AMS 6514 | ASTM A 538 | UNS K93120 | ASTM A579 | SAE AMS 6514 | MIL S 46850
Maraging is a 18% nickel, cobalt strengthened steel (C-type), with excellent mechanical properties, workability and heat treatment characteristics.
Alloy steels comprise a wide variety of steels with compositions that exceed the limitations of Si, Va, Cr, Ni, Mo, Mn, B and C allocated for carbon steels. In comparison with carbon steels, alloy steels are more responsive to mechanical and heat treatments.
Alloy steels can be used in specific melting and deoxidization processes for particular applications. These steels have elements such as chromium, cobalt, nickel, etc.
Maraging 300 alloy steel is a very high strength iron base, molybdenum, cobalt and nickel alloy. The following datasheet provides an overview of maraging 300 alloy steel.
Typical applications for maraging include missile and rocket motor cases, landing and takeoff gear, munitions, aerospace, extrusion tooling, die casting, high performance shafting, gears and fasteners.
- C : 0.03 max
- Mn : 0.10 max
- Si : 0.10 max
- P : 0.10 max
- S : 0.10 max
- NI : 18.00-19.00
- Co : 8.50-9.50
- Mo : 4.60-5.20
- Ti : 0.50 -0.80
- Al : 0.05-0.15
- Cr : 0.50 max
- Cu : 0.50 max
Material Melt Method Maraging melt method is a VIM (Vacuum Induction Melt) + VAR (Vacuum Arc Remelt)
As Shipped Condition Maraging is supplied in the annealed and descaled condition. The alloy is very tough, relatively soft (36 Rc Max.), therefore, readily machined and formed.
The following table shows the physical properties of maraging 300 alloy steel.
|Density||8.00 g/cm3||0.289 lb/in³|
|Melting point||1412.8 °C||2575°F|
Minimum Properties after Aging
- Hardness ……………… 52 Rc
- Charpy V-notch ……… 12 ft/lbs. min
- Reduction of Area ……. 47%
- Elongation ……………. 5.0%
- Yield Strength …………. 280 ksi
- Fracture Toughness ….. 60
Heat Treatment Aging Process (Non Die Casting Applications) Material is to be heat treated to 900 F +/- 10 holding at temperature for 6 hours then cooling at room air temperature. During the aging treatment maraging shrinks uniformly and predictably on all dimensions .001 in/in
Heat Treatment Aging Process (Die Casting Applications) Following the rough machining of the die, anneal at 1500-1525 F for 1 hour per inch of thickness is recommended. After finish machining , an aging heat treatment of 980-1000 F for 6 hours is recommended.
Maraging steel in the annealed condition is comparable to 4340. However, when maraging is aged, the type of cutting tool and speeds change. Rigid equipment, firm tool supports, sharp tools and abundant coolant are essential.
Maraging is weld able without preheat, in both the annealed and aged condition. Only an aging heat treatment is needed to restore in the weld.
- AMS 6514
- ASTM A 538
- UNS K93120
- ASTM A579
- SAE AMS 6514 and AMS 6521 (UNS K93160) – Sheet, Strip, Plate
- MIL S 46850, MIL S 13881
- Werkstoff Nr. 1.6358 and 1.6354
- Vascomax C300
- Vdimor 300
FountainHead Alloys is ISO 9001:2015 approved. © FountainHead Alloys 1996