“WIKIPEDIA
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Maraging steel is an iron-based steel alloy which is known for possessing superior strength without losing malleability. The iron base is alloyed principally with various proportions of cobalt and nickel as strengthening agents. Other alloying elements include molybdenum, aluminum, and titanium. Maraging steel is essentially free of carbon, which distinguishes it from most other types of steel. The result is a steel which
Possesses high strength and toughness
Allows for easy machining with minimal distortion
Has uniform, predictable shrinkage during heat treatment
Can be easily nitrided
Resists corrosion and crack propagation
Can be finely polished
A special class of low carbon ultra-high strength steels which derive their strength not from carbon but from precipitation of inter-metallic compounds. Original development was carried out on 20 and 25% Ni steels to which small additions of Al, Ti and Nb were made. The common grades contain 17-19% nickel, 8-12% cobalt, 3-5% molybdenum and 0.2-1.6% titanium.”
(http://en.wikipedia.org/wiki/Maraging_steel)


“PROTOCOL ADDITIONAL TO THE AGREEMENT BETWEEN THE REPUBLIC OF CROATIA AND THE INTERNATIONAL ATOMIC ENERGY AGENCY FOR THE APPLICATION OF SAFEGUARDS IN CONNECTION WITH THE TREATY ON THE NON-PROLIFERATION OF NUCLEAR WEAPONS
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(a) Maraging steel capable of an ultimate tensile strength of 2.05 x 109 N/m˛ (300,000 psi) or more;
...
(a) le¬girani čelik maksimalne vlačne čvrstoće 2,05 • 109 N/m˛ (300.000 psi) ili više”
(http://www.nn.hr/clanci/medjunarodni/2000/072.htm)


A “maraging” se može ostaviti i neprevedeno:
“UNIVERZITET U KRAGUJEVCU
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B. Anđelić: Ispitivanje procesa starenja i  transformacije u maraging čeliku Fe-Ni-Co-Mo-Ti tipa, Tehnološko-metalurški fakultet, Beograd, 1984., 119 str.
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B. Anđelić, N. Novović Simović, N. Vidojević: Dilatometrijsko praćenje procesa starenja i  transformacije u maraging čeliku odabranog sastava, Savetovanje o savremenim postupcima termičke obrade i ocene metalnih materijala, Kragujevac, 1980., Zbornik radova, 1-15.
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N. Vidojević, N. Novović Simović, B. Anđelić:  transformacija u maraging čeliku Fe-Ni-Co-Mo-Ti tipa, III Jugoslovenski simpozijum o metalurgiji, Beograd, 1984., Zbornik radova, knjiga 2, 676-680.”
(http://www.uis.kg.ac.yu/Stari/srpski/Referati/Arhiva/tehnick...

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Note added at 5 hrs (2006-01-22 01:38:34 GMT)
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Inače, osnovna podela čelika je na ugljenične čelike i legirane čelike... Više o time, na pr na:
http://www.sf.bg.ac.yu/vps/vps/priprema za predavanje iz VPS...
http://www.maskv.edu.yu/web/srpski/Katedre/maskon/masmat/mas...
itd.