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18Ni Maraging Steel

Description

USA ASTM AMS 6514, ASTM A 538, Mil-S-46850D, UNS K93120, 18Ni Maraging Steel Superalloys 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. and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Superalloys: 18Ni Maraging Steel
Category Class Grade Type Standard Country Application
Steel GradesSuperalloys 18Ni Maraging Steel Martensite ASTM USA 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.

Chemical composition(mass fraction)(wt.%) of the 18Ni Maraging Steel

C Si Mn P S Cr Ni Mo Cu Co Al Ti Fe
≤0.03 ≤0.10 ≤0.10 ≤0.010 ≤0.010 ≤0.50 18.00 -19.00 4.60 -5.20 ≤0.50 8.50 -9.50 0.05 -0.15 0.50 -0.80 ≤Bal

Mechanical Properties of steel grade 18Ni Maraging Steel

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
851 (≥) 993 (≥) 34 21 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade 18Ni Maraging Steel

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
12 - -     0.44 -  
868 857 - 33.3 411   -  
655 - 13 31.2   424 141

Heat Treatment of steel grade 18Ni Maraging Steel

Heat treated : 1511°C - 1787°C

Technological Curves of steel grade 18Ni Maraging Steel

Cross Reference Table (Equivalent Grade) of 18Ni Maraging Steel

Relevant standard of 18Ni Maraging Steel


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