ASTM 18Ni Maraging Steel

Grades | Superalloys | 18Ni Maraging Steel

ASTM 18Ni Maraging Steel ( Martensite )

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18Ni Maraging Steel Application: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
Elements Min.（≥） Max.（≤） Similar Remarks
C - 0.03
Si - 0.10
Mn - 0.10
P - 0.010
S - 0.010
Cr - 0.50
Ni 18.00 19.00
Mo 4.60 5.20
Cu - 0.50
Co 8.50 9.50
Al 0.05 0.15
Ti 0.50 0.80
Fe - Bal

Mechanical properties of grade 18Ni Maraging Steel

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition HBW
112 (≥) 671 (≥) 14 12 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical properties of grade 18Ni Maraging Steel

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm
544 (≥) 789 (≥) 22 13 34 Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2		 - - -
342 854 373 - - -

18Ni Maraging Steel Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED