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UNS Marage 250 Details

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Marage 250 Application:Steel, Maraging, Sheet, Strip, and Plate 18Ni - 7.8Co - 4.9Mo - 0.40Ti - 0.10AI Consumable Electrode Melted, Solution Heat Treated

Category Type Grade Microstructure Designations
Grades Stainless Steels Marage 250 Precipitation-Hardening USA - UNS , SAE AMS 6520D (1995) - Steel, Maraging, Sheet, Strip, and Plate 18Ni - 7.8Co - 4.9Mo - 0.40Ti - 0.10AI Consumable Electrode Melted, Solution Heat Treated

Chemical composition(wt.%) of Marage 250 grade: SAE AMS 6520D (1995)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.03
Si - 0.10
Mn - 0.10
Ni - 18.00
Cr - -
Al - 0.10
Cu - -
Ti - 0.40
Fe - -
Mo - 5.00
Co - 8.00
Steel, Maraging, Sheet, Strip, and Plate 18Ni - 7.8Co - 4.9Mo - 0.40Ti - 0.10AI Consumable Electrode Melted, Solution Heat Treated

Mechanical properties of grade Marage 250 SAE AMS 6520D (1995)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
851 (≥) 292 (≥) 22 31 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

Physical properties of grade Marage 250 SAE AMS 6520D (1995)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
939 (≥) 643 (≥) 13 42 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 232
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
885 966 856

Marage 250 - Form of Supply

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

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
A 646 Grade Marage 250 SAE USA
Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings
Marage 250 ASTM USA
Steel, Bars, Forgings, Tubing, and Rings 18Ni - 7.8Co - 4.9Mo - 0.40Ti - 0.10Al Consumable Electrode Vacuum Melted, Annealed
Marage 250 ASTM USA
Steel, Maraging, Sheet, Strip, and Plate 18Ni - 7.8Co - 4.9Mo - 0.40Ti - 0.10AI Consumable Electrode Melted, Solution Heat Treated
Marage 250 ASTM USA
Steel, Maraging, Welding Wire 18Ni - 8.0Co - 4.9Mo - 0.40Ti - 0.10Al Vacuum Induction Melted, Environment Controlled Packaging
Marage 250 UNS USA
Steel, Bars, Forgings, Tubing, and Rings 18Ni - 7.8Co - 4.9Mo - 0.40Ti - 0.10Al Consumable Electrode Vacuum Melted, Annealed
Marage 250 UNS USA
Steel, Maraging, Sheet, Strip, and Plate 18Ni - 7.8Co - 4.9Mo - 0.40Ti - 0.10AI Consumable Electrode Melted, Solution Heat Treated
Marage 250 UNS USA
Steel, Maraging, Welding Wire 18Ni - 8.0Co - 4.9Mo - 0.40Ti - 0.10Al Vacuum Induction Melted, Environment Controlled Packaging
Marage 300 ASTM USA
Steel, Maraging, Bars, Forgings, Tubing, and Rings 18.5Ni - 9.0Co - 4.9Mo - 0.65Ti - 0.10Al Consumable Electrode Vacuum Melted, Annealed
Marage 300 ASTM USA
Steel Sheet, Strip, and Plate, Maraging 18.5Ni - 9.0Co - 4.9Mo - 0.65Ti - 0.10AI Consumable Electrode Melted, Solution Heat Treated
Marage 300 UNS USA
Steel, Maraging, Bars, Forgings, Tubing, and Rings 18.5Ni - 9.0Co - 4.9Mo - 0.65Ti - 0.10Al Consumable Electrode Vacuum Melted, Annealed
Marage 300 UNS USA
Steel Sheet, Strip, and Plate, Maraging 18.5Ni - 9.0Co - 4.9Mo - 0.65Ti - 0.10AI Consumable Electrode Melted, Solution Heat Treated
Marage 300 UNS USA
Wire, Steel Welding, 18.5Ni - 8.5Co - 5.2Mo - 0.72Ti - 0.10Al, (Marage 300), Vacuum Melted, Environment Controlled Packaging

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