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Grade 250 Maraging Steel vs. ASTM A369 Grade FP91

Both grade 250 maraging steel and ASTM A369 grade FP91 are iron alloys. They have 70% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is grade 250 maraging steel and the bottom bar is ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 7.3 to 17
19
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 75
75
Shear Strength, MPa 600 to 1060
410
Tensile Strength: Ultimate (UTS), MPa 970 to 1800
670
Tensile Strength: Yield (Proof), MPa 660 to 1740
460

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 32
7.0
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 4.9
2.6
Embodied Energy, MJ/kg 65
37
Embodied Water, L/kg 140
88

Common Calculations

PREN (Pitting Resistance) 16
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 150
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33 to 61
24
Strength to Weight: Bending, points 26 to 40
22
Thermal Shock Resistance, points 29 to 54
18

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0 to 0.020
Boron (B), % 0 to 0.0030
0
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0.080 to 0.12
Chromium (Cr), % 0
8.0 to 9.5
Cobalt (Co), % 7.0 to 8.5
0
Iron (Fe), % 66.3 to 71.1
87.3 to 90.3
Manganese (Mn), % 0 to 0.1
0.3 to 0.6
Molybdenum (Mo), % 4.6 to 5.2
0.85 to 1.1
Nickel (Ni), % 17 to 19
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.010
0 to 0.025
Silicon (Si), % 0 to 0.1
0.2 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.025
Titanium (Ti), % 0.3 to 0.5
0 to 0.010
Vanadium (V), % 0
0.18 to 0.25
Zirconium (Zr), % 0 to 0.020
0 to 0.010