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ASTM A369 Grade FP12 vs. Grade 250 Maraging Steel

Both ASTM A369 grade FP12 and grade 250 maraging steel are iron alloys. They have 69% 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 ASTM A369 grade FP12 and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
7.3 to 17
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 73
75
Shear Strength, MPa 300
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 470
970 to 1800
Tensile Strength: Yield (Proof), MPa 250
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1470
1480
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
32
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 1.6
4.9
Embodied Energy, MJ/kg 21
65
Embodied Water, L/kg 52
140

Common Calculations

PREN (Pitting Resistance) 2.8
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
130 to 150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 17
33 to 61
Strength to Weight: Bending, points 17
26 to 40
Thermal Shock Resistance, points 14
29 to 54

Alloy Composition

Aluminum (Al), % 0
0.050 to 0.15
Boron (B), % 0
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 0.8 to 1.3
0
Cobalt (Co), % 0
7.0 to 8.5
Iron (Fe), % 96.8 to 98.4
66.3 to 71.1
Manganese (Mn), % 0.3 to 0.61
0 to 0.1
Molybdenum (Mo), % 0.44 to 0.65
4.6 to 5.2
Nickel (Ni), % 0
17 to 19
Phosphorus (P), % 0 to 0.025
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0 to 0.025
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Zirconium (Zr), % 0
0 to 0.020