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Grade 250 Maraging Steel vs. AISI 314 Stainless Steel

Both grade 250 maraging steel and AISI 314 stainless steel 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 (12, in this case) are not shown.

For each property being compared, the top bar is grade 250 maraging steel and the bottom bar is AISI 314 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 7.3 to 17
45
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 75
78
Shear Strength, MPa 600 to 1060
410
Tensile Strength: Ultimate (UTS), MPa 970 to 1800
590
Tensile Strength: Yield (Proof), MPa 660 to 1740
230

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Melting Completion (Liquidus), °C 1480
1380
Melting Onset (Solidus), °C 1430
1340
Specific Heat Capacity, J/kg-K 450
490
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 32
25
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 4.9
4.3
Embodied Energy, MJ/kg 65
62
Embodied Water, L/kg 140
190

Common Calculations

PREN (Pitting Resistance) 16
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 150
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33 to 61
21
Strength to Weight: Bending, points 26 to 40
20
Thermal Shock Resistance, points 29 to 54
14

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0
Boron (B), % 0 to 0.0030
0
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0 to 0.25
Chromium (Cr), % 0
23 to 26
Cobalt (Co), % 7.0 to 8.5
0
Iron (Fe), % 66.3 to 71.1
46.7 to 56.5
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 4.6 to 5.2
0
Nickel (Ni), % 17 to 19
19 to 22
Phosphorus (P), % 0 to 0.010
0 to 0.045
Silicon (Si), % 0 to 0.1
1.5 to 3.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.3 to 0.5
0
Zirconium (Zr), % 0 to 0.020
0