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Grade 250 Maraging Steel vs. S21800 Stainless Steel

Both grade 250 maraging steel and S21800 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is grade 250 maraging steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 7.3 to 17
40
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 75
75
Shear Strength, MPa 600 to 1060
510
Tensile Strength: Ultimate (UTS), MPa 970 to 1800
740
Tensile Strength: Yield (Proof), MPa 660 to 1740
390

Thermal Properties

Latent Heat of Fusion, J/g 270
340
Melting Completion (Liquidus), °C 1480
1360
Melting Onset (Solidus), °C 1430
1310
Specific Heat Capacity, J/kg-K 450
500
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 32
15
Density, g/cm3 8.2
7.5
Embodied Carbon, kg CO2/kg material 4.9
3.1
Embodied Energy, MJ/kg 65
45
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 16
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 150
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
26
Strength to Weight: Axial, points 33 to 61
27
Strength to Weight: Bending, points 26 to 40
24
Thermal Shock Resistance, points 29 to 54
17

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 0.1
Chromium (Cr), % 0
16 to 18
Cobalt (Co), % 7.0 to 8.5
0
Iron (Fe), % 66.3 to 71.1
59.1 to 65.4
Manganese (Mn), % 0 to 0.1
7.0 to 9.0
Molybdenum (Mo), % 4.6 to 5.2
0
Nickel (Ni), % 17 to 19
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.010
0 to 0.060
Silicon (Si), % 0 to 0.1
3.5 to 4.5
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