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S21800 Stainless Steel vs. Grade 250 Maraging Steel

Both S21800 stainless steel and grade 250 maraging 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 S21800 stainless steel 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, % 40
7.3 to 17
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 75
75
Shear Strength, MPa 510
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 740
970 to 1800
Tensile Strength: Yield (Proof), MPa 390
660 to 1740

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 19
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
130 to 150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 26
23
Strength to Weight: Axial, points 27
33 to 61
Strength to Weight: Bending, points 24
26 to 40
Thermal Shock Resistance, points 17
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 to 0.1
0 to 0.030
Chromium (Cr), % 16 to 18
0
Cobalt (Co), % 0
7.0 to 8.5
Iron (Fe), % 59.1 to 65.4
66.3 to 71.1
Manganese (Mn), % 7.0 to 9.0
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 8.0 to 9.0
17 to 19
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.010
Silicon (Si), % 3.5 to 4.5
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Zirconium (Zr), % 0
0 to 0.020