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S82121 Stainless Steel vs. Grade 250 Maraging Steel

Both S82121 stainless steel and grade 250 maraging steel are iron alloys. They have 73% of their average alloy composition in common. There are 25 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 S82121 stainless steel and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
7.3 to 17
Poisson's Ratio 0.27
0.3
Rockwell C Hardness 26
30 to 53
Shear Modulus, GPa 78
75
Shear Strength, MPa 470
600 to 1060
Tensile Strength: Ultimate (UTS), MPa 730
970 to 1800
Tensile Strength: Yield (Proof), MPa 510
660 to 1740

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1430
1480
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 14
32
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 2.8
4.9
Embodied Energy, MJ/kg 40
65
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 28
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
130 to 150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 26
33 to 61
Strength to Weight: Bending, points 23
26 to 40
Thermal Shock Resistance, points 20
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 0.035
0 to 0.030
Chromium (Cr), % 21 to 23
0
Cobalt (Co), % 0
7.0 to 8.5
Copper (Cu), % 0.2 to 1.2
0
Iron (Fe), % 66.7 to 75.4
66.3 to 71.1
Manganese (Mn), % 1.0 to 2.5
0 to 0.1
Molybdenum (Mo), % 0.3 to 1.3
4.6 to 5.2
Nickel (Ni), % 2.0 to 4.0
17 to 19
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Zirconium (Zr), % 0
0 to 0.020