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Grade 350 Maraging Steel vs. S82121 Stainless Steel

Both grade 350 maraging steel and S82121 stainless steel are iron alloys. They have 67% 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 grade 350 maraging steel and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 4.1 to 18
28
Poisson's Ratio 0.3
0.27
Rockwell C Hardness 34 to 60
26
Shear Modulus, GPa 75
78
Shear Strength, MPa 710 to 1400
470
Tensile Strength: Ultimate (UTS), MPa 1140 to 2420
730
Tensile Strength: Yield (Proof), MPa 830 to 2300
510

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 39
14
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 5.6
2.8
Embodied Energy, MJ/kg 74
40
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 16
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 190
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 38 to 82
26
Strength to Weight: Bending, points 29 to 49
23
Thermal Shock Resistance, points 35 to 74
20

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 0.035
Chromium (Cr), % 0
21 to 23
Cobalt (Co), % 11.5 to 12.5
0
Copper (Cu), % 0
0.2 to 1.2
Iron (Fe), % 61.2 to 64.6
66.7 to 75.4
Manganese (Mn), % 0 to 0.1
1.0 to 2.5
Molybdenum (Mo), % 4.6 to 5.2
0.3 to 1.3
Nickel (Ni), % 18 to 19
2.0 to 4.0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 1.3 to 1.6
0
Zirconium (Zr), % 0 to 0.020
0