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S20431 Stainless Steel vs. Grade 350 Maraging Steel

Both S20431 stainless steel and grade 350 maraging steel are iron alloys. They have 66% 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 S20431 stainless steel and the bottom bar is grade 350 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 46
4.1 to 18
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 76
75
Shear Strength, MPa 500
710 to 1400
Tensile Strength: Ultimate (UTS), MPa 710
1140 to 2420
Tensile Strength: Yield (Proof), MPa 350
830 to 2300

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1400
1470
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
39
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 2.5
5.6
Embodied Energy, MJ/kg 36
74
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 20
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
98 to 190
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 25
38 to 82
Strength to Weight: Bending, points 23
29 to 49
Thermal Shock Resistance, points 15
35 to 74

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 0.12
0 to 0.030
Chromium (Cr), % 17 to 18
0
Cobalt (Co), % 0
11.5 to 12.5
Copper (Cu), % 1.5 to 3.5
0
Iron (Fe), % 66.1 to 74.4
61.2 to 64.6
Manganese (Mn), % 5.0 to 7.0
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 2.0 to 4.0
18 to 19
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
1.3 to 1.6
Zirconium (Zr), % 0
0 to 0.020