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AISI 431 Stainless Steel vs. Grade 350 Maraging Steel

Both AISI 431 stainless steel and grade 350 maraging steel are iron alloys. They have 65% 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 AISI 431 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, % 15 to 17
4.1 to 18
Poisson's Ratio 0.28
0.3
Rockwell C Hardness 26
34 to 60
Shear Modulus, GPa 77
75
Shear Strength, MPa 550 to 840
710 to 1400
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
1140 to 2420
Tensile Strength: Yield (Proof), MPa 710 to 1040
830 to 2300

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
39
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 2.2
5.6
Embodied Energy, MJ/kg 31
74
Embodied Water, L/kg 120
160

Common Calculations

PREN (Pitting Resistance) 16
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
98 to 190
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 32 to 50
38 to 82
Strength to Weight: Bending, points 27 to 36
29 to 49
Thermal Shock Resistance, points 28 to 43
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 0.2
0 to 0.030
Chromium (Cr), % 15 to 17
0
Cobalt (Co), % 0
11.5 to 12.5
Iron (Fe), % 78.2 to 83.8
61.2 to 64.6
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 0
4.6 to 5.2
Nickel (Ni), % 1.3 to 2.5
18 to 19
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
1.3 to 1.6
Zirconium (Zr), % 0
0 to 0.020