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SAE-AISI M46 Steel vs. S31254 Stainless Steel

Both SAE-AISI M46 steel and S31254 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M46 steel and the bottom bar is S31254 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 800 to 2300
720

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1540
1460
Melting Onset (Solidus), °C 1500
1420
Specific Heat Capacity, J/kg-K 450
460
Thermal Conductivity, W/m-K 18
14
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 33
28
Density, g/cm3 8.1
8.0
Embodied Carbon, kg CO2/kg material 12
5.5
Embodied Energy, MJ/kg 180
74
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 35
44
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27 to 78
25
Strength to Weight: Bending, points 24 to 48
22
Thermal Diffusivity, mm2/s 4.9
3.8
Thermal Shock Resistance, points 25 to 71
15

Alloy Composition

Carbon (C), % 1.2 to 1.3
0 to 0.020
Chromium (Cr), % 3.7 to 4.2
19.5 to 20.5
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0.5 to 1.0
Iron (Fe), % 70 to 73.8
51.4 to 56.3
Manganese (Mn), % 0.2 to 0.4
0 to 1.0
Molybdenum (Mo), % 8.0 to 8.5
6.0 to 6.5
Nickel (Ni), % 0 to 0.3
17.5 to 18.5
Nitrogen (N), % 0
0.18 to 0.22
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.4 to 0.65
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 1.9 to 2.2
0
Vanadium (V), % 3.0 to 3.3
0