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SAE-AISI M50 Steel vs. S43037 Stainless Steel

Both SAE-AISI M50 steel and S43037 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 24 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 SAE-AISI M50 steel and the bottom bar is S43037 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 720 to 2250
410

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1480
1440
Melting Onset (Solidus), °C 1440
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 35
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 10
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
9.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 5.1
2.3
Embodied Energy, MJ/kg 74
32
Embodied Water, L/kg 83
120

Common Calculations

PREN (Pitting Resistance) 19
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 80
15
Strength to Weight: Bending, points 23 to 49
16
Thermal Diffusivity, mm2/s 9.7
6.7
Thermal Shock Resistance, points 21 to 66
14

Alloy Composition

Carbon (C), % 0.78 to 0.88
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
16 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87 to 90.4
77.9 to 83.9
Manganese (Mn), % 0.15 to 0.45
0 to 1.0
Molybdenum (Mo), % 3.9 to 4.8
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.1 to 1.0
Vanadium (V), % 0.8 to 1.3
0