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SAE-AISI M52 Steel vs. S81921 Stainless Steel

Both SAE-AISI M52 steel and S81921 stainless steel are iron alloys. They have 78% 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 M52 steel and the bottom bar is S81921 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
79
Tensile Strength: Ultimate (UTS), MPa 710 to 2280
710

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1510
1430
Melting Onset (Solidus), °C 1470
1390
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 31
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 7.5
2.9
Embodied Energy, MJ/kg 110
41
Embodied Water, L/kg 89
150

Common Calculations

PREN (Pitting Resistance) 20
28
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 80
25
Strength to Weight: Bending, points 22 to 49
23
Thermal Diffusivity, mm2/s 8.4
4.0
Thermal Shock Resistance, points 21 to 67
20

Alloy Composition

Carbon (C), % 0.85 to 1.0
0 to 0.030
Chromium (Cr), % 3.5 to 4.3
19 to 22
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 84.4 to 88.9
66.7 to 75.9
Manganese (Mn), % 0.15 to 0.45
2.0 to 4.0
Molybdenum (Mo), % 4.0 to 4.9
1.0 to 2.0
Nickel (Ni), % 0 to 0.3
2.0 to 4.0
Nitrogen (N), % 0
0.14 to 0.2
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
Tungsten (W), % 0.75 to 1.5
0
Vanadium (V), % 1.7 to 2.3
0