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ACI-ASTM CN3MN Steel vs. S82031 Stainless Steel

Both ACI-ASTM CN3MN steel and S82031 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN3MN steel and the bottom bar is S82031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 39
39
Fatigue Strength, MPa 250
490
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 620
780
Tensile Strength: Yield (Proof), MPa 300
570

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 430
430
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 33
13
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
2.8
Embodied Energy, MJ/kg 84
39
Embodied Water, L/kg 200
150

Common Calculations

PREN (Pitting Resistance) 46
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
280
Resilience: Unit (Modulus of Resilience), kJ/m3 210
820
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21
28
Strength to Weight: Bending, points 20
24
Thermal Diffusivity, mm2/s 3.4
3.9
Thermal Shock Resistance, points 14
22

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.050
Chromium (Cr), % 20 to 22
19 to 22
Copper (Cu), % 0 to 0.75
0 to 1.0
Iron (Fe), % 41.4 to 50.3
68 to 78.3
Manganese (Mn), % 0 to 2.0
0 to 2.5
Molybdenum (Mo), % 6.0 to 7.0
0.6 to 1.4
Nickel (Ni), % 23.5 to 25.5
2.0 to 4.0
Nitrogen (N), % 0.18 to 0.26
0.14 to 0.24
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.010
0 to 0.0050