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ACI-ASTM CN3MN Steel vs. S32950 Stainless Steel

Both ACI-ASTM CN3MN steel and S32950 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN3MN steel and the bottom bar is S32950 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
260
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 39
17
Fatigue Strength, MPa 250
330
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 620
780
Tensile Strength: Yield (Proof), MPa 300
550

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 430
460
Maximum Temperature: Mechanical, °C 1100
1100
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
16
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 33
17
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
3.4
Embodied Energy, MJ/kg 84
47
Embodied Water, L/kg 200
180

Common Calculations

PREN (Pitting Resistance) 46
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
120
Resilience: Unit (Modulus of Resilience), kJ/m3 210
730
Stiffness to Weight: Axial, points 14
15
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
4.3
Thermal Shock Resistance, points 14
21

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 20 to 22
26 to 29
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 41.4 to 50.3
60.3 to 69.4
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 6.0 to 7.0
1.0 to 2.5
Nickel (Ni), % 23.5 to 25.5
3.5 to 5.2
Nitrogen (N), % 0.18 to 0.26
0.15 to 0.35
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.010