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ACI-ASTM CF3MN Steel vs. S31266 Stainless Steel

Both ACI-ASTM CF3MN steel and S31266 stainless steel are iron alloys. They have 74% 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 CF3MN steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 39
40
Fatigue Strength, MPa 250
400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
81
Tensile Strength: Ultimate (UTS), MPa 580
860
Tensile Strength: Yield (Proof), MPa 290
470

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 1010
1100
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 19
37
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 3.9
6.5
Embodied Energy, MJ/kg 53
89
Embodied Water, L/kg 160
220

Common Calculations

PREN (Pitting Resistance) 30
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
290
Resilience: Unit (Modulus of Resilience), kJ/m3 210
540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 20
29
Strength to Weight: Bending, points 20
24
Thermal Diffusivity, mm2/s 4.1
3.1
Thermal Shock Resistance, points 13
18

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17 to 22
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 58.7 to 71.9
34.1 to 46
Manganese (Mn), % 0 to 1.5
2.0 to 4.0
Molybdenum (Mo), % 2.0 to 3.0
5.2 to 6.2
Nickel (Ni), % 9.0 to 13
21 to 24
Nitrogen (N), % 0.1 to 0.2
0.35 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5