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SAE-AISI 1141 Steel vs. S31266 Stainless Steel

Both SAE-AISI 1141 steel and S31266 stainless steel are iron alloys. They have 42% 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 SAE-AISI 1141 steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 11 to 17
40
Fatigue Strength, MPa 270 to 430
400
Poisson's Ratio 0.29
0.28
Reduction in Area, % 34 to 39
56
Shear Modulus, GPa 72
81
Shear Strength, MPa 460 to 480
590
Tensile Strength: Ultimate (UTS), MPa 740 to 810
860
Tensile Strength: Yield (Proof), MPa 400 to 700
470

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 51
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 12
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
37
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 1.4
6.5
Embodied Energy, MJ/kg 19
89
Embodied Water, L/kg 47
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 110
290
Resilience: Unit (Modulus of Resilience), kJ/m3 430 to 1290
540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 29
29
Strength to Weight: Bending, points 23 to 25
24
Thermal Diffusivity, mm2/s 14
3.1
Thermal Shock Resistance, points 24 to 26
18

Alloy Composition

Carbon (C), % 0.37 to 0.45
0 to 0.030
Chromium (Cr), % 0
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 97.7 to 98.2
34.1 to 46
Manganese (Mn), % 1.4 to 1.7
2.0 to 4.0
Molybdenum (Mo), % 0
5.2 to 6.2
Nickel (Ni), % 0
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0.080 to 0.13
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5