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SAE-AISI 1141 Steel vs. S40920 Stainless Steel

Both SAE-AISI 1141 steel and S40920 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1141 steel and the bottom bar is S40920 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 220
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
22
Fatigue Strength, MPa 270 to 430
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Shear Strength, MPa 460 to 480
270
Tensile Strength: Ultimate (UTS), MPa 740 to 810
430
Tensile Strength: Yield (Proof), MPa 400 to 700
190

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
710
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
26
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 12
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
6.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.0
Embodied Energy, MJ/kg 19
28
Embodied Water, L/kg 47
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 110
78
Resilience: Unit (Modulus of Resilience), kJ/m3 430 to 1290
97
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 29
15
Strength to Weight: Bending, points 23 to 25
16
Thermal Diffusivity, mm2/s 14
6.9
Thermal Shock Resistance, points 24 to 26
15

Alloy Composition

Carbon (C), % 0.37 to 0.45
0 to 0.030
Chromium (Cr), % 0
10.5 to 11.7
Iron (Fe), % 97.7 to 98.2
85.1 to 89.4
Manganese (Mn), % 1.4 to 1.7
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0.080 to 0.13
0 to 0.020
Titanium (Ti), % 0
0.15 to 0.5