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SAE-AISI 4161 Steel vs. N08320 Stainless Steel

Both SAE-AISI 4161 steel and N08320 stainless steel are iron alloys. They have 47% 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 4161 steel and the bottom bar is N08320 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
40
Fatigue Strength, MPa 290
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 420
400
Tensile Strength: Ultimate (UTS), MPa 680
580
Tensile Strength: Yield (Proof), MPa 410
220

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1410
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 43
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
28
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
4.9
Embodied Energy, MJ/kg 20
69
Embodied Water, L/kg 50
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
180
Resilience: Unit (Modulus of Resilience), kJ/m3 460
120
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
20
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 22
13

Alloy Composition

Carbon (C), % 0.56 to 0.64
0 to 0.050
Chromium (Cr), % 0.7 to 0.9
21 to 23
Iron (Fe), % 96.7 to 97.6
40.4 to 50
Manganese (Mn), % 0.75 to 1.0
0 to 2.5
Molybdenum (Mo), % 0.25 to 0.35
0
Nickel (Ni), % 0
25 to 27
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030