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SAE-AISI 4161 Steel vs. N08801 Stainless Steel

Both SAE-AISI 4161 steel and N08801 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 47% of their average alloy composition in common. There are 30 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 N08801 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
34
Fatigue Strength, MPa 290
260
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 420
570
Tensile Strength: Ultimate (UTS), MPa 680
860
Tensile Strength: Yield (Proof), MPa 410
190

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1090
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1410
1360
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
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
30
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.5
5.5
Embodied Energy, MJ/kg 20
79
Embodied Water, L/kg 50
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 460
92
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
30
Strength to Weight: Bending, points 22
25
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 22
20

Alloy Composition

Carbon (C), % 0.56 to 0.64
0 to 0.1
Chromium (Cr), % 0.7 to 0.9
19 to 22
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 96.7 to 97.6
39.5 to 50.3
Manganese (Mn), % 0.75 to 1.0
0 to 1.5
Molybdenum (Mo), % 0.25 to 0.35
0
Nickel (Ni), % 0
30 to 34
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015
Titanium (Ti), % 0
0.75 to 1.5