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SAE-AISI 4161 Steel vs. AISI 202 Stainless Steel

Both SAE-AISI 4161 steel and AISI 202 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4161 steel and the bottom bar is AISI 202 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
14 to 45
Fatigue Strength, MPa 290
290 to 330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 420
490 to 590
Tensile Strength: Ultimate (UTS), MPa 680
700 to 980
Tensile Strength: Yield (Proof), MPa 410
310 to 580

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
910
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1410
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 43
15
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.8
Embodied Energy, MJ/kg 20
40
Embodied Water, L/kg 50
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 460
250 to 840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
25 to 35
Strength to Weight: Bending, points 22
23 to 29
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 22
15 to 21

Alloy Composition

Carbon (C), % 0.56 to 0.64
0 to 0.15
Chromium (Cr), % 0.7 to 0.9
17 to 19
Iron (Fe), % 96.7 to 97.6
63.5 to 71.5
Manganese (Mn), % 0.75 to 1.0
7.5 to 10
Molybdenum (Mo), % 0.25 to 0.35
0
Nickel (Ni), % 0
4.0 to 6.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.060
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030