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SAE-AISI 4161 Steel vs. EN 1.4618 Stainless Steel

Both SAE-AISI 4161 steel and EN 1.4618 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 (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 EN 1.4618 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
51
Fatigue Strength, MPa 290
240 to 250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 420
480 to 500
Tensile Strength: Ultimate (UTS), MPa 680
680 to 700
Tensile Strength: Yield (Proof), MPa 410
250 to 260

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
900
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
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.7

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
2.7
Embodied Energy, MJ/kg 20
39
Embodied Water, L/kg 50
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
270 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 460
160 to 170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
24 to 25
Strength to Weight: Bending, points 22
22 to 23
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 22
15 to 16

Alloy Composition

Carbon (C), % 0.56 to 0.64
0 to 0.1
Chromium (Cr), % 0.7 to 0.9
16.5 to 18.5
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 96.7 to 97.6
62.7 to 72.5
Manganese (Mn), % 0.75 to 1.0
5.5 to 9.5
Molybdenum (Mo), % 0.25 to 0.35
0
Nickel (Ni), % 0
4.5 to 5.5
Nitrogen (N), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.035
0 to 0.070
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.010