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SAE-AISI 8740 Steel vs. EN 1.4162 Stainless Steel

Both SAE-AISI 8740 steel and EN 1.4162 stainless steel are iron alloys. They have 73% 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 8740 steel and the bottom bar is EN 1.4162 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 23
32
Fatigue Strength, MPa 270 to 350
410
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 370 to 400
520
Tensile Strength: Ultimate (UTS), MPa 580 to 670
780
Tensile Strength: Yield (Proof), MPa 380 to 570
520

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 410
1000
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.6
Embodied Energy, MJ/kg 20
38
Embodied Water, L/kg 50
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
690
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20 to 24
28
Strength to Weight: Bending, points 20 to 22
25
Thermal Diffusivity, mm2/s 10
4.0
Thermal Shock Resistance, points 17 to 20
21

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.040
Chromium (Cr), % 0.4 to 0.6
21 to 22
Copper (Cu), % 0
0.1 to 0.8
Iron (Fe), % 96.5 to 97.7
67.2 to 73.3
Manganese (Mn), % 0.75 to 1.0
4.0 to 6.0
Molybdenum (Mo), % 0.2 to 0.3
0.1 to 0.8
Nickel (Ni), % 0.4 to 0.7
1.4 to 1.9
Nitrogen (N), % 0
0.2 to 0.25
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 0.015