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EN 1.4005 Stainless Steel vs. SAE-AISI 4140 Steel

Both EN 1.4005 stainless steel and SAE-AISI 4140 steel are iron alloys. They have 87% 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 EN 1.4005 stainless steel and the bottom bar is SAE-AISI 4140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13 to 21
11 to 26
Fatigue Strength, MPa 240 to 290
360 to 650
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 390 to 450
410 to 660
Tensile Strength: Ultimate (UTS), MPa 630 to 750
690 to 1080
Tensile Strength: Yield (Proof), MPa 370 to 500
590 to 990

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 760
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
43
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
2.4
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.5
Embodied Energy, MJ/kg 28
20
Embodied Water, L/kg 100
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 110
74 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 350 to 650
920 to 2590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23 to 27
25 to 38
Strength to Weight: Bending, points 21 to 24
22 to 30
Thermal Diffusivity, mm2/s 8.1
12
Thermal Shock Resistance, points 23 to 27
20 to 32

Alloy Composition

Carbon (C), % 0.060 to 0.15
0.38 to 0.43
Chromium (Cr), % 12 to 14
0.8 to 1.1
Iron (Fe), % 82.4 to 87.8
96.8 to 97.8
Manganese (Mn), % 0 to 1.5
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.6
0.15 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0.15 to 0.35
0 to 0.040

Comparable Variants