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EN 1.4512 Stainless Steel vs. SAE-AISI 5140 Steel

Both EN 1.4512 stainless steel and SAE-AISI 5140 steel are iron alloys. They have 89% 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 1.4512 stainless steel and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 28
12 to 29
Fatigue Strength, MPa 180
220 to 570
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 310
360 to 600
Tensile Strength: Ultimate (UTS), MPa 470
560 to 970
Tensile Strength: Yield (Proof), MPa 240
290 to 840

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 720
420
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
45
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.4
Embodied Energy, MJ/kg 27
19
Embodied Water, L/kg 95
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
76 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 150
220 to 1880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
20 to 34
Strength to Weight: Bending, points 17
19 to 28
Thermal Diffusivity, mm2/s 6.7
12
Thermal Shock Resistance, points 17
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 10.5 to 12.5
0.7 to 0.9
Iron (Fe), % 84.8 to 89.5
97.3 to 98.1
Manganese (Mn), % 0 to 1.0
0.7 to 0.9
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040
Titanium (Ti), % 0 to 0.65
0