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SAE-AISI 5140 Steel vs. EN 1.4874 Stainless Steel

Both SAE-AISI 5140 steel and EN 1.4874 stainless steel are iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 5140 steel and the bottom bar is EN 1.4874 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 290
140
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 12 to 29
6.7
Fatigue Strength, MPa 220 to 570
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 560 to 970
480
Tensile Strength: Yield (Proof), MPa 290 to 840
360

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1150
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 45
13
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 1.4
7.6
Embodied Energy, MJ/kg 19
110
Embodied Water, L/kg 49
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 76 to 180
29
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1880
310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 34
16
Strength to Weight: Bending, points 19 to 28
16
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 16 to 29
11

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.35 to 0.65
Chromium (Cr), % 0.7 to 0.9
19 to 22
Cobalt (Co), % 0
18.5 to 22
Iron (Fe), % 97.3 to 98.1
23 to 38.9
Manganese (Mn), % 0.7 to 0.9
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 0
18 to 22
Niobium (Nb), % 0
0.75 to 1.3
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 0.030
Tungsten (W), % 0
2.0 to 3.0