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SAE-AISI 5140 Steel vs. S32750 Stainless Steel

Both SAE-AISI 5140 steel and S32750 stainless steel are iron alloys. They have 64% 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 5140 steel and the bottom bar is S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 290
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 12 to 29
17
Fatigue Strength, MPa 220 to 570
360
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Shear Strength, MPa 360 to 600
530
Tensile Strength: Ultimate (UTS), MPa 560 to 970
860
Tensile Strength: Yield (Proof), MPa 290 to 840
590

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 45
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
4.1
Embodied Energy, MJ/kg 19
56
Embodied Water, L/kg 49
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 76 to 180
130
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1880
860
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20 to 34
31
Strength to Weight: Bending, points 19 to 28
26
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 16 to 29
25

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.030
Chromium (Cr), % 0.7 to 0.9
24 to 26
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 97.3 to 98.1
58.1 to 66.8
Manganese (Mn), % 0.7 to 0.9
0 to 1.2
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.15 to 0.35
0 to 0.8
Sulfur (S), % 0 to 0.040
0 to 0.020