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SAE-AISI 4140 Steel vs. S82013 Stainless Steel

Both SAE-AISI 4140 steel and S82013 stainless steel are iron alloys. They have 76% 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 4140 steel and the bottom bar is S82013 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 310
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 26
34
Fatigue Strength, MPa 360 to 650
400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 410 to 660
470
Tensile Strength: Ultimate (UTS), MPa 690 to 1080
710
Tensile Strength: Yield (Proof), MPa 590 to 990
500

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
970
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 43
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
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
11
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.4
Embodied Energy, MJ/kg 20
34
Embodied Water, L/kg 51
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 180
220
Resilience: Unit (Modulus of Resilience), kJ/m3 920 to 2590
640
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 38
26
Strength to Weight: Bending, points 22 to 30
23
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 20 to 32
20

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.060
Chromium (Cr), % 0.8 to 1.1
19.5 to 22
Copper (Cu), % 0
0.2 to 1.2
Iron (Fe), % 96.8 to 97.8
70.5 to 77.1
Manganese (Mn), % 0.75 to 1.0
2.5 to 3.5
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0
0.5 to 1.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 0.9
Sulfur (S), % 0 to 0.040
0 to 0.030