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SAE-AISI 4140 Steel vs. S13800 Stainless Steel

Both SAE-AISI 4140 steel and S13800 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4140 steel and the bottom bar is S13800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 310
290 to 480
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 26
11 to 18
Fatigue Strength, MPa 360 to 650
410 to 870
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 410 to 660
610 to 1030
Tensile Strength: Ultimate (UTS), MPa 690 to 1080
980 to 1730
Tensile Strength: Yield (Proof), MPa 590 to 990
660 to 1580

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
810
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 43
16
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
15
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
3.4
Embodied Energy, MJ/kg 20
46
Embodied Water, L/kg 51
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 180
150 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 920 to 2590
1090 to 5490
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 38
35 to 61
Strength to Weight: Bending, points 22 to 30
28 to 41
Thermal Diffusivity, mm2/s 12
4.3
Thermal Shock Resistance, points 20 to 32
33 to 58

Alloy Composition

Aluminum (Al), % 0
0.9 to 1.4
Carbon (C), % 0.38 to 0.43
0 to 0.050
Chromium (Cr), % 0.8 to 1.1
12.3 to 13.2
Iron (Fe), % 96.8 to 97.8
73.6 to 77.3
Manganese (Mn), % 0.75 to 1.0
0 to 0.2
Molybdenum (Mo), % 0.15 to 0.25
2.0 to 3.0
Nickel (Ni), % 0
7.5 to 8.5
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.035
0 to 0.010
Silicon (Si), % 0.15 to 0.35
0 to 0.1
Sulfur (S), % 0 to 0.040
0 to 0.0080