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SAE-AISI 4140 Steel vs. S30600 Stainless Steel

Both SAE-AISI 4140 steel and S30600 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 4140 steel and the bottom bar is S30600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 310
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 26
45
Fatigue Strength, MPa 360 to 650
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 410 to 660
430
Tensile Strength: Ultimate (UTS), MPa 690 to 1080
610
Tensile Strength: Yield (Proof), MPa 590 to 990
270

Thermal Properties

Latent Heat of Fusion, J/g 250
350
Maximum Temperature: Mechanical, °C 420
950
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1420
1330
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 43
14
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
19
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 1.5
3.6
Embodied Energy, MJ/kg 20
51
Embodied Water, L/kg 51
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 180
220
Resilience: Unit (Modulus of Resilience), kJ/m3 920 to 2590
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 38
22
Strength to Weight: Bending, points 22 to 30
21
Thermal Diffusivity, mm2/s 12
3.7
Thermal Shock Resistance, points 20 to 32
14

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.018
Chromium (Cr), % 0.8 to 1.1
17 to 18.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 96.8 to 97.8
58.9 to 65.3
Manganese (Mn), % 0.75 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.15 to 0.25
0 to 0.2
Nickel (Ni), % 0
14 to 15.5
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0.15 to 0.35
3.7 to 4.3
Sulfur (S), % 0 to 0.040
0 to 0.020