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SAE-AISI 4140 Steel vs. S30601 Stainless Steel

Both SAE-AISI 4140 steel and S30601 stainless steel are iron alloys. They have 61% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4140 steel and the bottom bar is S30601 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 310
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 26
37
Fatigue Strength, MPa 360 to 650
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Shear Strength, MPa 410 to 660
450
Tensile Strength: Ultimate (UTS), MPa 690 to 1080
660
Tensile Strength: Yield (Proof), MPa 590 to 990
300

Thermal Properties

Latent Heat of Fusion, J/g 250
370
Maximum Temperature: Mechanical, °C 420
950
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
20
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 1.5
3.9
Embodied Energy, MJ/kg 20
55
Embodied Water, L/kg 51
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 180
200
Resilience: Unit (Modulus of Resilience), kJ/m3 920 to 2590
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 38
24
Strength to Weight: Bending, points 22 to 30
22
Thermal Shock Resistance, points 20 to 32
16

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.015
Chromium (Cr), % 0.8 to 1.1
17 to 18
Copper (Cu), % 0
0 to 0.35
Iron (Fe), % 96.8 to 97.8
56.9 to 60.5
Manganese (Mn), % 0.75 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0.15 to 0.25
0 to 0.2
Nickel (Ni), % 0
17 to 18
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
5.0 to 5.6
Sulfur (S), % 0 to 0.040
0 to 0.013