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SAE-AISI 6150 Steel vs. S44401 Stainless Steel

Both SAE-AISI 6150 steel and S44401 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 30 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 6150 steel and the bottom bar is S44401 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 15 to 23
21
Fatigue Strength, MPa 300 to 750
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 400 to 730
300
Tensile Strength: Ultimate (UTS), MPa 630 to 1200
480
Tensile Strength: Yield (Proof), MPa 420 to 1160
300

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
930
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
22
Thermal Expansion, µm/m-K 12 to 13
10

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 2.3
12
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.9
Embodied Energy, MJ/kg 28
40
Embodied Water, L/kg 51
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
90
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3590
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 43
17
Strength to Weight: Bending, points 21 to 32
18
Thermal Diffusivity, mm2/s 13
5.9
Thermal Shock Resistance, points 20 to 38
17

Alloy Composition

Carbon (C), % 0.48 to 0.53
0 to 0.025
Chromium (Cr), % 0.8 to 1.1
17.5 to 19.5
Iron (Fe), % 96.7 to 97.7
75.1 to 80.6
Manganese (Mn), % 0.7 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 0
0 to 1.0
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8
Vanadium (V), % 0.15 to 0.3
0