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SAE-AISI S6 Steel vs. S40930 Stainless Steel

Both SAE-AISI S6 steel and S40930 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI S6 steel and the bottom bar is S40930 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Tensile Strength: Ultimate (UTS), MPa 670 to 1920
430

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 41
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2
8.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
2.3
Embodied Energy, MJ/kg 33
32
Embodied Water, L/kg 56
94

Common Calculations

PREN (Pitting Resistance) 2.7
11
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 70
16
Strength to Weight: Bending, points 22 to 45
16
Thermal Diffusivity, mm2/s 11
6.7
Thermal Shock Resistance, points 22 to 64
16

Alloy Composition

Carbon (C), % 0.4 to 0.5
0 to 0.030
Chromium (Cr), % 1.2 to 1.5
10.5 to 11.7
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92.8 to 94.7
84.7 to 89.4
Manganese (Mn), % 1.2 to 1.5
0 to 1.0
Molybdenum (Mo), % 0.3 to 0.5
0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0.080 to 0.75
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 2.0 to 2.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0.050 to 0.2
Vanadium (V), % 0.2 to 0.4
0