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SAE-AISI S6 Steel vs. S31730 Stainless Steel

Both SAE-AISI S6 steel and S31730 stainless steel are iron alloys. They have 60% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI S6 steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Tensile Strength: Ultimate (UTS), MPa 670 to 1920
540

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2
24
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.3
4.6
Embodied Energy, MJ/kg 33
63
Embodied Water, L/kg 56
180

Common Calculations

PREN (Pitting Resistance) 2.7
30
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24 to 70
19
Strength to Weight: Bending, points 22 to 45
18
Thermal Shock Resistance, points 22 to 64
12

Alloy Composition

Carbon (C), % 0.4 to 0.5
0 to 0.030
Chromium (Cr), % 1.2 to 1.5
17 to 19
Copper (Cu), % 0 to 0.25
4.0 to 5.0
Iron (Fe), % 92.8 to 94.7
52.4 to 61
Manganese (Mn), % 1.2 to 1.5
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.5
3.0 to 4.0
Nickel (Ni), % 0
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
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 0.010
Vanadium (V), % 0.2 to 0.4
0