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SAE-AISI O7 Steel vs. S35500 Stainless Steel

Both SAE-AISI O7 steel and S35500 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O7 steel and the bottom bar is S35500 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 73
78
Tensile Strength: Ultimate (UTS), MPa 680 to 2110
1330 to 1490

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
16
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.3
3.5
Embodied Energy, MJ/kg 33
47
Embodied Water, L/kg 52
130

Common Calculations

PREN (Pitting Resistance) 3.6
27
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 74
47 to 53
Strength to Weight: Bending, points 22 to 46
34 to 37
Thermal Diffusivity, mm2/s 11
4.4
Thermal Shock Resistance, points 23 to 70
44 to 49

Alloy Composition

Carbon (C), % 1.1 to 1.3
0.1 to 0.15
Chromium (Cr), % 0.35 to 0.85
15 to 16
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92.9 to 97.6
73.2 to 77.7
Manganese (Mn), % 0 to 1.0
0.5 to 1.3
Molybdenum (Mo), % 0 to 0.3
2.5 to 3.2
Nickel (Ni), % 0 to 0.3
4.0 to 5.0
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0
0.070 to 0.13
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.0 to 2.0
0
Vanadium (V), % 0 to 0.4
0