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SAE-AISI O2 Steel vs. AISI 309HCb Stainless Steel

Both SAE-AISI O2 steel and AISI 309HCb stainless steel are iron alloys. They have 63% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O2 steel and the bottom bar is AISI 309HCb 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
78
Tensile Strength: Ultimate (UTS), MPa 640 to 2050
590

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 43
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
23
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
4.1
Embodied Energy, MJ/kg 26
59
Embodied Water, L/kg 50
170

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 73
21
Strength to Weight: Bending, points 21 to 46
20
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 22 to 70
13

Alloy Composition

Carbon (C), % 0.85 to 1.0
0.040 to 0.1
Chromium (Cr), % 0 to 0.5
22 to 24
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 95 to 97.8
56 to 66
Manganese (Mn), % 1.4 to 1.8
0 to 2.0
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 0.3
12 to 16
Niobium (Nb), % 0
0 to 1.1
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0 to 0.3
0