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AISI 321H Stainless Steel vs. SAE-AISI O6 Steel

Both AISI 321H stainless steel and SAE-AISI O6 steel are iron alloys. They have 71% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is AISI 321H stainless steel and the bottom bar is SAE-AISI O6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
180
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
71
Tensile Strength: Ultimate (UTS), MPa 580
670 to 2070

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
43
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 16
2.3
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.2
1.5
Embodied Energy, MJ/kg 46
21
Embodied Water, L/kg 140
47

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
24 to 74
Strength to Weight: Bending, points 20
22 to 47
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 12
22 to 69

Alloy Composition

Carbon (C), % 0.040 to 0.1
1.3 to 1.6
Chromium (Cr), % 17 to 19
0 to 0.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 65.4 to 74
94.6 to 97.7
Manganese (Mn), % 0 to 2.0
0.3 to 1.1
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 9.0 to 12
0 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.75
0.55 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.7
0