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SAE-AISI O2 Steel vs. AISI 334 Stainless Steel

Both SAE-AISI O2 steel and AISI 334 stainless steel are iron alloys. They have 60% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (15, 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 334 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 640 to 2050
540

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1450
1410
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
22
Density, g/cm3 7.8
7.9
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
19
Strength to Weight: Bending, points 21 to 46
19
Thermal Shock Resistance, points 22 to 70
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.85 to 1.0
0 to 0.080
Chromium (Cr), % 0 to 0.5
18 to 20
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 95 to 97.8
55.7 to 62.7
Manganese (Mn), % 1.4 to 1.8
0 to 1.0
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 0.3
19 to 21
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6
Vanadium (V), % 0 to 0.3
0