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SAE-AISI A2 Steel vs. S44660 Stainless Steel

Both SAE-AISI A2 steel and S44660 stainless steel are iron alloys. They have 73% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A2 steel and the bottom bar is S44660 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 74
81
Tensile Strength: Ultimate (UTS), MPa 710 to 2040
660

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 38
17
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.5
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 5.5
21
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.7
4.3
Embodied Energy, MJ/kg 38
61
Embodied Water, L/kg 73
180

Common Calculations

PREN (Pitting Resistance) 8.9
38
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 73
24
Strength to Weight: Bending, points 23 to 46
22
Thermal Diffusivity, mm2/s 10
4.5
Thermal Shock Resistance, points 25 to 71
21

Alloy Composition

Carbon (C), % 1.0 to 1.1
0 to 0.030
Chromium (Cr), % 4.8 to 5.5
25 to 28
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 89.4 to 93.3
60.4 to 71
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.4
3.0 to 4.0
Nickel (Ni), % 0 to 0.3
1.0 to 3.5
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.040
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.0
Vanadium (V), % 0.15 to 0.5
0