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SAE-AISI A9 Steel vs. S31060 Stainless Steel

Both SAE-AISI A9 steel and S31060 stainless steel are iron alloys. They have 72% 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 A9 steel and the bottom bar is S31060 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 74
78
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
680

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 35
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.7
3.4
Embodied Energy, MJ/kg 70
48
Embodied Water, L/kg 82
170

Common Calculations

PREN (Pitting Resistance) 10
26
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 73
24
Strength to Weight: Bending, points 24 to 46
22
Thermal Diffusivity, mm2/s 9.6
4.0
Thermal Shock Resistance, points 25 to 66
15

Alloy Composition

Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0.45 to 0.55
0.050 to 0.1
Cerium (Ce), % 0
0 to 0.070
Chromium (Cr), % 4.8 to 5.5
22 to 24
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87 to 90.5
61.4 to 67.8
Lanthanum (La), % 0
0 to 0.070
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 1.3 to 1.8
0
Nickel (Ni), % 1.3 to 1.8
10 to 12.5
Nitrogen (N), % 0
0.18 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 1.0 to 1.2
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.8 to 1.4
0