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SAE-AISI A9 Steel vs. AWS E90C-B9

Both SAE-AISI A9 steel and AWS E90C-B9 are iron alloys. They have a very high 95% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A9 steel and the bottom bar is AWS E90C-B9.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
710

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 35
25
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
7.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.7
2.6
Embodied Energy, MJ/kg 70
37
Embodied Water, L/kg 82
91

Common Calculations

PREN (Pitting Resistance) 10
13
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 73
25
Strength to Weight: Bending, points 24 to 46
23
Thermal Diffusivity, mm2/s 9.6
6.9
Thermal Shock Resistance, points 25 to 66
20

Alloy Composition


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Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.45 to 0.55
0.080 to 0.13
Chromium (Cr), % 4.8 to 5.5
8.0 to 10.5
Copper (Cu), % 0 to 0.25
0 to 0.2
Iron (Fe), % 87 to 90.5
84.4 to 90.9
Manganese (Mn), % 0 to 0.5
0 to 1.2
Molybdenum (Mo), % 1.3 to 1.8
0.85 to 1.2
Nickel (Ni), % 1.3 to 1.8
0 to 0.8
Niobium (Nb), % 0
0.020 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 1.0 to 1.2
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0.8 to 1.4
0.15 to 0.3
Residuals, % 0
0 to 0.5