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SAE-AISI A9 Steel vs. AWS E70C-Ni2

Both SAE-AISI A9 steel and AWS E70C-Ni2 are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (5, 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 E70C-Ni2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
72
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
560

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 35
52
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
3.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.7
1.6
Embodied Energy, MJ/kg 70
22
Embodied Water, L/kg 82
51

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 73
20
Strength to Weight: Bending, points 24 to 46
19
Thermal Diffusivity, mm2/s 9.6
14
Thermal Shock Resistance, points 25 to 66
17

Alloy Composition


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Carbon (C), % 0.45 to 0.55
0 to 0.080
Chromium (Cr), % 4.8 to 5.5
0
Copper (Cu), % 0 to 0.25
0 to 0.35
Iron (Fe), % 87 to 90.5
94.1 to 98.3
Manganese (Mn), % 0 to 0.5
0 to 1.3
Molybdenum (Mo), % 1.3 to 1.8
0
Nickel (Ni), % 1.3 to 1.8
1.8 to 2.8
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 1.0 to 1.2
0 to 0.9
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.8 to 1.4
0 to 0.030
Residuals, % 0
0 to 0.5