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SAE-AISI 81B45 Steel vs. AWS E80C-B2

Both SAE-AISI 81B45 steel and AWS E80C-B2 are iron alloys. They have a very high 98% of their average alloy composition in common. There are 27 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 81B45 steel and the bottom bar is AWS E80C-B2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 24
22
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 540 to 670
630
Tensile Strength: Yield (Proof), MPa 350 to 560
530

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
39
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
3.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.6
Embodied Energy, MJ/kg 20
22
Embodied Water, L/kg 49
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 110
130
Resilience: Unit (Modulus of Resilience), kJ/m3 320 to 840
740
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 24
22
Strength to Weight: Bending, points 19 to 22
21
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 17 to 21
18

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.43 to 0.48
0.050 to 0.12
Chromium (Cr), % 0.35 to 0.55
1.0 to 1.5
Iron (Fe), % 97 to 98
95.3 to 97.9
Manganese (Mn), % 0.75 to 1.0
0.4 to 1.0
Molybdenum (Mo), % 0.080 to 0.15
0.4 to 0.65
Nickel (Ni), % 0.2 to 0.4
0 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.25 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Vanadium (V), % 0
0 to 0.030
Residuals, % 0
0 to 0.5