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SAE-AISI A8 Steel vs. AWS E3155

Both SAE-AISI A8 steel and AWS E3155 are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A8 steel and the bottom bar is AWS E3155.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
81
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
770

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 37
13
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
70
Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 2.3
7.7
Embodied Energy, MJ/kg 31
110
Embodied Water, L/kg 73
300

Common Calculations

PREN (Pitting Resistance) 12
35
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 68
26
Strength to Weight: Bending, points 22 to 44
22
Thermal Diffusivity, mm2/s 9.9
3.3
Thermal Shock Resistance, points 22 to 62
20

Alloy Composition

Carbon (C), % 0.5 to 0.6
0 to 0.1
Chromium (Cr), % 4.8 to 5.5
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0 to 0.25
0 to 0.75
Iron (Fe), % 88.5 to 91.9
23.3 to 36.3
Manganese (Mn), % 0 to 0.5
1.0 to 2.5
Molybdenum (Mo), % 1.2 to 1.7
2.5 to 3.5
Nickel (Ni), % 0 to 0.3
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.75 to 1.1
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.0 to 1.5
2.0 to 3.0