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Type 4 Magnetic Alloy vs. AWS E3155

Type 4 magnetic alloy belongs to the nickel alloys classification, while AWS E3155 belongs to the iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is Type 4 magnetic alloy and the bottom bar is AWS E3155.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 2.0 to 40
23
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 620 to 1100
770

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 440
450
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 60
70
Density, g/cm3 8.8
8.4
Embodied Carbon, kg CO2/kg material 10
7.7
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 210
300

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 19 to 35
26
Strength to Weight: Bending, points 18 to 27
22
Thermal Shock Resistance, points 21 to 37
20

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.1
Chromium (Cr), % 0 to 0.3
20 to 22.5
Cobalt (Co), % 0 to 0.5
18.5 to 21
Copper (Cu), % 0 to 0.3
0 to 0.75
Iron (Fe), % 9.5 to 17.5
23.3 to 36.3
Manganese (Mn), % 0 to 0.8
1.0 to 2.5
Molybdenum (Mo), % 3.5 to 6.0
2.5 to 3.5
Nickel (Ni), % 79 to 82
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0
2.0 to 3.0