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Type 4 Magnetic Alloy vs. ASTM Grade HE Steel

Type 4 magnetic alloy belongs to the nickel alloys classification, while ASTM grade HE steel belongs to the iron alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is Type 4 magnetic alloy and the bottom bar is ASTM grade HE steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 2.0 to 40
10
Fatigue Strength, MPa 220 to 400
160
Poisson's Ratio 0.31
0.27
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 620 to 1100
670
Tensile Strength: Yield (Proof), MPa 270 to 1040
310

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1370
1360
Specific Heat Capacity, J/kg-K 440
490
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 60
19
Density, g/cm3 8.8
7.7
Embodied Carbon, kg CO2/kg material 10
3.5
Embodied Energy, MJ/kg 140
50
Embodied Water, L/kg 210
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22 to 200
56
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 2840
240
Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 19 to 35
24
Strength to Weight: Bending, points 18 to 27
22
Thermal Shock Resistance, points 21 to 37
14

Alloy Composition

Carbon (C), % 0 to 0.050
0.2 to 0.5
Chromium (Cr), % 0 to 0.3
26 to 30
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 9.5 to 17.5
53.9 to 65.8
Manganese (Mn), % 0 to 0.8
0 to 2.0
Molybdenum (Mo), % 3.5 to 6.0
0 to 0.5
Nickel (Ni), % 79 to 82
8.0 to 11
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040