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Type 4 Magnetic Alloy vs. ACI-ASTM CG6MMN Steel

Type 4 magnetic alloy belongs to the nickel alloys classification, while ACI-ASTM CG6MMN steel belongs to the iron alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 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 ACI-ASTM CG6MMN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 2.0 to 40
34
Fatigue Strength, MPa 220 to 400
260
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 620 to 1100
670
Tensile Strength: Yield (Proof), MPa 270 to 1040
320

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Mechanical, °C 900
1080
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1370
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 11
17

Otherwise Unclassified Properties

Base Metal Price, % relative 60
22
Density, g/cm3 8.8
7.8
Embodied Carbon, kg CO2/kg material 10
4.8
Embodied Energy, MJ/kg 140
68
Embodied Water, L/kg 210
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22 to 200
190
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 2840
260
Stiffness to Weight: Axial, points 12
14
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 to 0.060
Chromium (Cr), % 0 to 0.3
20.5 to 23.5
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 9.5 to 17.5
51.9 to 62.1
Manganese (Mn), % 0 to 0.8
4.0 to 6.0
Molybdenum (Mo), % 3.5 to 6.0
1.5 to 3.0
Nickel (Ni), % 79 to 82
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
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
Vanadium (V), % 0
0.1 to 0.3