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Grade N7M Nickel vs. Type 4 Magnetic Alloy

Both grade N7M nickel and Type 4 magnetic alloy are nickel alloys. They have 73% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade N7M nickel and the bottom bar is Type 4 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 22
2.0 to 40
Fatigue Strength, MPa 190
220 to 400
Poisson's Ratio 0.31
0.31
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 590
620 to 1100
Tensile Strength: Yield (Proof), MPa 310
270 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 900
900
Melting Completion (Liquidus), °C 1650
1420
Melting Onset (Solidus), °C 1590
1370
Specific Heat Capacity, J/kg-K 390
440
Thermal Expansion, µm/m-K 9.9
11

Otherwise Unclassified Properties

Base Metal Price, % relative 75
60
Density, g/cm3 9.3
8.8
Embodied Carbon, kg CO2/kg material 16
10
Embodied Energy, MJ/kg 200
140
Embodied Water, L/kg 270
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
22 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 220
190 to 2840
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 22
22
Strength to Weight: Axial, points 18
19 to 35
Strength to Weight: Bending, points 17
18 to 27
Thermal Shock Resistance, points 19
21 to 37

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.050
Chromium (Cr), % 0 to 1.0
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 3.0
9.5 to 17.5
Manganese (Mn), % 0 to 1.0
0 to 0.8
Molybdenum (Mo), % 30 to 33
3.5 to 6.0
Nickel (Ni), % 60.9 to 70
79 to 82
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.020