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ACI-ASTM CN7MS Steel vs. Type 4 Magnetic Alloy

ACI-ASTM CN7MS steel belongs to the iron alloys classification, while Type 4 magnetic alloy belongs to the nickel alloys. They have 41% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is Type 4 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
2.0 to 40
Fatigue Strength, MPa 200
220 to 400
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 540
620 to 1100
Tensile Strength: Yield (Proof), MPa 230
270 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 1040
900
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1350
1370
Specific Heat Capacity, J/kg-K 480
440
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 28
60
Density, g/cm3 7.9
8.8
Embodied Carbon, kg CO2/kg material 5.1
10
Embodied Energy, MJ/kg 71
140
Embodied Water, L/kg 180
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
22 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 140
190 to 2840
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 19
19 to 35
Strength to Weight: Bending, points 19
18 to 27
Thermal Shock Resistance, points 13
21 to 37

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.050
Chromium (Cr), % 18 to 20
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 1.5 to 2.0
0 to 0.3
Iron (Fe), % 45.4 to 53.5
9.5 to 17.5
Manganese (Mn), % 0 to 1.0
0 to 0.8
Molybdenum (Mo), % 2.5 to 3.0
3.5 to 6.0
Nickel (Ni), % 22 to 25
79 to 82
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 2.5 to 3.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.020