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ACI-ASTM CN7MS Steel vs. Grade CW2M Nickel

ACI-ASTM CN7MS steel belongs to the iron alloys classification, while grade CW2M nickel belongs to the nickel alloys. They have 44% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is grade CW2M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 39
23
Fatigue Strength, MPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
83
Tensile Strength: Ultimate (UTS), MPa 540
560
Tensile Strength: Yield (Proof), MPa 230
310

Thermal Properties

Latent Heat of Fusion, J/g 340
330
Maximum Temperature: Mechanical, °C 1040
960
Melting Completion (Liquidus), °C 1400
1520
Melting Onset (Solidus), °C 1350
1460
Specific Heat Capacity, J/kg-K 480
430
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 28
70
Density, g/cm3 7.9
8.8
Embodied Carbon, kg CO2/kg material 5.1
12
Embodied Energy, MJ/kg 71
170
Embodied Water, L/kg 180
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 19
17
Thermal Shock Resistance, points 13
16

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.020
Chromium (Cr), % 18 to 20
15 to 17.5
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
0 to 2.0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.0
15 to 17.5
Nickel (Ni), % 22 to 25
60.1 to 70
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 2.5 to 3.5
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
0 to 1.0