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ACI-ASTM CN7M Steel vs. Grade CW6MC Nickel

ACI-ASTM CN7M steel belongs to the iron alloys classification, while grade CW6MC nickel belongs to the nickel alloys. They have 56% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7M steel and the bottom bar is grade CW6MC nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
28
Fatigue Strength, MPa 190
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 480
540
Tensile Strength: Yield (Proof), MPa 200
310

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1410
1480
Melting Onset (Solidus), °C 1450
1430
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 21
11
Thermal Expansion, µm/m-K 15
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 32
80
Density, g/cm3 8.1
8.6
Embodied Carbon, kg CO2/kg material 5.6
14
Embodied Energy, MJ/kg 78
200
Embodied Water, L/kg 210
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
130
Resilience: Unit (Modulus of Resilience), kJ/m3 110
240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 17
18
Strength to Weight: Bending, points 17
17
Thermal Diffusivity, mm2/s 5.6
2.8
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.060
Chromium (Cr), % 19 to 22
20 to 23
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
0 to 5.0
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
8.0 to 10
Nickel (Ni), % 27.5 to 30.5
55.4 to 68.9
Niobium (Nb), % 0
3.2 to 4.5
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030