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ACI-ASTM CN7M Steel vs. Grade CW6M Nickel

ACI-ASTM CN7M steel belongs to the iron alloys classification, while grade CW6M nickel belongs to the nickel alloys. They have 53% of their average alloy composition in common. 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 ACI-ASTM CN7M steel and the bottom bar is grade CW6M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 44
29
Fatigue Strength, MPa 190
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
84
Tensile Strength: Ultimate (UTS), MPa 480
560
Tensile Strength: Yield (Proof), MPa 200
310

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Maximum Temperature: Mechanical, °C 1100
970
Melting Completion (Liquidus), °C 1410
1530
Melting Onset (Solidus), °C 1450
1470
Specific Heat Capacity, J/kg-K 470
430
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 32
65
Density, g/cm3 8.1
8.8
Embodied Carbon, kg CO2/kg material 5.6
13
Embodied Energy, MJ/kg 78
170
Embodied Water, L/kg 210
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
140
Resilience: Unit (Modulus of Resilience), kJ/m3 110
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 17
18
Strength to Weight: Bending, points 17
17
Thermal Shock Resistance, points 12
16

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.070
Chromium (Cr), % 19 to 22
17 to 20
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
0 to 3.0
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
17 to 20
Nickel (Ni), % 27.5 to 30.5
54.9 to 66
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030