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ACI-ASTM CN7MS Steel vs. Grade M30C Nickel

ACI-ASTM CN7MS steel belongs to the iron alloys classification, while grade M30C nickel belongs to the nickel alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 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 M30C nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
160
Elongation at Break, % 39
29
Fatigue Strength, MPa 200
170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
61
Tensile Strength: Ultimate (UTS), MPa 540
510
Tensile Strength: Yield (Proof), MPa 230
250

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 1040
900
Melting Completion (Liquidus), °C 1400
1290
Melting Onset (Solidus), °C 1350
1240
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 12
22
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 28
60
Density, g/cm3 7.9
8.8
Embodied Carbon, kg CO2/kg material 5.1
9.5
Embodied Energy, MJ/kg 71
140
Embodied Water, L/kg 180
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
120
Resilience: Unit (Modulus of Resilience), kJ/m3 140
200
Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 19
16
Strength to Weight: Bending, points 19
16
Thermal Diffusivity, mm2/s 3.2
5.7
Thermal Shock Resistance, points 13
18

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.3
Chromium (Cr), % 18 to 20
0
Copper (Cu), % 1.5 to 2.0
26 to 33
Iron (Fe), % 45.4 to 53.5
0 to 3.5
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 22 to 25
56.6 to 72
Niobium (Nb), % 0
1.0 to 3.0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 2.5 to 3.5
1.0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.030