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SAE-AISI D7 Steel vs. Grade N7M Nickel

SAE-AISI D7 steel belongs to the iron alloys classification, while grade N7M nickel belongs to the nickel alloys. There are 19 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 SAE-AISI D7 steel and the bottom bar is grade N7M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 73
85
Tensile Strength: Ultimate (UTS), MPa 800 to 2120
590

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1440
1650
Melting Onset (Solidus), °C 1400
1590
Specific Heat Capacity, J/kg-K 480
390
Thermal Expansion, µm/m-K 11
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
75
Density, g/cm3 7.6
9.3
Embodied Carbon, kg CO2/kg material 11
16
Embodied Energy, MJ/kg 180
200
Embodied Water, L/kg 130
270

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 29 to 78
18
Strength to Weight: Bending, points 25 to 48
17
Thermal Shock Resistance, points 27 to 72
19

Alloy Composition

Carbon (C), % 2.2 to 2.5
0 to 0.070
Chromium (Cr), % 11.5 to 13.5
0 to 1.0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.6 to 81.9
0 to 3.0
Manganese (Mn), % 0 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.7 to 1.2
30 to 33
Nickel (Ni), % 0 to 0.3
60.9 to 70
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 3.8 to 4.4
0