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Grade N7M Nickel vs. SAE-AISI 5140 Steel

Grade N7M nickel belongs to the nickel alloys classification, while SAE-AISI 5140 steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade N7M nickel and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 22
12 to 29
Fatigue Strength, MPa 190
220 to 570
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 590
560 to 970
Tensile Strength: Yield (Proof), MPa 310
290 to 840

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 900
420
Melting Completion (Liquidus), °C 1650
1460
Melting Onset (Solidus), °C 1590
1420
Specific Heat Capacity, J/kg-K 390
470
Thermal Expansion, µm/m-K 9.9
13

Otherwise Unclassified Properties

Base Metal Price, % relative 75
2.1
Density, g/cm3 9.3
7.8
Embodied Carbon, kg CO2/kg material 16
1.4
Embodied Energy, MJ/kg 200
19
Embodied Water, L/kg 270
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
76 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 220
220 to 1880
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 18
20 to 34
Strength to Weight: Bending, points 17
19 to 28
Thermal Shock Resistance, points 19
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.070
0.38 to 0.43
Chromium (Cr), % 0 to 1.0
0.7 to 0.9
Iron (Fe), % 0 to 3.0
97.3 to 98.1
Manganese (Mn), % 0 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 30 to 33
0
Nickel (Ni), % 60.9 to 70
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040