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Grade N7M Nickel vs. S43940 Stainless Steel

Grade N7M nickel belongs to the nickel alloys classification, while S43940 stainless steel belongs to the iron alloys. There are 25 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 grade N7M nickel and the bottom bar is S43940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 22
21
Fatigue Strength, MPa 190
180
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 85
77
Tensile Strength: Ultimate (UTS), MPa 590
490
Tensile Strength: Yield (Proof), MPa 310
280

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 900
890
Melting Completion (Liquidus), °C 1650
1440
Melting Onset (Solidus), °C 1590
1400
Specific Heat Capacity, J/kg-K 390
480
Thermal Expansion, µm/m-K 9.9
10

Otherwise Unclassified Properties

Base Metal Price, % relative 75
12
Density, g/cm3 9.3
7.7
Embodied Carbon, kg CO2/kg material 16
2.6
Embodied Energy, MJ/kg 200
38
Embodied Water, L/kg 270
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
86
Resilience: Unit (Modulus of Resilience), kJ/m3 220
200
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 18
18
Strength to Weight: Bending, points 17
18
Thermal Shock Resistance, points 19
18

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 0 to 1.0
17.5 to 18.5
Iron (Fe), % 0 to 3.0
78.2 to 82.1
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 30 to 33
0
Nickel (Ni), % 60.9 to 70
0
Niobium (Nb), % 0
0.3 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0.1 to 0.6