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EN 1.4031 Stainless Steel vs. Grade N7M Nickel

EN 1.4031 stainless steel belongs to the iron alloys classification, while grade N7M nickel belongs to the nickel alloys. 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 EN 1.4031 stainless steel and the bottom bar is grade N7M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 11 to 13
22
Fatigue Strength, MPa 220 to 400
190
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 76
85
Tensile Strength: Ultimate (UTS), MPa 670 to 900
590
Tensile Strength: Yield (Proof), MPa 390 to 730
310

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Maximum Temperature: Mechanical, °C 770
900
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 7.0
75
Density, g/cm3 7.7
9.3
Embodied Carbon, kg CO2/kg material 1.9
16
Embodied Energy, MJ/kg 27
200
Embodied Water, L/kg 100
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 94
110
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 24 to 32
18
Strength to Weight: Bending, points 22 to 27
17
Thermal Shock Resistance, points 23 to 32
19

Alloy Composition

Carbon (C), % 0.36 to 0.42
0 to 0.070
Chromium (Cr), % 12.5 to 14.5
0 to 1.0
Iron (Fe), % 83 to 87.1
0 to 3.0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
30 to 33
Nickel (Ni), % 0
60.9 to 70
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030