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EN 1.7321 Steel vs. Grade N7M Nickel

EN 1.7321 steel belongs to the iron alloys classification, while grade N7M nickel belongs to the nickel alloys. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 1.7321 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 0.29
0.31
Shear Modulus, GPa 73
85
Tensile Strength: Ultimate (UTS), MPa 490 to 1460
590

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 410
900
Melting Completion (Liquidus), °C 1460
1650
Melting Onset (Solidus), °C 1420
1590
Specific Heat Capacity, J/kg-K 470
390
Thermal Expansion, µm/m-K 13
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
75
Density, g/cm3 7.9
9.3
Embodied Carbon, kg CO2/kg material 1.5
16
Embodied Energy, MJ/kg 20
200
Embodied Water, L/kg 50
270

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 17 to 52
18
Strength to Weight: Bending, points 18 to 36
17
Thermal Shock Resistance, points 14 to 43
19

Alloy Composition

Carbon (C), % 0.17 to 0.23
0 to 0.070
Chromium (Cr), % 0.3 to 0.6
0 to 1.0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 97.1 to 98.4
0 to 3.0
Manganese (Mn), % 0.7 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.5
30 to 33
Nickel (Ni), % 0
60.9 to 70
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030