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AWS ENiCu-7 vs. SAE-AISI P21 Steel

AWS ENiCu-7 belongs to the nickel alloys classification, while SAE-AISI P21 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AWS ENiCu-7 and the bottom bar is SAE-AISI P21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
190
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 62
73
Tensile Strength: Ultimate (UTS), MPa 550
1130

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Melting Completion (Liquidus), °C 1270
1450
Melting Onset (Solidus), °C 1230
1410
Specific Heat Capacity, J/kg-K 430
470
Thermal Conductivity, W/m-K 21
41
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.3
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 50
6.5
Density, g/cm3 8.7
7.9
Embodied Carbon, kg CO2/kg material 8.0
2.3
Embodied Energy, MJ/kg 110
32
Embodied Water, L/kg 250
62

Common Calculations

Stiffness to Weight: Axial, points 10
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 17
40
Strength to Weight: Bending, points 17
31
Thermal Diffusivity, mm2/s 5.5
11
Thermal Shock Resistance, points 18
37

Alloy Composition

Aluminum (Al), % 0 to 0.75
0
Carbon (C), % 0 to 0.1
0.18 to 0.22
Chromium (Cr), % 0
0 to 0.5
Cobalt (Co), % 0
1.1 to 1.3
Copper (Cu), % 20.6 to 38
0 to 0.25
Iron (Fe), % 0 to 2.5
92.1 to 94.2
Manganese (Mn), % 0 to 4.0
0.35 to 0.72
Nickel (Ni), % 62 to 69
3.9 to 4.3
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 1.5
0.2 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0 to 1.0
0
Vanadium (V), % 0
0.15 to 0.25
Residuals, % 0 to 0.5
0