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AWS ENiCu-7 vs. ASTM A232 Spring Steel

AWS ENiCu-7 belongs to the nickel alloys classification, while ASTM A232 spring steel belongs to the iron alloys. There are 24 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 AWS ENiCu-7 and the bottom bar is ASTM A232 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
190
Elongation at Break, % 34
14
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 62
73
Tensile Strength: Ultimate (UTS), MPa 550
1790

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Melting Completion (Liquidus), °C 1270
1460
Melting Onset (Solidus), °C 1230
1410
Specific Heat Capacity, J/kg-K 430
470
Thermal Conductivity, W/m-K 21
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.3
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 50
2.3
Density, g/cm3 8.7
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.0
Embodied Energy, MJ/kg 110
28
Embodied Water, L/kg 250
51

Common Calculations

Stiffness to Weight: Axial, points 10
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 17
64
Strength to Weight: Bending, points 17
42
Thermal Diffusivity, mm2/s 5.5
14
Thermal Shock Resistance, points 18
53

Alloy Composition

Aluminum (Al), % 0 to 0.75
0
Carbon (C), % 0 to 0.1
0.48 to 0.53
Chromium (Cr), % 0
0.8 to 1.1
Copper (Cu), % 20.6 to 38
0
Iron (Fe), % 0 to 2.5
96.8 to 97.7
Manganese (Mn), % 0 to 4.0
0.7 to 0.9
Nickel (Ni), % 62 to 69
0
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 1.5
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.035
Titanium (Ti), % 0 to 1.0
0
Vanadium (V), % 0
0.15 to 0.3
Residuals, % 0 to 0.5
0