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ASTM A227 Spring Steel vs. Z21721 Zinc

ASTM A227 spring steel belongs to the iron alloys classification, while Z21721 zinc belongs to the zinc alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is Z21721 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
87
Elongation at Break, % 12
40
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 72
35
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
150
Tensile Strength: Yield (Proof), MPa 1430 to 1850
120

Thermal Properties

Latent Heat of Fusion, J/g 250
110
Maximum Temperature: Mechanical, °C 400
90
Melting Completion (Liquidus), °C 1450
410
Melting Onset (Solidus), °C 1410
390
Specific Heat Capacity, J/kg-K 470
390
Thermal Conductivity, W/m-K 52
110
Thermal Expansion, µm/m-K 12
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
27
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
37

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
11
Density, g/cm3 7.8
6.6
Embodied Carbon, kg CO2/kg material 1.4
2.8
Embodied Energy, MJ/kg 19
53
Embodied Water, L/kg 46
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
57
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 61 to 79
6.4
Strength to Weight: Bending, points 41 to 48
9.6
Thermal Diffusivity, mm2/s 14
44
Thermal Shock Resistance, points 55 to 71
4.8

Alloy Composition

Aluminum (Al), % 0
0 to 0.0020
Cadmium (Cd), % 0
0 to 0.070
Carbon (C), % 0.45 to 0.85
0
Copper (Cu), % 0
0 to 0.0050
Iron (Fe), % 97.4 to 99.1
0 to 0.010
Lead (Pb), % 0
0 to 1.0
Manganese (Mn), % 0.3 to 1.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.050
0
Titanium (Ti), % 0
0 to 0.020
Zinc (Zn), % 0
98.9 to 100