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Z21721 Zinc vs. ASTM A387 Grade 21 Steel

Z21721 zinc belongs to the zinc alloys classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 28 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 Z21721 zinc and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
190
Elongation at Break, % 40
21
Poisson's Ratio 0.25
0.29
Shear Modulus, GPa 35
74
Tensile Strength: Ultimate (UTS), MPa 150
500 to 590
Tensile Strength: Yield (Proof), MPa 120
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 110
260
Maximum Temperature: Mechanical, °C 90
480
Melting Completion (Liquidus), °C 410
1470
Melting Onset (Solidus), °C 390
1430
Specific Heat Capacity, J/kg-K 390
470
Thermal Conductivity, W/m-K 110
41
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 37
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 11
4.1
Density, g/cm3 6.6
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.8
Embodied Energy, MJ/kg 53
23
Embodied Water, L/kg 340
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 88
140 to 320
Stiffness to Weight: Axial, points 7.3
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 6.4
18 to 21
Strength to Weight: Bending, points 9.6
18 to 20
Thermal Diffusivity, mm2/s 44
11
Thermal Shock Resistance, points 4.8
14 to 17

Alloy Composition

Aluminum (Al), % 0 to 0.0020
0
Cadmium (Cd), % 0 to 0.070
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
2.8 to 3.3
Copper (Cu), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.010
94.4 to 96
Lead (Pb), % 0 to 1.0
0
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.020
0
Zinc (Zn), % 98.9 to 100
0