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SAE-AISI P21 Steel vs. ZA-27

SAE-AISI P21 steel belongs to the iron alloys classification, while ZA-27 belongs to the zinc alloys. There are 23 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI P21 steel and the bottom bar is ZA-27.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
78
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
31
Tensile Strength: Ultimate (UTS), MPa 1130
400 to 430

Thermal Properties

Latent Heat of Fusion, J/g 250
130
Melting Completion (Liquidus), °C 1450
480
Melting Onset (Solidus), °C 1410
380
Specific Heat Capacity, J/kg-K 470
530
Thermal Conductivity, W/m-K 41
130
Thermal Expansion, µm/m-K 12
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
30
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
53

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
11
Density, g/cm3 7.9
5.0
Embodied Carbon, kg CO2/kg material 2.3
4.2
Embodied Energy, MJ/kg 32
80
Embodied Water, L/kg 62
570

Common Calculations

Stiffness to Weight: Axial, points 13
8.6
Stiffness to Weight: Bending, points 24
28
Strength to Weight: Axial, points 40
22 to 24
Strength to Weight: Bending, points 31
24 to 25
Thermal Diffusivity, mm2/s 11
47
Thermal Shock Resistance, points 37
14 to 15

Alloy Composition

Aluminum (Al), % 0
25 to 28
Cadmium (Cd), % 0
0 to 0.0060
Carbon (C), % 0.18 to 0.22
0
Chromium (Cr), % 0 to 0.5
0
Cobalt (Co), % 1.1 to 1.3
0
Copper (Cu), % 0 to 0.25
2.0 to 2.5
Iron (Fe), % 92.1 to 94.2
0 to 0.1
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.010 to 0.020
Manganese (Mn), % 0.35 to 0.72
0
Nickel (Ni), % 3.9 to 4.3
0 to 0.020
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.4
0 to 0.080
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.0030
Vanadium (V), % 0.15 to 0.25
0
Zinc (Zn), % 0
69.3 to 73