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SAE-AISI P21 Steel vs. ZA-8

SAE-AISI P21 steel belongs to the iron alloys classification, while ZA-8 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-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
85 to 86
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 73
34
Tensile Strength: Ultimate (UTS), MPa 1130
210 to 370

Thermal Properties

Latent Heat of Fusion, J/g 250
110
Melting Completion (Liquidus), °C 1450
400
Melting Onset (Solidus), °C 1410
380
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 41
120
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
28
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
40

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
11
Density, g/cm3 7.9
6.3
Embodied Carbon, kg CO2/kg material 2.3
3.3
Embodied Energy, MJ/kg 32
62
Embodied Water, L/kg 62
420

Common Calculations

Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 40
9.3 to 17
Strength to Weight: Bending, points 31
12 to 18
Thermal Diffusivity, mm2/s 11
42
Thermal Shock Resistance, points 37
7.6 to 13

Alloy Composition

Aluminum (Al), % 0
8.0 to 8.8
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
0.8 to 1.3
Iron (Fe), % 92.1 to 94.2
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
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 0.045
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
89.7 to 91.2