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ASTM A356 Grade 8 vs. ZA-8

ASTM A356 grade 8 belongs to the iron alloys classification, while ZA-8 belongs to the zinc alloys. There are 30 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM A356 grade 8 and the bottom bar is ZA-8.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
87 to 100
Elastic (Young's, Tensile) Modulus, GPa 190
85 to 86
Elongation at Break, % 21
1.3 to 8.0
Fatigue Strength, MPa 270
51 to 100
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 73
34
Tensile Strength: Ultimate (UTS), MPa 630
210 to 370
Tensile Strength: Yield (Proof), MPa 390
210 to 290

Thermal Properties

Latent Heat of Fusion, J/g 260
110
Maximum Temperature: Mechanical, °C 440
100
Melting Completion (Liquidus), °C 1470
400
Melting Onset (Solidus), °C 1430
380
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 38
120
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
28
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
40

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
11
Density, g/cm3 7.8
6.3
Embodied Carbon, kg CO2/kg material 2.0
3.3
Embodied Energy, MJ/kg 26
62
Embodied Water, L/kg 55
420

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
2.8 to 28
Resilience: Unit (Modulus of Resilience), kJ/m3 390
260 to 490
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 22
9.3 to 17
Strength to Weight: Bending, points 21
12 to 18
Thermal Diffusivity, mm2/s 10
42
Thermal Shock Resistance, points 18
7.6 to 13

Alloy Composition

Aluminum (Al), % 0
8.0 to 8.8
Cadmium (Cd), % 0
0 to 0.0060
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 1.0 to 1.5
0
Copper (Cu), % 0
0.8 to 1.3
Iron (Fe), % 95.4 to 97.4
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
Manganese (Mn), % 0.5 to 0.9
0
Molybdenum (Mo), % 0.9 to 1.2
0
Nickel (Ni), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.2 to 0.6
0 to 0.045
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.0030
Vanadium (V), % 0.050 to 0.15
0
Zinc (Zn), % 0
89.7 to 91.2