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ASTM A387 Grade 91 Class 2 vs. Zamak 2

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while Zamak 2 belongs to the zinc alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is Zamak 2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
100
Elastic (Young's, Tensile) Modulus, GPa 190
87
Elongation at Break, % 20
6.0
Fatigue Strength, MPa 330
59
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 75
33
Shear Strength, MPa 420
320
Tensile Strength: Ultimate (UTS), MPa 670
360
Tensile Strength: Yield (Proof), MPa 470
270

Thermal Properties

Latent Heat of Fusion, J/g 270
130
Maximum Temperature: Mechanical, °C 600
95
Melting Completion (Liquidus), °C 1460
390
Melting Onset (Solidus), °C 1420
380
Specific Heat Capacity, J/kg-K 470
410
Thermal Conductivity, W/m-K 26
110
Thermal Expansion, µm/m-K 13
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
25
Electrical Conductivity: Equal Weight (Specific), % IACS 10
35

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
12
Density, g/cm3 7.8
6.5
Embodied Carbon, kg CO2/kg material 2.6
3.0
Embodied Energy, MJ/kg 37
57
Embodied Water, L/kg 88
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
20
Resilience: Unit (Modulus of Resilience), kJ/m3 580
420
Stiffness to Weight: Axial, points 14
7.5
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 24
15
Strength to Weight: Bending, points 22
17
Thermal Diffusivity, mm2/s 6.9
41
Thermal Shock Resistance, points 19
11

Alloy Composition

Aluminum (Al), % 0 to 0.020
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0
Copper (Cu), % 0
2.5 to 3.3
Iron (Fe), % 87.3 to 90.3
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.020 to 0.060
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0 to 0.020
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.2 to 0.5
0 to 0.030
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.0030
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zinc (Zn), % 0
92.2 to 94
Zirconium (Zr), % 0 to 0.010
0