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Ductile Cast Iron vs. C68300 Brass

Ductile cast iron belongs to the iron alloys classification, while C68300 brass belongs to the copper alloys. There are 27 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 ductile cast iron and the bottom bar is C68300 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
100
Elongation at Break, % 2.1 to 20
15
Poisson's Ratio 0.28 to 0.31
0.31
Shear Modulus, GPa 64 to 70
40
Shear Strength, MPa 420 to 800
260
Tensile Strength: Ultimate (UTS), MPa 460 to 920
430
Tensile Strength: Yield (Proof), MPa 310 to 670
260

Thermal Properties

Latent Heat of Fusion, J/g 270
180
Maximum Temperature: Mechanical, °C 290
120
Melting Completion (Liquidus), °C 1160
900
Melting Onset (Solidus), °C 1120
890
Specific Heat Capacity, J/kg-K 490
390
Thermal Conductivity, W/m-K 31 to 36
120
Thermal Expansion, µm/m-K 11
20

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
23
Density, g/cm3 7.1 to 7.5
8.0
Embodied Carbon, kg CO2/kg material 1.5
2.8
Embodied Energy, MJ/kg 21
46
Embodied Water, L/kg 43
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
56
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
330
Stiffness to Weight: Axial, points 12 to 14
7.3
Stiffness to Weight: Bending, points 24 to 26
20
Strength to Weight: Axial, points 17 to 35
15
Strength to Weight: Bending, points 18 to 29
16
Thermal Diffusivity, mm2/s 8.9 to 10
38
Thermal Shock Resistance, points 17 to 35
14

Alloy Composition

Antimony (Sb), % 0
0.3 to 1.0
Cadmium (Cd), % 0
0 to 0.010
Carbon (C), % 3.0 to 3.5
0
Copper (Cu), % 0
59 to 63
Iron (Fe), % 93.7 to 95.5
0
Lead (Pb), % 0
0 to 0.090
Phosphorus (P), % 0 to 0.080
0
Silicon (Si), % 1.5 to 2.8
0.3 to 1.0
Tin (Sn), % 0
0.050 to 0.2
Zinc (Zn), % 0
34.2 to 40.4
Residuals, % 0
0 to 0.5