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C68800 Brass vs. R05255 Alloy

C68800 brass belongs to the copper alloys classification, while R05255 alloy belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is C68800 brass and the bottom bar is R05255 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 2.0 to 36
20
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 41
70
Tensile Strength: Ultimate (UTS), MPa 570 to 890
540
Tensile Strength: Yield (Proof), MPa 390 to 790
450

Thermal Properties

Latent Heat of Fusion, J/g 190
140
Specific Heat Capacity, J/kg-K 400
140
Thermal Conductivity, W/m-K 40
59
Thermal Expansion, µm/m-K 19
6.6

Otherwise Unclassified Properties

Density, g/cm3 8.2
17
Embodied Water, L/kg 350
630

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 180
100
Resilience: Unit (Modulus of Resilience), kJ/m3 710 to 2860
530
Stiffness to Weight: Axial, points 7.3
6.3
Stiffness to Weight: Bending, points 19
11
Strength to Weight: Axial, points 19 to 30
9.1
Strength to Weight: Bending, points 19 to 25
8.9
Thermal Diffusivity, mm2/s 12
25
Thermal Shock Resistance, points 19 to 30
31

Alloy Composition

Aluminum (Al), % 3.0 to 3.8
0
Carbon (C), % 0
0 to 0.010
Cobalt (Co), % 0.25 to 0.55
0
Copper (Cu), % 70.8 to 75.5
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.2
0 to 0.010
Lead (Pb), % 0 to 0.050
0
Molybdenum (Mo), % 0
0 to 0.020
Nickel (Ni), % 0
0 to 0.010
Niobium (Nb), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Silicon (Si), % 0
0 to 0.0050
Tantalum (Ta), % 0
95.9 to 98
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
2.0 to 3.5
Zinc (Zn), % 21.3 to 24.1
0
Residuals, % 0 to 0.5
0