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C68400 Brass vs. C47940 Brass

Both C68400 brass and C47940 brass are copper alloys. They have a moderately high 94% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is C68400 brass and the bottom bar is C47940 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 18
14 to 34
Poisson's Ratio 0.31
0.31
Shear Modulus, GPa 41
40
Shear Strength, MPa 330
250 to 310
Tensile Strength: Ultimate (UTS), MPa 540
380 to 520
Tensile Strength: Yield (Proof), MPa 310
160 to 390

Thermal Properties

Latent Heat of Fusion, J/g 210
170
Maximum Temperature: Mechanical, °C 130
130
Melting Completion (Liquidus), °C 840
850
Melting Onset (Solidus), °C 820
800
Specific Heat Capacity, J/kg-K 400
380
Thermal Conductivity, W/m-K 66
110
Thermal Expansion, µm/m-K 20
20

Otherwise Unclassified Properties

Base Metal Price, % relative 23
25
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 2.7
2.8
Embodied Energy, MJ/kg 47
47
Embodied Water, L/kg 320
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
68 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 460
120 to 740
Stiffness to Weight: Axial, points 7.5
7.1
Stiffness to Weight: Bending, points 20
19
Strength to Weight: Axial, points 19
13 to 17
Strength to Weight: Bending, points 19
14 to 17
Thermal Diffusivity, mm2/s 21
36
Thermal Shock Resistance, points 18
13 to 17

Alloy Composition


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Aluminum (Al), % 0 to 0.5
0
Boron (B), % 0.0010 to 0.030
0
Copper (Cu), % 59 to 64
63 to 66
Iron (Fe), % 0 to 1.0
0.1 to 1.0
Lead (Pb), % 0 to 0.090
1.0 to 2.0
Manganese (Mn), % 0.2 to 1.5
0
Nickel (Ni), % 0 to 0.5
0.1 to 0.5
Phosphorus (P), % 0.030 to 0.3
0
Silicon (Si), % 1.5 to 2.5
0
Tin (Sn), % 0 to 0.5
1.2 to 2.0
Zinc (Zn), % 28.6 to 39.3
28.1 to 34.6
Residuals, % 0 to 0.5
0 to 0.4