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C85700 Brass vs. C68000 Brass

Both C85700 brass and C68000 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 96% of their average alloy composition in common. There are 26 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 C85700 brass and the bottom bar is C68000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
100
Elongation at Break, % 17
27
Poisson's Ratio 0.31
0.3
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 310
390
Tensile Strength: Yield (Proof), MPa 110
140

Thermal Properties

Latent Heat of Fusion, J/g 170
170
Maximum Temperature: Mechanical, °C 120
120
Melting Completion (Liquidus), °C 940
880
Melting Onset (Solidus), °C 910
870
Specific Heat Capacity, J/kg-K 380
390
Thermal Conductivity, W/m-K 84
96
Thermal Expansion, µm/m-K 21
21

Otherwise Unclassified Properties

Base Metal Price, % relative 24
23
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 47
48
Embodied Water, L/kg 330
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
82
Resilience: Unit (Modulus of Resilience), kJ/m3 59
95
Stiffness to Weight: Axial, points 7.2
7.3
Stiffness to Weight: Bending, points 20
20
Strength to Weight: Axial, points 11
14
Strength to Weight: Bending, points 13
15
Thermal Diffusivity, mm2/s 27
31
Thermal Shock Resistance, points 10
13

Alloy Composition

Aluminum (Al), % 0 to 0.8
0 to 0.010
Copper (Cu), % 58 to 64
56 to 60
Iron (Fe), % 0 to 0.7
0.25 to 1.3
Lead (Pb), % 0.8 to 1.5
0 to 0.050
Manganese (Mn), % 0
0.010 to 0.5
Nickel (Ni), % 0 to 1.0
0.2 to 0.8
Silicon (Si), % 0 to 0.050
0.040 to 0.15
Tin (Sn), % 0.5 to 1.5
0.75 to 1.1
Zinc (Zn), % 32 to 40
35.6 to 42.8
Residuals, % 0
0 to 0.5