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C85200 Brass vs. C87500 Brass

Both C85200 brass and C87500 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 87% of their average alloy composition in common.

For each property being compared, the top bar is C85200 brass and the bottom bar is C87500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 28
18
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 40
42
Tensile Strength: Ultimate (UTS), MPa 270
460
Tensile Strength: Yield (Proof), MPa 95
190

Thermal Properties

Latent Heat of Fusion, J/g 180
260
Maximum Temperature: Mechanical, °C 140
170
Melting Completion (Liquidus), °C 940
920
Melting Onset (Solidus), °C 930
820
Specific Heat Capacity, J/kg-K 380
410
Thermal Conductivity, W/m-K 84
28
Thermal Expansion, µm/m-K 20
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 19
7.3

Otherwise Unclassified Properties

Base Metal Price, % relative 26
27
Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 46
44
Embodied Water, L/kg 330
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 59
67
Resilience: Unit (Modulus of Resilience), kJ/m3 42
160
Stiffness to Weight: Axial, points 7.0
7.4
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 8.9
16
Strength to Weight: Bending, points 11
16
Thermal Diffusivity, mm2/s 27
8.3
Thermal Shock Resistance, points 9.3
17

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.5
Antimony (Sb), % 0 to 0.2
0
Copper (Cu), % 70 to 74
79 to 85
Iron (Fe), % 0 to 0.6
0
Lead (Pb), % 1.5 to 3.8
0 to 0.5
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.050
3.0 to 5.0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0.7 to 2.0
0
Zinc (Zn), % 20 to 27
12 to 16
Residuals, % 0
0 to 0.5