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C84400 Valve Metal vs. C87500 Brass

Both C84400 valve metal and C87500 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is C84400 valve metal and the bottom bar is C87500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 19
18
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 39
42
Tensile Strength: Ultimate (UTS), MPa 230
460
Tensile Strength: Yield (Proof), MPa 110
190

Thermal Properties

Latent Heat of Fusion, J/g 180
260
Maximum Temperature: Mechanical, °C 160
170
Melting Completion (Liquidus), °C 1000
920
Melting Onset (Solidus), °C 840
820
Specific Heat Capacity, J/kg-K 370
410
Thermal Conductivity, W/m-K 72
28
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 17
7.3

Otherwise Unclassified Properties

Base Metal Price, % relative 29
27
Density, g/cm3 8.8
8.3
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 46
44
Embodied Water, L/kg 340
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
67
Resilience: Unit (Modulus of Resilience), kJ/m3 58
160
Stiffness to Weight: Axial, points 6.6
7.4
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 7.2
16
Strength to Weight: Bending, points 9.4
16
Thermal Diffusivity, mm2/s 22
8.3
Thermal Shock Resistance, points 8.3
17

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.5
Antimony (Sb), % 0 to 0.25
0
Copper (Cu), % 78 to 82
79 to 85
Iron (Fe), % 0 to 0.4
0
Lead (Pb), % 6.0 to 8.0
0 to 0.5
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 1.5
0
Silicon (Si), % 0 to 0.0050
3.0 to 5.0
Sulfur (S), % 0 to 0.080
0
Tin (Sn), % 2.3 to 3.5
0
Zinc (Zn), % 7.0 to 10
12 to 16
Residuals, % 0
0 to 0.5