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UNS C84000 Semi-Red Brass

C84000 brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a fairly high base cost among cast brasses. In addition, it has a fairly high melting temperature and a moderately high embodied energy.

The graph bars on the material properties cards below compare C84000 brass to: cast brasses (top), all copper alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Brinell Hardness

65

Elastic (Young's, Tensile) Modulus

110 GPa 16 x 106 psi

Elongation at Break

27 %

Poisson's Ratio

0.33

Shear Modulus

42 GPa 6.1 x 106 psi

Tensile Strength: Ultimate (UTS)

250 MPa 37 x 103 psi

Tensile Strength: Yield (Proof)

140 MPa 20 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

170 °C 350 °F

Melting Completion (Liquidus)

1040 °C 1910 °F

Melting Onset (Solidus)

940 °C 1720 °F

Specific Heat Capacity

380 J/kg-K 0.091 BTU/lb-°F

Thermal Conductivity

72 W/m-K 42 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

16 % IACS

Electrical Conductivity: Equal Weight (Specific)

17 % IACS

Otherwise Unclassified Properties

Base Metal Price

30 % relative

Density

8.6 g/cm3 540 lb/ft3

Embodied Carbon

3.0 kg CO2/kg material

Embodied Energy

49 MJ/kg 21 x 103 BTU/lb

Embodied Water

330 L/kg 40 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

58 MJ/m3

Resilience: Unit (Modulus of Resilience)

83 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

8.2 points

Strength to Weight: Bending

10 points

Thermal Diffusivity

22 mm2/s

Thermal Shock Resistance

9.0 points

Alloy Composition

Among cast copper alloys, the composition of C84000 brass is notable for including zirconium (Zr). Zirconium is used to increase recrystallization temperature and to permit or facilitate certain forms of heat treatment.

Copper (Cu) 82 to 89
Zinc (Zn) 5.0 to 14
Tin (Sn) 2.0 to 4.0
Nickel (Ni) 0.5 to 2.0
Sulfur (S) 0.1 to 0.65
Iron (Fe) 0 to 0.4
Boron (B) 0 to 0.1
Zirconium (Zr) 0 to 0.1
Lead (Pb) 0 to 0.090
Phosphorus (P) 0 to 0.050
Antimony (Sb) 0 to 0.020
Manganese (Mn) 0 to 0.010
Silicon (Si) 0 to 0.0050
Aluminum (Al) 0 to 0.0050
Residuals 0 to 0.7

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

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