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3/4-Hard (H03) C42500 Brass

H03 C42500 brass is C42500 brass in the H03 (3/4 hard) temper. The graph bars on the material properties cards below compare H03 C42500 brass to: wrought 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

Elastic (Young's, Tensile) Modulus

110 GPa 16 x 106 psi

Elongation at Break

15 %

Poisson's Ratio

0.33

Rockwell B Hardness

80

Rockwell Superficial 30T Hardness

70

Shear Modulus

42 GPa 6.1 x 106 psi

Shear Strength

290 MPa 41 x 103 psi

Tensile Strength: Ultimate (UTS)

470 MPa 68 x 103 psi

Tensile Strength: Yield (Proof)

440 MPa 63 x 103 psi

Thermal Properties

Latent Heat of Fusion

200 J/g

Maximum Temperature: Mechanical

180 °C 350 °F

Melting Completion (Liquidus)

1030 °C 1890 °F

Melting Onset (Solidus)

1010 °C 1850 °F

Specific Heat Capacity

380 J/kg-K 0.091 BTU/lb-°F

Thermal Conductivity

120 W/m-K 69 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

28 % IACS

Electrical Conductivity: Equal Weight (Specific)

29 % IACS

Otherwise Unclassified Properties

Base Metal Price

30 % relative

Density

8.7 g/cm3 540 lb/ft3

Embodied Carbon

2.8 kg CO2/kg material

Embodied Energy

46 MJ/kg 20 x 103 BTU/lb

Embodied Water

330 L/kg 39 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

69 MJ/m3

Resilience: Unit (Modulus of Resilience)

860 kJ/m3

Stiffness to Weight: Axial

7.1 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

15 points

Strength to Weight: Bending

15 points

Thermal Diffusivity

36 mm2/s

Thermal Shock Resistance

17 points

Alloy Composition

Copper (Cu)Cu 87 to 90
Zinc (Zn)Zn 6.1 to 11.5
Tin (Sn)Sn 1.5 to 3.0
Phosphorus (P)P 0 to 0.35
Iron (Fe)Fe 0 to 0.050
Lead (Pb)Pb 0 to 0.050
Residualsres. 0 to 0.5

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

Followup Questions