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3/4-Hard (H03) C43400 Brass

H03 C43400 brass is C43400 brass in the H03 (3/4 hard) temper. The graph bars on the material properties cards below compare H03 C43400 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

10 %

Poisson's Ratio

0.33

Rockwell B Hardness

73

Rockwell Superficial 30T Hardness

68

Shear Modulus

42 GPa 6.1 x 106 psi

Shear Strength

310 MPa 45 x 103 psi

Tensile Strength: Ultimate (UTS)

470 MPa 68 x 103 psi

Tensile Strength: Yield (Proof)

440 MPa 64 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

1020 °C 1870 °F

Melting Onset (Solidus)

990 °C 1810 °F

Specific Heat Capacity

380 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

140 W/m-K 79 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

31 % IACS

Electrical Conductivity: Equal Weight (Specific)

32 % IACS

Otherwise Unclassified Properties

Base Metal Price

28 % relative

Density

8.6 g/cm3 540 lb/ft3

Embodied Carbon

2.7 kg CO2/kg material

Embodied Energy

44 MJ/kg 19 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

46 MJ/m3

Resilience: Unit (Modulus of Resilience)

880 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

15 points

Strength to Weight: Bending

16 points

Thermal Diffusivity

41 mm2/s

Thermal Shock Resistance

16 points

Alloy Composition

Copper (Cu)Cu 84 to 87
Zinc (Zn)Zn 11.4 to 15.6
Tin (Sn)Sn 0.4 to 1.0
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

Further Reading

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015