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Full-Hard (H04) C34000 Brass

H04 C34000 brass is C34000 brass in the H04 (full hard) temper. The graph bars on the material properties cards below compare H04 C34000 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

100 GPa 15 x 106 psi

Elongation at Break

12 %

Poisson's Ratio

0.31

Rockwell B Hardness

80

Rockwell Superficial 30T Hardness

71

Shear Modulus

40 GPa 5.8 x 106 psi

Shear Strength

300 MPa 44 x 103 psi

Tensile Strength: Ultimate (UTS)

510 MPa 73 x 103 psi

Tensile Strength: Yield (Proof)

320 MPa 47 x 103 psi

Thermal Properties

Latent Heat of Fusion

170 J/g

Maximum Temperature: Mechanical

120 °C 260 °F

Melting Completion (Liquidus)

930 °C 1700 °F

Melting Onset (Solidus)

890 °C 1630 °F

Specific Heat Capacity

380 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

120 W/m-K 67 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

26 % IACS

Electrical Conductivity: Equal Weight (Specific)

29 % IACS

Otherwise Unclassified Properties

Base Metal Price

24 % relative

Density

8.1 g/cm3 510 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

45 MJ/kg 19 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

53 MJ/m3

Resilience: Unit (Modulus of Resilience)

500 kJ/m3

Stiffness to Weight: Axial

7.1 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

17 points

Thermal Diffusivity

37 mm2/s

Thermal Shock Resistance

17 points

Alloy Composition

Copper (Cu)Cu 62 to 65
Zinc (Zn)Zn 33 to 37.2
Lead (Pb)Pb 0.8 to 1.5
Iron (Fe)Fe 0 to 0.1
Residualsres. 0 to 0.4

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

Followup Questions

Further Reading

ASTM B121: Standard Specification for Leaded Brass Plate, Sheet, Strip, and Rolled Bar

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001