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Spring-Tempered (H08) C43400 Brass

H08 C43400 brass is C43400 brass in the H08 (spring) temper. It has the second highest strength and second lowest ductility compared to the other variants of C43400 brass. The graph bars on the material properties cards below compare H08 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

4.0 %

Poisson's Ratio

0.33

Rockwell B Hardness

86

Rockwell Superficial 30T Hardness

76

Shear Modulus

42 GPa 6.1 x 106 psi

Shear Strength

370 MPa 54 x 103 psi

Tensile Strength: Ultimate (UTS)

620 MPa 90 x 103 psi

Tensile Strength: Yield (Proof)

550 MPa 80 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)

24 MJ/m3

Resilience: Unit (Modulus of Resilience)

1380 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

20 points

Strength to Weight: Bending

19 points

Thermal Diffusivity

41 mm2/s

Thermal Shock Resistance

21 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