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Spring-Tempered (H08) C23400 Brass

H08 C23400 brass is C23400 brass in the H08 (spring) temper. It has the second highest strength and lowest ductility compared to the other variants of C23400 brass. The graph bars on the material properties cards below compare H08 C23400 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

3.1 %

Poisson's Ratio

0.32

Rockwell B Hardness

90

Rockwell Superficial 30T Hardness

77

Shear Modulus

42 GPa 6.1 x 106 psi

Shear Strength

350 MPa 51 x 103 psi

Tensile Strength: Ultimate (UTS)

610 MPa 89 x 103 psi

Tensile Strength: Yield (Proof)

470 MPa 68 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

160 °C 330 °F

Melting Completion (Liquidus)

970 °C 1780 °F

Melting Onset (Solidus)

930 °C 1700 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

120 W/m-K 68 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

27 % relative

Density

8.5 g/cm3 530 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

43 MJ/kg 19 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

17 MJ/m3

Resilience: Unit (Modulus of Resilience)

980 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

36 mm2/s

Thermal Shock Resistance

21 points

Alloy Composition

Copper (Cu)Cu 81 to 84
Zinc (Zn)Zn 15.7 to 19
Iron (Fe)Fe 0 to 0.050
Lead (Pb)Pb 0 to 0.050
Residualsres. 0 to 0.2

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

Followup Questions

Further Reading

ASTM B134: Standard Specification for Brass Wire

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

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