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Extra-Spring (H10) C34000 Brass

H10 C34000 brass is C34000 brass in the H10 (extra spring) temper. It has the highest strength compared to the other variants of C34000 brass. The graph bars on the material properties cards below compare H10 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

Poisson's Ratio

0.31

Rockwell B Hardness

91

Rockwell Superficial 30T Hardness

78

Shear Modulus

40 GPa 5.8 x 106 psi

Tensile Strength: Ultimate (UTS)

650 MPa 95 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

Stiffness to Weight: Axial

7.1 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

22 points

Strength to Weight: Bending

21 points

Thermal Diffusivity

37 mm2/s

Thermal Shock Resistance

22 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