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UNS C49300 Bismuth Brass

C49300 brass is a brass formulated for primary forming into wrought products. It has a moderately low melting temperature and a moderately low thermal conductivity among wrought brasses.

The properties of C49300 brass include four common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C49300 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

4.5 to 20 %

Poisson's Ratio

0.31

Shear Modulus

40 GPa 5.7 x 106 psi

Shear Strength

270 to 290 MPa 39 to 42 x 103 psi

Tensile Strength: Ultimate (UTS)

430 to 520 MPa 62 to 75 x 103 psi

Tensile Strength: Yield (Proof)

210 to 410 MPa 31 to 59 x 103 psi

Thermal Properties

Latent Heat of Fusion

170 J/g

Maximum Temperature: Mechanical

120 °C 260 °F

Melting Completion (Liquidus)

880 °C 1620 °F

Melting Onset (Solidus)

840 °C 1540 °F

Specific Heat Capacity

380 J/kg-K 0.091 BTU/lb-°F

Thermal Conductivity

88 W/m-K 51 BTU/h-ft-°F

Thermal Expansion

20 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

15 % IACS

Electrical Conductivity: Equal Weight (Specific)

17 % IACS

Otherwise Unclassified Properties

Base Metal Price

26 % relative

Density

8.0 g/cm3 500 lb/ft3

Embodied Carbon

3.0 kg CO2/kg material

Embodied Energy

50 MJ/kg 22 x 103 BTU/lb

Embodied Water

370 L/kg 45 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

21 to 71 MJ/m3

Resilience: Unit (Modulus of Resilience)

220 to 800 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

15 to 18 points

Strength to Weight: Bending

16 to 18 points

Thermal Diffusivity

29 mm2/s

Thermal Shock Resistance

14 to 18 points

Alloy Composition

Among wrought copper alloys, the composition of C49300 brass is notable for including bismuth (Bi) and antimony (Sb). Bismuth improves machinability. It is used a non-toxic but more expensive replacement for lead. Antimony is used to improve certain types of corrosion resistance.

Copper (Cu) 58 to 62
Zinc (Zn) 30.6 to 40.5
Tin (Sn) 1.0 to 1.8
Bismuth (Bi) 0.5 to 2.0
Nickel (Ni) 0 to 1.5
Aluminum (Al) 0 to 0.5
Antimony (Sb) 0 to 0.5
Phosphorus (P) 0 to 0.2
Selenium (Se) 0 to 0.2
Silicon (Si) 0 to 0.1
Iron (Fe) 0 to 0.1
Manganese (Mn) 0 to 0.030
Lead (Pb) 0 to 0.010
Residuals 0 to 0.5

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

Followup Questions

Similar Alloys