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.
| Cu | 58 to 62 | |
| Zn | 30.6 to 40.5 | |
| Sn | 1.0 to 1.8 | |
| Bi | 0.5 to 2.0 | |
| Ni | 0 to 1.5 | |
| Al | 0 to 0.5 | |
| Sb | 0 to 0.5 | |
| P | 0 to 0.2 | |
| Se | 0 to 0.2 | |
| Si | 0 to 0.1 | |
| Fe | 0 to 0.1 | |
| Mn | 0 to 0.030 | |
| Pb | 0 to 0.010 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.