UNS C37100 Leaded Brass
C37100 brass is a brass formulated for primary forming into wrought products.
The properties of C37100 brass include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C37100 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
8.0 to 40 %
Poisson's Ratio
0.31
Rockwell Superficial 30T Hardness
43 to 71
Shear Modulus
40 GPa 5.8 x 106 psi
Shear Strength
260 to 300 MPa 37 to 44 x 103 psi
Tensile Strength: Ultimate (UTS)
370 to 520 MPa 54 to 75 x 103 psi
Tensile Strength: Yield (Proof)
150 to 390 MPa 22 to 57 x 103 psi
Thermal Properties
Latent Heat of Fusion
170 J/g
Maximum Temperature: Mechanical
120 °C 240 °F
Melting Completion (Liquidus)
900 °C 1650 °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 69 BTU/h-ft-°F
Thermal Expansion
21 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
27 % IACS
Electrical Conductivity: Equal Weight (Specific)
30 % IACS
Otherwise Unclassified Properties
Base Metal Price
23 % relative
Density
8.0 g/cm3 500 lb/ft3
Embodied Carbon
2.7 kg CO2/kg material
Embodied Energy
45 MJ/kg 20 x 103 BTU/lb
Embodied Water
320 L/kg 38 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
38 to 120 MJ/m3
Resilience: Unit (Modulus of Resilience)
110 to 750 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
13 to 18 points
Strength to Weight: Bending
14 to 18 points
Thermal Diffusivity
39 mm2/s
Thermal Shock Resistance
12 to 17 points
Alloy Composition
Among wrought copper alloys, the composition of C37100 brass is notable for containing comparatively high amounts of lead (Pb) and iron (Fe). Lead is used to improve machinability and bearing properties, at the cost of toxicity. Iron is used to increase strength inexpensively.
| Cu | 58 to 62 | |
| Zn | 36.3 to 41.4 | |
| Pb | 0.6 to 1.2 | |
| Fe | 0 to 0.15 | |
| res. | 0 to 0.4 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993