Sep 20 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Hot Working Cold Working Annealing
Introduction
Brass includes a broad range of copper-zinc alloys having a variety of properties such as ductility, wear-resistance, color, machinability, strength, hardness, antimicrobial, corrosion-resistance, and electrical and thermal conductivity.
The following datasheet will provide more details about UNS C68700 arsenical aluminium brass alloy.
Chemical Composition
The following table shows the chemical composition of UNS C68700 arsenical aluminium brass alloy.
| Element |
Content (%) |
| Cu |
77.5 |
| Zn |
20.4 |
| Al |
2 |
| As |
0.1 |
Physical Properties
The physical properties of UNS C68700 arsenical aluminium brass alloy are outlined in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.33 g/cc |
0.301 lb/in3 |
Mechanical Properties
The mechanical properties UNS C68700 arsenical aluminium brass alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Tensile strength |
414 MPa |
60000 psi |
| Yield strength (depending on temper) |
186 MPa |
27000 psi |
| Elongation at break (in 50.8 mm) |
55.00% |
55.00% |
| Elastic modulus |
117 GPa |
17000 ksi |
| Poisson¡¯s ratio |
0.34 |
0.34 |
| Machinability (UNS C36000 (free-cutting brass) = 100) |
30 |
30 |
Other Designations
Equivalent materials to UNS C68700 arsenical aluminium brass alloy are:
- ASME SB111
- ASME SB359
- ASME SB395
- ASME SB543
- ASTM B111
- ASTM B359
- ASTM B395
- ASTM B543
Fabrication and Heat Treatment
Machinability
The machinability rate of the UNS C68700 is 30.
Welding
Soldering, brazing, oxyacetylene welding, gas shielded arc welding, spot welding, seam welding, and butt welding are considered as suitable welding processes, whereas processes such as coated metal arc welding are not recommended for the UNS C68700 alloys.
Hot Working
The hot working capacity of the UNS C68700 is fair with the suitable hot working temperature ranging between 760 and 871.1°C (1400 and 1600°F).
Cold Working
The UNS C68700 has excellent cold working capacity.
Annealing
The annealing temperature of the UNS C68700 is between 427 and 593°C (800 and 1100°F).