Sep 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Forging Hot Working Cold Working AnnealingApplications
Introduction
Copper can be formed into alloys more freely than most metals. It can also be combined with a broad range of alloying elements. There are 400 types of copper alloys with each consisting of many properties that are suitable for various applications, manufacturing processes, and environments.
UNS C46400 alloys are a type of brass-copper alloys. It is also known as naval brass. These alloys have good corrosion resistance, hot workability, and hot forgeability. The following datasheet will provide details about UNS C44400 brass-copper alloys.
Chemical Composition
The following table shows the chemical composition of UNS C46400 brass-copper alloys.
| Element |
Content (%) |
| Cu |
60 |
| Sn |
0.75 |
| Zn |
39.25 |
Physical Properties
The physical properties of UNS C46400 brass-copper alloys are outlined in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.41 g/cc |
0.304 lb/in³ |
| Melting point |
888°C |
1630°F |
Mechanical Properties
The mechanical properties UNS C46400 brass-copper alloys are tabulated below.
| Properties |
Metric |
Imperial |
| Tensile strength |
379-607 MPa |
55000-88000 psi |
| Yield strength (depending on temper) |
172-455 MPa |
24900-66000 psi |
| Elongation at break (in 431.8 mm) |
50% |
50% |
| Elastic modulus |
117 GPa |
17000 ksi |
| Poisson’s ratio |
0.34 |
0.34 |
| Machinability (UNS C36000 (free-cutting brass) = 100) |
30 |
30 |
| Shear modulus |
39.0 GPa |
5660 ksi |
Thermal Properties
The thermal properties UNS C46400 brass-copper alloys are tabulated below.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@ 20-300°C/68-572°F) |
21.2 µm/m°C |
11.8 µin/in°F |
| Thermal conductivity (@20°C/68°F) |
116 W/mK |
805 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to UNS C46400 brass-copper alloys are:
- ASME SB171
- ASTM B124
- ASTM B171
- ASTM B21
- ASTM B283
- ASTM B432
- ASTM F467
- ASTM F468
- MIL W-6712
- QQ B639
- SAE J461
- SAE J463
Fabrication and Heat Treatment
Machinability
The machinability rate of UNS C46400 brass-copper alloys are 30.
Welding
Soldering, brazing, oxyacetylene welding, gas shielded arc welding, spot welding, seam welding, and butt welding are considered as suitable welding processes, whereas coated metal arc welding is not recommended for UNS C46400 alloys.
Forging
The hot forgeability rating of UNS C46400 is 90 with the preferred hot working temperature being between 649 and 816°C (1200 and 1500°F).
Hot Working
The hot working capacity of UNS C46400 alloys is rated as excellent.
Cold Working
The UNS C46400 alloys have fair cold working capacity.
Annealing
The annealing temperature of the UNS C46400 alloys is between and 427 and 593°C (800 and 1100°F).
Applications
The UNS C46400 brass-copper alloys are mainly used for fasteners, hardware that requires corrosion resistant service, and marine applications. They are also used for high strength cold headed products.