Sep 19 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Hot Working Cold Working Annealing
Introduction
Copper has the ability to 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 a variety of properties that are suitable for many applications, manufacturing processes, and environments.
UNS C44400 alloys are a type of brass-copper alloys, and are also known as admiralty and antimonial alloys. These alloys have good corrosion resistance and good cold workability for forming and bending. The following datasheet will provide details about UNS C44400 brass-copper alloys.
Chemical Composition
The following table shows the chemical composition of UNS C44400 brass-copper alloys.
| Element |
Content (%) |
| Cu |
71 |
| Sn |
1 |
| Zn |
28 |
Physical Properties
The physical properties of UNS C44400 brass-copper alloys are outlined in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.53 g/cm3 |
0.308 lb/in³ |
Mechanical Properties
The mechanical properties UNS C44400 brass-copper alloys are tabulated below.
| Properties |
Metric |
Imperial |
| Tensile strength |
331-379 MPa |
48000-55000 psi |
| Yield strength (depending on temper) |
124-152 MPa |
18000-22000 psi |
| Elongation at break (in 0 mm) |
65% |
65% |
| Creep strength (@425°C, time 3.60e+6 sec/797°F, time 1000 hr, 0.0001) |
0.370 MPa |
53.7 psi |
| Elastic modulus |
117 GPa |
17000 ksi |
| Poisson’s ratio |
0.34 |
0.34 |
| Charpy impact |
82.4 J |
60.8 ft lb |
| Fatigue strength (@# of cycles 1.00e+7, @# of cycles 1.00e+7, source does not state temper) |
115-125 MPa |
16700-18100 psi |
| Machinability (UNS C36000 (free cutting brass) = 100) |
30 |
30 |
| Shear modulus |
40.0 GPa |
5800 ksi |
Thermal Properties
The thermal properties UNS C44400 brass-copper alloys are tabulated below.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@20-300°C/68-572°F) |
20.2 µm/m°C |
11.2 µin/in°F |
| Thermal conductivity (@20°C/68°F) |
110 W/mK |
763 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to UNS C44400 brass-copper alloys are:
- ASME SB111
- ASME SB171
- ASME SB359
- ASME SB395
- ASME SB543
- ASTM B111
- ASTM B171
- ASTM B359
- ASTM B395
- ASTM B432
- ASTM B543
Fabrication and Heat Treatment
Machinability
The machinability rate of UNS C44400 brass-copper alloys are 30.
Welding
Soldering, brazing, oxyacetylene welding, butt welding, spot welding, and gas shielded arc welding are considered as suitable welding processes, whereas processes such as coated metal arc welding and seam welding are not recommended for the UNS C44400 alloys.
Hot Working
The hot working capacity of UNS C44400 is rated as fair with the suitable hot working temperature being between 649 and 788°C (1200 and 1450°F).
Cold Working
UNS C44400 alloys have excellent cold working capacity.
Annealing
The annealing temperature of UNS C44400 alloys is between and 427 and 593°C (800 and 1100°F).