Jul 17 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication
Machinability
Welding
Heat Treatment
Applications
Introduction
There are about 400 copper alloys with various compositions that provide unique characteristics to suit numerous applications. Aluminum bronze is an alloy consisting of about 6% of nickel and iron and 9 to 12% of aluminum. It has high wear resistance, good strength and high corrosion resistance.
The following datasheet will discuss about the UNS C95200 copper casting alloy.
Chemical Composition
The following table shows chemical composition of UNS C95200 copper alloy.
|
Element |
Content (%) |
|
Copper, Cu |
88 |
|
Aluminum, Al |
9 |
|
Iron, Fe |
3 |
Physical Properties
The physical properties of UNS C95200 copper alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
7.64 g/cm3 |
0.276 lb/in3 |
|
Melting point |
1040 - 1045°C |
1900 - 1913°F |
Mechanical Properties
The mechanical properties of UNS C95200 copper alloy are outlined in the following table
|
Mechanical Properties |
Metric |
Imperial |
|
Tensile strength (as cast) |
550 MPa |
79800 psi |
|
Yield strength (as cast) |
185 MPa |
26800 psi |
|
Poisson’s ratio |
0.310 |
0.310 |
|
Elongation at break (in 50 mm) |
35% |
35% |
|
Reduction of area (@150°C/302°F) |
3% |
3% |
|
Modulus of elasticity |
105 GPa |
15200 ksi |
|
Shear modulus |
39 GPa |
5660 ksi |
|
Charpy impact (@18-38°C/0.400-100°F, keyhole) |
27 J |
19.9 ft-lb |
|
Hardness, Brinell (3000 kg) |
125 |
125 |
|
Hardness, Rockwell B |
64 |
64 |
|
Machinability (UNS C36000 (free-cutting brass) = 100) |
20 |
20 |
Thermal Properties
The thermal properties of UNS C95200 copper alloy are given in the following table.
|
Thermal Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-300°C/68-572°F) |
16.2 µm/m°C |
9 µin/in°F |
|
Thermal conductivity (@20°C /68°F) |
50.0 W/mK |
347 BTU in/hr.ft2.°F |
Other Designations
Other designations that are equivalent to UNS C95200 copper alloy include:
-
ASME B16.24
-
ASME SB148
-
ASME SB271
-
ASME SB505
-
ASTM B148
-
ASTM B271
-
ASTM B30
-
ASTM B505
-
ASTM B763
-
QQ C390
-
SAE J461
-
SAE J462
Fabrication
Machinability
The machinability rating of UNS C95200 copper alloy is 50.
Welding
UNS C95200 copper alloy can be welded using soldering, brazing, carbon arc welding, gas shielded arc welding and coated metal arc welding. Oxyacetylene welding is not preferred for this type of alloys.
Heat Treatment
UNS C95200 copper alloy is stress relieved at 316°C (600°F). The time taken for stress relieving is about 1 h/in. of section thickness. This alloy is unresponsive to heat treatment.
Applications
The following are the major applications of UNS C95200 copper alloy:
-
Acid-resisting pumps
-
Bearings
-
Gears
-
Valve seats
-
Guides
-
Plungers
-
Pump rods
-
Bushings