Sep 21 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Welding
Machinability
Heat Treatment
Applications
Introduction
UNS C97800 alloy is a leaded nickel bronze copper alloy. Other types of bronze alloys include phosphor bronze, tin bronze, aluminum bronze, silicon bronze, architectural bronze and manganese bronze.
The datasheet given below provides an overview of UNS C97800 alloy.
Chemical Composition
The chemical composition of the UNS C97800 alloy is outlined in the following table.
|
Element |
Content (%) |
|
Cu |
64.0-67.0% |
|
Ni |
24.0-27.0% |
|
Sn |
4.0-5.50% |
|
Fe |
1.50% |
|
Zn |
1.0-4.0% |
|
Pb |
1.0-2.50% |
|
Mn |
1.0% |
|
Sb |
0.20% |
|
Si |
0.15% |
|
S |
0.080% |
|
P |
0.050% |
|
Al |
0.0050% |
Physical Properties
The following table shows the physical properties of UNS C97800 alloy.
|
Properties |
Metric |
Imperial |
|
Density |
8.86 g/cm3 |
0.320 lb/in³ |
Mechanical Properties
The mechanical properties of UNS C97800 alloy are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Hardness, Brinell (3000 kg) |
130 |
130 |
|
Tensile strength |
380 MPa |
55100 psi |
|
Yield strength (@strain 0.500 %) |
205 MPa |
29700 psi |
|
Elongation at break (in 50 mm) |
15.00% |
15.00% |
|
Machinability (UNS C36000 (free-cutting brass) = 100) |
60 |
60 |
|
Poisson's ratio |
0.34 |
0.34 |
|
Elastic modulus |
117 GPa |
16969 ksi |
Thermal Properties
The thermal properties of UNS C97800 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-260°C/68-500°F) |
17.5 µm/m°C |
9.72 µin/in°F |
|
Thermal conductivity (@20°C/68°F) |
25.4 W/mK |
176 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to UNS C97800 alloy are:
-
ASTM B271
-
ASTM B30
-
ASTM B505
-
ASTM B584
-
ASTM B763
-
MIL V-18436
Fabrication and Heat Treatment
Welding
Welding processes suitable for UNS C97800 alloy include brazing and soldering. Welding processes not suitable for this alloy include coated metal arc welding, gas shielded arc welding, oxyacetylene welding and carbon arc welding is rated.
Machinability
The machinability rating of UNS C97800 alloy is 60.
Heat Treatment
UNS C97800 alloy has stress relieving temperature of 260°C (500°F). This alloy does not react to heat treatment. The time at temperature for this alloy is one hour per inch of section thickness.
Applications
UNS C97800 alloy is used for musical instrument components, valve seats, sanitary and ornamental castings and valves.