Oct 25 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Welding
Machinability
Heat Treatment
Applications
Introduction
The UNS C93900 alloy is a high-leaded tin bronze copper casting alloy. Other types of bronze alloys include phosphor bronze, tin bronze, aluminum bronze, silicon bronze, architectural bronze and manganese bronze.
The following datasheet provides an overview the UNS C93900 alloy.
Chemical Composition
The chemical composition of the UNS C93900 alloy is outlined in the following table.
|
Element |
Content (%) |
|
Cu |
76.5-79.5 |
|
Pb |
14.0-18.0 |
|
Sn |
5.0-7.0 |
|
Zn |
1.50 |
|
Ni |
0.80 |
|
Fe |
0.40 |
|
P |
0.050 |
Physical Properties
The following table shows the physical properties of the UNS C93900 alloy.
|
Properties |
Metric |
Imperial |
|
Density |
9.25 g/cm3 |
0.334 lb/in³ |
Mechanical Properties
The mechanical properties of UNS C93900 alloy are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Hardness, Brinell (typically) |
63 |
63 |
|
Tensile strength |
220 MPa |
31900 psi |
|
Yield strength (@strain 0.500 %) |
150 MPa |
21800 psi |
|
Elongation at break (in 50 mm) |
7.00% |
7.00% |
|
Machinability (UNS C36000 (free-cutting brass) = 100) |
80 |
80 |
|
Poisson's ratio |
0.34 |
0.34 |
|
Elastic modulus |
117 GPa |
16969 ksi |
Thermal Properties
The thermal properties of UNS C93900 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-204°C/68-399°F) |
18.5 µm/m°C |
10.3 µin/in°F |
|
Thermal conductivity (@20°C/68°F) |
52.0 W/mK |
361 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to UNS C93900 alloy are:
-
ASTM B30
-
ASTM B505
-
QQ C390
Fabrication and Heat Treatment
Welding
Soldering is suitable for UNS C93900 alloy. Welding processes not recommended for this alloy include brazing, gas shielded arc welding, carbon arc welding, coated metal arc welding and oxyacetylene welding.
Machinability
The machinability rating of UNS C93900 alloy is 80.
Heat Treatment
UNS C93900 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 C93900 alloy is used for pump bodies, bearings, mine water impellers and continuous castings.