Nov 14 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Welding
Forging
Hot Working
Cold Working
Annealing
Applications
Introduction
Brass includes a broad range of copper-zinc alloys having a
variety of properties such as ductility, wear-resistance, color,
machinability, strength, hardness, antimicrobial, corrosion-resistance,
and electrical and thermal conductivity. UNS C69400 silicon red brass
alloy is one of the types of brass, which have hot forgeability, high
strength and good corrosion resistance.
The following datasheet will provide more details about UNS
C69400 silicon red brass alloy.
Chemical Composition
The following table shows the chemical composition
of UNS C69400 silicon red brass alloy.
| Element |
Content
(%) |
| Cu, Copper |
81.5 |
| Si, Silicon |
4.0 |
| Zn, Zinc |
14.5 |
Physical Properties
The physical properties of UNS C69400 silicon red brass alloy
are outlined in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.19 g/cm3 |
0.296 lb/in³ |
| Melting point |
821°C |
1510°F |
Mechanical Properties
The mechanical properties of UNS C69400 silicon red brass
alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Tensile strength |
565-896 MPa |
81900-130000 psi |
| Yield strength
(depending on temper) |
276-393 MPa |
40000-57000 psi |
| Elongation at break
(in 508 mm) |
25.00% |
25.00% |
| Elastic modulus |
117 GPa |
17000 ksi |
| Poisson’s ratio |
0.34 |
0.34 |
| Machinability (UNS
C36000 (free-cutting brass) = 100) |
30 |
30 |
Thermal Properties
The thermal properties of UNS C69400 silicon red brass
alloys are tabulated below.
| Properties |
Metric |
Imperial |
| Thermal expansion
co-efficient (at 20-300°C/68-572°F) |
20.2 µm/m°C |
11.2 µin/in°F |
| Thermal conductivity |
26 W/mK |
180 BTU in/hr.ft².°F |
Other Designations
Equivalent material to UNS C69400 silicon red brass alloy
is ASTM B371.
Fabrication and Heat
Treatment
Machinability
The machinability rate of UNS C69400 silicon red brass
alloys is 30.
Welding
Soldering, brazing, oxyacetylene welding, spot welding, seam
welding, and butt welding are considered as suitable welding processes
for UNS C69400 alloy.
Forging
UNS C69400 alloy has a hot forgeability rating of 80 with
the recommended hot working temperature ranging between 649 and 871°C
(1200 and 1600°F).
Hot Working
The hot working capacity of UNS C69400 silicon red brass
alloy is excellent.
Cold Working
The cold working capacity of UNS C69400 is poor.
Annealing
The annealing temperature of UNS C69400 silicon red brass
alloy is between and 427 and 649°C (800 and 1200°F).
Applications
UNS C69400 silicon red brass alloy is used in heavy-duty
mechanical components such as bearings, and used for pump components
and valve stems.