Jan 7 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Welding
Hot Working
Cold Working
Annealing
Introduction
Yellow Brass UNS C26800 is a copper zinc alloy which is basically used for hot or cold formed products. Higher thermal conductivity of brass makes it ideal for heat exchangers. Altering the composition of the alloy allows brass to change into desired colors preferred by architects.
The following datasheet gives an overview of the chemical composition and properties of yellow brass UNS C26800.
Chemical Composition
The chemical composition of yellow brass UNS C26800 is detailed in the following table.
|
Element |
Content(%) |
|
Iron, Fe |
≤ 0.050 |
|
Lead, Pb |
≤ 0.15 |
|
Zinc, Zn |
31.3 - 36.0 |
|
Copper, Cu |
65.0 |
Physical Properties
The following table gives the physical properties of the UNS C26800.
|
Properties |
Metric |
Imperial |
|
Density |
8.47 g/cm3 |
0.306 lb/in3 |
|
Melting point |
904°C |
1660°F |
Mechanical Properties
The mechanical properties of the UNS C26800 are discussed below.
|
Properties |
Metric |
Imperial |
|
Hardness, Rockwell F |
58 |
58 |
|
Hardness, HR30T |
15 |
15 |
|
Tensile strength, |
315 MPa |
45700 psi |
|
Yeild strength |
97.0 MPa |
14100 psi |
|
Elongation at break |
65.00% |
65.00% |
|
Shear strength |
220 MPa |
31900 psi |
Thermal Properties
The following table provides the thermal properties of the UNS C26800.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-300°C/68-572°F) |
20.3 µm/m°C |
11.30 µin/in°F |
|
Thermal conductivity(@20°C/68°F) |
116.0 W/mK |
67 BTU in/hr.ft².°F |
Other Designations
The equivalent designations to UNS C26800 include:
-
ASTM B36
-
ASTM B587
-
MIL W-6712
-
SAE J461
-
SAE J463
Fabrication and Heat Treatment
Machinability
The UNS C26800 alloy has a machinability rate of 30.
Welding
The preferred welding techniques for the UNS C26800 include soldering, brazing, oxyacetylene welding, gas shielded arc welding, butt welding and spot welding. Seam welding and coated metal arc welding are not recommended for the UNS C26800.
Hot Working
The UNS C26800 performs poorly when hot formed.
Cold Working
The UNS C26800 has an excellent cold working property.
Annealing
Annealing of the UNS C26800 is done at temperatures ranging between 526 and 1026ºC (800 and 1300ºF).