Nov 12 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Annealing Cold Working Welding Forging Machinability Hot WorkingApplications
Introduction
Manganese bronze is a type of brass that is chocolate brown in color. Manganese bronze alloys enhance the inside and outside appearances of buildings and last for a long time. They are available in many forms and are generally completed by waxing.
The UNS C67500 manganese bronze A alloy is a hot forgeable alloy with good corrosion resistance and high strength. The following datasheet provides an overview of this alloy.
Chemical Composition
The chemical composition of the UNS C67500 alloy is outlined in the following table.
| Element |
Content (%) |
| Cu |
58.5 |
| Fe |
1.4 |
| Mn |
0.1 |
| Sn |
1 |
| Zn |
39 |
Physical Properties
The following table shows the physical properties of the UNS C67500 alloy.
| Properties |
Metric |
Imperial |
| Density |
8.63 g/cc |
0.312 lb/in³ |
| Melting point |
866°C |
1590°F |
Mechanical Properties
The mechanical properties of the UNS C67500 alloy are displayed in the following table.
| Properties |
Metric |
Imperial |
| Hardness, Rockwell B |
65 |
65 |
| Tensile strength (annealed) |
448 MPa |
65000 psi |
| Tensile strength (hardened) |
565 MPa |
81900 psi |
| Yield strength (annealed) |
207 MPa |
30000 psi |
| Elongation at break (hardened) |
25% |
25% |
| Elongation at break (annealed, in 482.6 mm) |
33% |
33% |
| Machinability (UNS C36000 (free-cutting brass) = 100) |
30 |
30 |
Other Designations
Equivalent materials to the UNS C67500 alloy are:
- ASTM B124
- ASTM B138
- ASTM B283
- ASTM F467
- ASTM F468
- SAE J461
- SAE J463
Fabrication and Heat Treatment
Annealing
The UNS C67500 alloy is annealed between 427 and 593°C (800 and 1100°F).
Cold Working
The UNS C67500 alloy has poor cold working capacity.
Welding
Welding processes suitable for the UNS C67500 alloy include brazing, soldering, seam welding, spot welding, gas shielded arc welding, oxyacetylene welding and butt welding. Coated metal arc welding is not recommended for this alloy.
Forging
The UNS C67500 alloy is forged between 621 and 788°C (1150 and 1450°F). The hot forgeability rating for this alloy is 80.
Machinability
The machinability rating for the UNS C67500 alloy is 30.
Hot Working
The UNS C67500 alloy has excellent hot forming capacity.
Applications
The UNS C67500 alloy is used for pump components, bearings, heavy-duty mechanical components and valve stems.