Nov 12 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal propertiesOther DesignationsFabrication and Heat Treatment Machinability Welding
Introduction
Leaded high-strength yellow brass UNS C86700 is a cast alloy of manganese bronze and leaded manganese bronze. The lead in the alloy gives an attractive golden color where as the manganese in the alloy gives chocolate brown color. UNS C86700 alloy is preferred in architecture for its color and longevity.
The following datasheet provides chemical composition and properties of UNS C86700 alloy.
Chemical Composition
The chemical composition of UNS C86700 alloy is given in the following table.
Element |
Content (%) |
Cu |
58 |
Zn |
41 |
Pb |
1 |
Physical Properties
The following table details the physical properties of UNS C86700 alloy.
Properties |
Metric |
Imperial |
Density |
8.32 g/cm3 |
0.301 lb/in³ |
Mechanical Properties
The mechanical properties of UNS C86700 alloy are shown in the following table.
Properties |
Metric |
Imperial |
Elastic modulus |
117 GPa |
16969 ksi |
Poisson's ratio |
0.34 |
0.34 |
Hardness, Rockwell B |
155 |
155 |
Tensile strength |
585 MPa |
84800 psi |
Yield strength |
290 MPa |
42100 psi |
Elongation at break |
20.00% |
20.00% |
Machinability |
55 |
55 |
Thermal properties
The following table discusses the thermal properties of UNS C86700 alloy.
Properties |
Metric |
Imperial |
Thermal expansion co-efficient (@20-200°C/68-392°F) |
19.0 µm/m°C |
10.6 µin/in°F |
Other Designations
Equivalent designations to UNS C86700 alloy include:
- ASTM B271
- ASTM B30
- ASTM B584
- ASTM B763
Fabrication and Heat Treatment
Machinability
UNS C86700 alloy has a machinability rating of 55.
Welding
The preferred welding techniques for UNS C86700 alloy are soldering and brazing. Carbon arc welding, oxyacetylene welding, gas shielded arc welding and coated metal arc welding are not recommended for this alloy.